Paper bag packaging equipment

Abstract

The utility model relates to paper bag packaging equipment which comprises a machine frame, a paper bag conveying device, a paper bag conveying device and a paper bag conveying device. The cover body feeding device comprises a feeding frame and a pushing mechanism, and the feeding frame is provided with a feeding channel; a feeding channel is arranged on the machine frame, the feeding channel gradually inclines upwards in the advancing direction of a cover body, a suction cup feeding device is further arranged on the machine frame and comprises a suction cup and a suction cup movement mechanism, and the suction cup can be driven by the suction cup movement mechanism to suck paper bags from a paper bag containing area far away from the packaging position and transfer the paper bags to the packaging position. The posture of the paper bag transferred to the packaging position can be adjusted through the suction cup movement mechanism so that the paper bag can be in a loading state, wherein an opening of the paper bag faces the side where an outlet of the feeding channel is located, and the paper bag gradually inclines upwards from the opening position to the bag bottom position. The feeding device has the advantages that stacked cover bodies can be stably pushed and fed, and the problem of toppling is not prone to occurring.

Description

TECHNICAL FIELD

[0001] The utility model relates to paper bag packaging equipment technical field. BACKGROUND

[0002] Many foods on the existing market are filled in metal cans, and a thin cover body (also called "thin cover") is arranged on the can mouth of the metal can. In order to reduce the pollution of the cover body during transportation, after the cover body is processed, a certain number of cover bodies need to be stacked tightly and stacked to form a cylinder, and then transported to a paper bag packaging equipment for packaging and leaving the factory by using a paper bag on the paper bag packaging equipment.

[0003] For example, a Chinese invention patent application with application number CN202011593099.2 (authorized publication number CN112660496B) discloses a paper bag packaging machine, which includes a rack, a storage bin, a suction cup assembly, a blocking piece, a guide assembly, a feeding device, and a material collecting device. The rack has a workbench, which has a packaging position for packaging a stack of cover bodies into a paper bag. A material collecting position is arranged downstream of the packaging position of the workbench. The feeding device is arranged upstream of the packaging position and is used to transport the cover bodies to the packaging position. The output end of the material collecting device is arranged in the area between the packaging position and the material collecting position, and is used to transport the packaged cover bodies and the outer packaging paper bag together to the material collecting position. The feeding device and the feeding process of the paper bag packaging machine are as follows: the feeding device includes a poking mechanism. The feeding channel has an inlet at the feeding end and an outlet at the discharging end for discharging the cover bodies. The outlet is connected with the inlet of the guide channel. The poking assembly of the poking mechanism is used to push the stack of cover bodies in the feeding channel into the poking assembly in the guide channel. The poking assembly has a first poking piece for pushing the stack of cover bodies from the inlet through the feeding channel, and a second poking piece for pushing the stack of cover bodies from the feeding channel to the outlet and then to the guide channel. The first and second poking pieces are arranged above the feeding channel and can move downward alternately to at least partially extend into the feeding channel.

[0004] However, the paper bag packaging machine still has some deficiencies. The guide channel of the feeding device in the above-mentioned patent application is basically arranged horizontally. When the stack of cover bodies is pushed by the poking assembly, one or more cover bodies at the front of the pushing direction may easily fall over due to inertia, which cannot guarantee that the cover bodies enter the paper bag in a good stacked state, affecting the overall packaging efficiency. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem in the prior art and provides a paper bag packaging equipment that is beneficial to the stable pushing of stacked cover bodies and does not easily fall over.

[0006] The utility model discloses a kind of paper bag packaging equipment, including:

[0007] Rack, with packing position, the packing position is equipped with packaging device for sealing packing of paper bag loaded with cover body;

[0008] Cover body feeding device, including feeding frame and pushing mechanism, the feeding frame has feeding channel on it, the pushing mechanism can act on the cover body stacked placed on the feeding channel, and push cover body along the feeding channel forward;

[0009] The feeding channel gradually inclines upwards along the forward direction of the cover body, the rack is further provided with suction disc feeding device, and the suction disc feeding device includes suction disc and suction disc movement mechanism, the suction disc can be driven by the suction disc movement mechanism, and paper bag is sucked from the paper bag placing area away from the packing position and is moved to the packing position, and the paper bag moved to the packing position can be adjusted in posture by the suction disc movement mechanism and is in loading state: the opening of the paper bag is towards the side where the outlet of the feeding channel is located, and the paper bag gradually inclines upwards from its opening position to its bag bottom position.

[0010] In order to realize the inclined structure design of feeding channel, the rack is provided with feeding platform, the feeding frame is arranged on the feeding platform, the feeding platform has first end adjacent to the packing position and second end away from the packing position, and the height position of the first end of the feeding platform is higher than the height position of the second end of the feeding platform. The above structure design can make the feeding frame keep parallel with the feeding platform to realize inclined design, and other matching components or mechanisms arranged on the feeding platform can also be well adapted with the feeding frame.

[0011] In order to flexibly adjust the inclination angle of feeding platform (feeding channel), so as to adapt to the pushing needs of cover bodies of different sizes, the rack is provided with first height adjusting rod assembly for supporting the feeding platform and adjusting the height of the first end of the feeding platform at a position corresponding to the first end of the feeding platform, and the rack is provided with second height adjusting rod assembly for supporting the feeding platform and adjusting the height of the second end of the feeding platform at a position corresponding to the second end of the feeding platform.

[0012] In order to push the stacked cover bodies into the paper bag for conveniently opening the bag mouth, an upper feeding guide plate assembly for receiving the stacked cover bodies pushed from the feeding channel and moving the stacked cover bodies into the paper bag at the packaging position is arranged at the outlet of the feeding channel, the upper feeding guide plate assembly comprises two guide pieces arranged oppositely at both sides of the outlet of the feeding channel and extending along the feeding direction of the stacked cover bodies, a guide channel for the cover bodies to pass through is formed between the two guide pieces, an inlet of the guide channel is formed between the first ends of the two guide pieces, and an outlet of the guide channel is formed between the second ends of the two guide pieces, the outlet of the upper feeding guide plate assembly can move towards the paper bag at the packaging position and the end where the outlet is located can extend into the paper bag, during the process that the cover bodies to be packaged are located in the guide channel and moved along the guide channel by the pushing mechanism, the ends where the outlets of the two guide pieces are located can move away from each other to open the bag mouth, thereby allowing the stacked cover bodies in the guide channel to enter the paper bag.

[0013] In order to conveniently extend the corresponding end of the upper feeding guide plate assembly into the paper bag and allow the cover bodies to smoothly separate from the upper feeding guide plate assembly and enter the paper bag, the upper feeding guide plate assembly further comprises a mounting seat for mounting the guide pieces and an upper feeding driving mechanism for driving the mounting seat to move forward and backward, the positions adjacent to the middle parts of the two guide pieces are rotatably mounted on the mounting seat and the rotation axes are vertically extended, in the natural state, the distance between the second ends of the two guide pieces is smaller than the distance between the first ends, so as to correspondingly make the opening degree of the outlet smaller than the opening degree of the inlet.

[0014] Considering that a corresponding cover body counting unit is generally designed upstream of the packaging position, in order to better meet the production rhythm of the cover body paper bag packaging and improve the packaging feeding efficiency, the feeding channel of the feeding frame comprises a rear feeding section and a front feeding section arranged in sequence from rear to front, the pushing mechanism comprises a first pushing assembly for pushing the stacked cover bodies along the rear feeding section to the front feeding section and a second pushing assembly for pushing the stacked cover bodies along the front feeding section to the guide channel and continuously pushing the stacked cover bodies along the guide channel into the paper bag at the packaging position.

[0015] In order to simplify the structure of the suction cup movement mechanism, realize the position transfer and posture adjustment (inclination angle adjustment) of the paper bag, the suction cup movement mechanism comprises a longitudinal movement mechanism, a transverse movement mechanism and a lifting movement mechanism. The longitudinal movement mechanism is arranged on the rack. The transverse movement mechanism is arranged on the power output end of the longitudinal movement mechanism. The lifting movement mechanism is arranged on the power output end of the transverse movement mechanism and can be driven by the transverse movement mechanism to reciprocate along the transverse direction. A rotary air cylinder is arranged on the power output end of the lifting movement mechanism, and a suction cup support connected to the power output end of the rotary air cylinder is arranged on the power output end of the lifting movement mechanism. The suction cup support can be driven by the rotary air cylinder to rotate around the axis extending in the transverse direction. The suction cup is arranged on the suction cup support and can be driven by the lifting movement mechanism to move upward after sucking the paper bag on the feeding platform. It is conceivable that the suction cup movement mechanism can also adopt a conventional six-axis manipulator, that is, the paper bag is transferred and the inclination angle is adjusted by driving the suction cup by the manipulator.

[0016] In order to open the bag opening of the paper bag in the up-down direction, a bag pressing clamp assembly is arranged on the rack or the feeding platform. The bag pressing clamp assembly comprises a bag pressing clamp and a bag pressing movement mechanism. The bag pressing clamp can be driven by the bag pressing movement mechanism to extend into the bag opening of the paper bag and press the lower side edge of the bag opening downward. Preferably, the bag pressing movement mechanism comprises a first linear movement mechanism and a second linear movement mechanism arranged on the power output end of the first linear movement mechanism. The bag pressing clamp can be arranged on the power output end of the second linear movement mechanism. The movement direction of the power output end of the first linear movement mechanism is parallel to the extension direction of the feeding channel. The movement direction of the power output end of the second linear movement mechanism is perpendicular to the movement direction of the power output end of the first linear movement mechanism.

[0017] Considering that the paper bag (especially after the cover is put into the paper bag) is in an inclined state, and the paper bag may be moved due to friction elimination when the feeding guide plate assembly is withdrawn after feeding is completed, therefore, a paper bag stop assembly is arranged at the packaging position of the rack. The paper bag stop assembly comprises a stop piece and a stop driving mechanism. The stop piece can be driven by the stop driving mechanism to move towards the position of the bag opening of the paper bag, and then resist the rear side of the bag opening edge of the paper bag.

[0018] In order to simplify the structure of the packaging device and ensure the sealing quality of the paper bag after the cover is put in, the packaging device comprises:

[0019] A pressing rod assembly includes a pressing rod and a pressing rod driving mechanism, the pressing rod extends along the width direction of the paper bag and can be driven by the pressing rod driving mechanism to press on the bag opening of the paper bag, the position of the paper bag pressed by the pressing rod is away from the bag opening edge of the paper bag, and the part of the paper bag from the bag opening edge of the paper bag to the position pressed by the pressing rod is recorded as a sealing part;

[0020] A sealing assembly includes a roller and a sealing driving mechanism, the roller is rotationally arranged on the power output end of the sealing driving mechanism and extends along the width direction of the paper bag, and the roller can be driven by the sealing driving mechanism to move from bottom to top, so as to act on the bottom of the sealing part of the paper bag and fold the sealing part upward;

[0021] A bag pressing assembly includes a pressing plate and a pressing plate driving mechanism, the pressing plate can be driven by the pressing plate driving mechanism to continue to fold the upwardly folded sealing part of the paper bag to adhere to the top of the main body of the paper bag.

[0022] Compared with the prior art, the advantages of the paper bag packaging equipment are as follows: the feeding channel adopts an inclined structure design, specifically gradually inclining upward along the forward direction of the cover body, so that the stacked cover bodies are not prone to tilting when being pushed forward by the pushing mechanism due to their own gravity, and the bag can be adjusted in posture after being sucked and moved to the packaging position by the suction disc feeding device, so that the stacked cover bodies on the feeding channel can be smoothly pushed into the paper bag, and the overall packaging efficiency of the paper bag packaging equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic view of the three-dimensional structure of the paper bag.

[0024] Figure 2 It is a schematic view of the three-dimensional structure of the paper bag packaging equipment of the embodiment of the utility model.

[0025] Figure 3 It is a left view of the paper bag packaging equipment of the embodiment of the utility model.

[0026] Figure 4 It is a schematic view of the three-dimensional structure of the counting device of the embodiment of the utility model.

[0027] Figure 5 It is a schematic view of the three-dimensional structure of the counting device of the embodiment of the utility model after some components are removed.

[0028] Figure 6 It is a schematic view of the three-dimensional structure of the counting device of the embodiment of the utility model from another angle after some components are removed.

[0029] Figure 7 It is a three-dimensional structure schematic view of the screw assembly of the embodiment of the utility model;

[0030] Figure 8 It is another angle three-dimensional structure schematic view of the screw assembly of the embodiment of the utility model;

[0031] Figure 9 It is the front view of the screw assembly of the embodiment of the utility model;

[0032] Figure 10 It is the left view of the screw assembly of the embodiment of the utility model;

[0033] Figure 11 It is a three-dimensional structure schematic view of the first pushing assembly of the embodiment of the utility model;

[0034] Figure 12 It is a three-dimensional structure schematic view of the packaging device of the paper bag packaging equipment of the embodiment of the utility model after relevant components are dispensed with, and the sealing part of the paper bag is not folded upward;

[0035] Figure 13 It is a three-dimensional structure schematic view of the packaging device of the paper bag packaging equipment of the embodiment of the utility model after relevant components are dispensed with, and the sealing part of the paper bag is folded upward by a certain angle;

[0036] Figure 14 It is the left view of the packaging device of the paper bag packaging equipment of the embodiment of the utility model after relevant components are dispensed with;

[0037] Figure 15 It is the opening process diagram of the feeding guide plate assembly of the paper bag packaging equipment of the embodiment of the utility model;

[0038] Figure 16 It is a three-dimensional structure schematic view of the bag pressing clamp assembly of the paper bag packaging equipment of the embodiment of the utility model;

[0039] Figure 17 It is a three-dimensional structure schematic view of the pressing rod assembly of the paper bag packaging equipment of the embodiment of the utility model;

[0040] Figure 18 It is the opening process diagram of the paper bag stopper assembly of the paper bag packaging equipment of the embodiment of the utility model;

[0041] Figure 19a It is a three-dimensional structure schematic view of the paper bag feeding device of the embodiment of the utility model;

[0042] Figure 19b It is another angle three-dimensional structure schematic view of the paper bag feeding device of the embodiment of the utility model;

[0043] Figure 20The utility model discloses a paper bag packaging equipment's suction cup subassembly's stereoscopic structure schematic view of embodiment;

[0044] Figure 21 The utility model discloses a paper bag packaging equipment's suction cup subassembly's left view of embodiment;

[0045] Figure 22 The utility model discloses a paper bag packaging equipment's material receiving device's stereoscopic structure schematic view of embodiment;

[0046] Figure 23 The utility model discloses a paper bag packaging equipment's material receiving device's left view of embodiment, and the bracket subassembly is in the inclined state;

[0047] Figure 24 The utility model discloses a paper bag packaging equipment's material receiving device's left view of embodiment, and the bracket subassembly is in the horizontal state;

[0048] Figure 25 It is Figure 23 The utility model discloses a paper bag packaging equipment's material receiving device's section view along the section of A-A direction;

[0049] Figure 26 The utility model discloses a paper bag packaging equipment's material receiving device's left view of embodiment, and the bracket subassembly is in the inclined state. DETAILED DESCRIPTION

[0050] In the description and claims of the utility model, directional terms are used, such as "front", "back", "up", "down", "left", "right", "side", "top", "bottom", etc., to describe various example structural parts and elements of the utility model, but these terms are used only for the convenience of description and are determined based on the example orientation shown in the drawings. Since the disclosed embodiments of the utility model can be arranged in different directions, these directional terms are only for description and should not be considered as limitation, for example, "up" and "down" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

[0051] Figures 1-26 A preferred embodiment of the paper bag packaging equipment of the utility model is shown. The paper bag packaging equipment includes a counting device, a feeding device, a packaging device, a paper bag feeding device and a material receiving device. The counting device is used for counting the cover b in the feeding process. After counting, the stack of cover b is pushed to the position of the packaging position 100 by the feeding device. The paper bag feeding device is used for moving the paper bag a from the paper bag placement area (i.e. the area position of the following conveying belt) to the position of the packaging position 100. The packaging device is used for sending the stacked cover b to the paper bag a in the packaging position 100, and sealing and packaging the paper bag a. After sealing and packaging, the paper bag a is discharged by the material receiving device.

[0052] Referring to Figure 1 and Figure 12 , in order to package a certain number of stacked caps b, the paper bag a is also substantially long strip-shaped, and the cross section of the paper bag a is also substantially circular after being fully opened or stretched, and the inner diameter is slightly larger than the outer diameter of the cap b, thereby ensuring that the stack of caps b can be smoothly loaded into the paper bag a, and the paper bag a after loading the caps b is more compact as a whole, and there is no problem of looseness and wrinkles.

[0053] Referring to Figure 19a and Figure 19b , the paper bag a is usually in a closed state before packaging, and the whole is also a compressed sheet, so a plurality of paper bags a can be stacked together to form a stack of paper bags a. The paper bag a is transferred to the packaging position 100 on the rack 10 by a paper bag feeding device. Specifically, the paper bag feeding device includes a feeding assembly and a suction cup assembly. The feeding assembly is arranged on the rack 10, and the rack 10 is a support frame which provides support for the feeding platform 41 and the suction cup assembly. Specifically, the feeding assembly can stack the paper bags a and transfer the paper bags a to the position adjacent to the packaging position 100 on the rack 10.

[0054] The feeding assembly includes a feeding drive mechanism and a conveying belt 91 driven to rotate circularly by the feeding drive mechanism. The vertically stacked paper bags a can be placed on the conveying belt 91. Specifically, in order to facilitate the placement of the paper bags a and avoid the problem of skewing or scattering of the stacked paper bags a during the conveying by the conveying belt 91, the conveying belt 91 has a plurality of partitions 911 extending outward from the conveying belt 91 and arranged in sequence along the length direction of the conveying belt 91, the extension direction of the partitions 911 is perpendicular to the conveying direction of the conveying belt 91, and the gap between two adjacent partitions 911 on the conveying belt 91 forms a storage compartment 910. One stack of paper bags a can be placed in each storage compartment 910. The side of the conveying belt 91 adjacent to the position of the suction cup 640 is referred to as the paper bag unloading side, and the side away from the position of the suction cup 640 is referred to as the paper bag loading side. The paper bags a stacked and placed on the conveying belt 91 are conveyed by the conveying belt 91 from the paper bag loading side to the paper bag unloading side.

[0055] The feeding drive mechanism of the present embodiment includes a second feeding drive motor 901 and two feeding rollers 902 arranged in parallel and spaced apart in the transverse direction. The conveying belt 91 is arranged around the two feeding rollers 902 and is driven to rotate by the conveying rollers 902. The second feeding drive motor 901 is connected in transmission with one of the feeding rollers 902 through a gear transmission mechanism, a belt transmission mechanism or a chain transmission mechanism, thereby driving the conveying belt 91 to rotate circularly. Among them, one of the feeding rollers 902 connected in transmission with the second feeding drive motor 901 is the driving roller, and the other feeding roller is the driven roller.

[0056] In order to accurately define the placement position of the paper bag a on the conveying belt 91, so as to ensure that the paper bag a on the conveying belt 91 can be effectively sucked by the suction plate 640, the rack 10 is further provided with a limiting plate 92 and a pushing plate assembly, wherein the limiting plate 92 is located at one side of the conveying belt 91 in the width direction and is vertically arranged. The pushing plate assembly is located above the conveying belt 91 and includes a rotating rod 94 extending in the transverse direction and a plurality of push plates 93 arranged in sequence along the length direction of the rotating rod 94. Each push plate 93 corresponds to each storage compartment 910 on the conveying belt 91. When the rotating rod 94 is rotated by the second rotary driving mechanism 95, each push plate 93 rotates with the rotating rod 94, so as to push the paper bag a placed in each storage compartment 910 towards the side where the limiting plate 92 is located, until the side of the paper bag a in each storage compartment 910 abuts against the limiting plate 92. After the paper bag a is moved into position, the second rotary driving mechanism 95 drives the rotating rod 94 and the push rod to rotate reversely (i.e. upward), so as to move each push plate 93 away from the corresponding storage compartment 910. In this way, when the conveying belt 91 is conveying, the partition plate 911 on the conveying belt 91 will not interfere with the push plate 93. After a stack of paper bags a in the storage compartment 910 on the discharge side of the conveying belt 91 are sucked away, the conveying belt 91 moves a stack of paper bags a in the next storage compartment 910 to the discharge side position, so as to be taken by the suction plate assembly at the fixed position.

[0057] The rack 10 is provided with a plurality of suspension rods 15 above the conveying belt 91, and the limiting plate 92 is fixed on each suspension rod 15. The pushing plate assembly is arranged on a fixed plate 942 which is parallel to the limiting plate 92 and is also fixed on each suspension rod 15.

[0058] Generally, the second rotary driving mechanism 95 can be a driving motor or a linear driving cylinder. When a driving motor is used, the driving motor can be directly connected to the rotating rod 94 or indirectly connected to the rotating rod 94 through other transmission assemblies (such as a gear assembly, a chain wheel assembly or a belt transmission assembly). In the preferred embodiment, the second rotary driving mechanism 95 includes a first linear driving cylinder and a swing arm 941 connected to the rotating rod 94, wherein the main body of the first linear driving cylinder is rotationally connected to the rack 10 at the end portion away from the output end of the first linear driving cylinder, and the output end of the first linear driving cylinder is rotationally connected to the swing arm 941. When the first linear driving cylinder is extended or retracted, the swing arm 941 drives the rotating rod 94 and each push plate 93 on the rotating rod 94 to rotate.

[0059] Referring to Figure 20 and Figure 21, the suction cup assembly includes a suction cup 640 for sucking the paper bag a placed on the feeding assembly (specifically, the conveying belt 91) and a suction cup moving mechanism for driving the suction cup 640 to move. The suction cup moving mechanism includes a longitudinal moving mechanism, a transverse moving mechanism and a lifting moving mechanism. The longitudinal moving mechanism is arranged on the frame 10, specifically, the frame 10 includes two longitudinally extending trusses and a sliding frame 610 arranged between the two trusses in the transverse direction, the longitudinal moving mechanism includes a longitudinal moving cylinder 61, the sliding frame 610 is driven by the longitudinal moving cylinder 61 to reciprocate along the trusses, and the longitudinal moving cylinder 61 can be a conventional rodless cylinder. The above-mentioned "longitudinal direction" is consistent with the width direction of the conveying belt 91, and the "transverse direction" is consistent with the conveying direction of the conveying belt 91. The transverse moving mechanism is arranged on the power output end of the longitudinal moving mechanism, specifically, the transverse moving mechanism is a transverse moving cylinder 62, which can also be a rodless cylinder and is arranged on the sliding frame 610. A first fixed plate 942 is arranged on the output end of the transverse moving cylinder 62, and the lifting moving mechanism is arranged on the power output end of the transverse moving mechanism and can be driven by the transverse moving mechanism to reciprocate in the transverse direction. Specifically, the lifting moving mechanism includes a lifting cylinder and a second fixed plate 942 arranged on the output end of the lifting cylinder, wherein the lifting cylinder is arranged on the first fixed plate 942. A rotary cylinder 632 is arranged on the second fixed plate 942 of the output end of the lifting cylinder, a suction cup support 641 is arranged on the power output end of the rotary cylinder 632, the suction cup support 641 includes four downwardly extending support rods 642, and the bottom ends of the four support rods 642 are each provided with a suction cup 640. The paper bag a in the flat state is a quadrilateral structure, and the positions of the four suction cups 640 can correspond to the positions of the four corners of the flat paper bag a. The suction cup support 641 can be driven by the rotary cylinder 632 to rotate around the axis extending in the transverse direction, so as to adjust the posture of the suctioned paper bag a to a suitable inclination angle, thereby facilitating the cover b stacked upstream to enter the paper bag a. The above-mentioned suction cup 640 can use a negative pressure generator or a vacuum system to provide negative pressure, and a sealing mechanism is used to maintain the stability of the negative pressure. The suction cup 640 cooperates with the suction cup moving mechanism to enable the suction cup 640 to stably suck and transfer the paper bag a to a fixed point.

[0060] When sucking the paper bag a on the conveying belt 91, the rotary cylinder 632 drives the suction cup support 641 to rotate, so that the four suction cups 640 are substantially in the same horizontal plane, and after sucking the paper bag a, the suction cup 640 can be driven by the lifting moving mechanism to move upward. The above-mentioned suction cup 640 moves upward after sucking the paper bag a, and due to the gravity of the paper bag a, the remaining paper bags a except the topmost one sucked by the suction cup 640 will not be easily taken out upward, thereby avoiding the waste of the paper bags a.

[0061] Referring to Figures 2-10 , the counting device of the paper bag packaging equipment includes a conveying frame 2, a feeding mechanism 22 and a counting unit.

[0062] The conveying frame 2 has a conveying passage 200 in which the cover bodies b are stacked and conveyed forward. The "forward" in the conveying passage 200 refers to the side adjacent to the outlet of the conveying passage 200 in the extending direction of the conveying passage 200, which is not limited to the conventional "forward-backward direction". For example, when a section of the conveying passage 200 extends vertically and the cover bodies b move downward from top to bottom, the "forward conveying" refers to downward conveying.

[0063] The feeding mechanism 22 is arranged on one side of the conveying frame 2 and can act on the cover bodies b in the conveying passage 200 to convey the cover bodies b forward along the conveying passage 200. Specifically, the feeding mechanism 22 includes a first feeding driving motor 221 and feeding wheels 222 driven to rotate by the first feeding driving motor 221. The feeding wheels 222 are two, arranged on both sides of the conveying passage 200 and in contact with the outer peripheral edges of the stacked cover bodies b in the conveying passage 200, which can drive the cover bodies b to convey forward when the feeding wheels 222 rotate. The first feeding driving motor 221 can drive the two feeding wheels 222 to rotate through a gear transmission assembly, a belt transmission assembly or a chain transmission assembly, wherein the rotation directions of the feeding wheels 222 arranged on both sides of the conveying passage 200 are opposite.

[0064] The conveying passage 200 of the conveying frame 2 includes a first passage section 201, an intermediate passage section 202 and a second passage section 203 connected in sequence along the conveying direction. The first passage section 201 extends horizontally or gradually inclines downward from back to front, and preferably has a structure designed to gradually incline downward from back to front. The intermediate passage section 202 extends vertically, and the cover bodies b are automatically stacked together under the action of their own gravity after being conveyed to the intermediate passage section 202. The second passage section 203 extends horizontally or gradually inclines upward from back to front, and preferably has a structure designed to gradually incline upward from back to front.

[0065] The two feeding wheels 222 of the feeding device are arranged on both sides of the intermediate passage section 202, which can drive the cover bodies b in the intermediate passage section 202 to convey downward. Since the cover bodies b in the intermediate passage section 202 are vertically stacked and always in close contact, the feeding wheels 222 can continuously apply a downward pushing force to the cover bodies b when rotating, which ensures the stability of the cover body b feeding and the accuracy of the cover body b counting.

[0066] In order to simplify the structure of the conveying frame 2, the conveying frame 2 includes at least three limiting ribs 20 arranged in sequence along the circumference of the cover bodies b, such as Figure 4As shown, four limiting ribs 20 are shown, and the inner space defined by the four limiting ribs 20 constitutes the conveying channel 200. The conveying channel 200 defined by the limiting ribs also has corresponding gaps reserved for the feeding mechanism 22 outside the conveying channel 200 to act on the cap b in the conveying channel 200, so that the cap b is conveyed forward. In the curved conveying channel 200, each limiting rib 20 is also designed as a corresponding curved structure.

[0067] The stand 10 is provided with a vertical plate 11 having a through hole for the cap b to pass through, and the end portions of the four limiting ribs 20 are connected to the outer peripheral edge of the through hole.

[0068] The counting unit includes a screw assembly, a screw driving mechanism, and a rotary encoder 13. The screw assembly includes two spaced-apart screws 3 through which the cap b can pass, and the screw driving mechanism is drivingly connected to the two screws 3 to synchronously rotate the two screws 3. The outer peripheral wall of each screw 3 is provided with a rotation groove for limiting the outer peripheral edge of the cap b therein, and the rotation grooves of the two screws 3 are configured such that only one cap b can pass between the two screws 3 during one rotation of the two screws 3. Specifically, the rotation groove 30 on the screw 3 has a groove entrance 301 for the outer peripheral edge of the cap b to enter the rotation groove 30 and a groove exit 302 for the cap b in the rotation groove 30 to move out, and the groove entrance 301 and the groove exit 302 are located at an angle α (30° < α < 180°) with respect to the center axis of the screw 3 in the circumferential direction. The rotation groove has the above structure, which can ensure that the next cap b just enters the groove entrance 301 of the rotation groove of the screw 3 when the previous cap b has moved out of the groove exit 302 of the rotation groove, thereby ensuring that only one cap b can pass between the two screws 3 during one rotation of the two screws 3, and improving the accuracy of counting and detecting the cap b. The rotary encoder 13 can directly or indirectly measure the number of rotations of one of the screws 3 to achieve the purpose of counting the cap b passing between the two screws 3.

[0069] The two screws 3 are rotatably arranged on the vertical plate 11. The screw driving mechanism comprises a screw driving motor 32 and two belt driving assemblies 33 connected with the output shaft of the screw driving motor 32. The two belt driving assemblies 33 are respectively corresponding to the two screws 3. Specifically, each belt driving assembly 33 comprises at least two first pulleys 331 rotatably arranged on the vertical plate 11 and a first transmission belt arranged between the corresponding two first pulleys 331. The vertical plate 11 is further provided with two second pulleys 332 coaxially connected with the two screws 3, respectively, and a second transmission belt 333 is arranged between one of the first pulleys 331 of the belt driving assembly 33 and the second pulley 332. The second pulley 332 mentioned above is connected with the screw 3 through a connecting shaft 31 rotatably arranged on the vertical plate 11, and the second pulley 332 and the screw 3 are located on the front and rear sides of the vertical plate 11, respectively.

[0070] Generally, the rotation axis of the rotary encoder 13 can be directly connected with the screw 3 through the shaft coupling 131, or can be connected with the first pulley 331 of the belt driving assembly 33. The above can realize direct or indirect measurement of the rotation number of one of the screws 3, and further achieve the purpose of counting the cover b passing through the gap between the two screws 3, see Figure 5 In the preferred embodiment, the vertical plate 11 is further provided with a fixing bracket 12 for fixing the rotary encoder 13, which is arranged adjacent to one of the first pulleys 331 of the belt driving assembly 33, wherein the rotation axis of the rotary encoder 13 is connected with the first pulley 331 through the shaft coupling 131. The outer diameter of the first pulley 331 and the outer diameter of the second pulley 332 are preferably designed as equal diameters, so that the rotation number of the first pulley 331 is the same as the rotation number of the second pulley 332. Of course, the first pulley 331 and the second pulley 332 can also be designed as non-equal diameters, and the rotation angle or number between the two can be obtained through corresponding proportional conversion.

[0071] The two screws 3 are arranged at the position of the outlet of the second channel segment 203. In some embodiments, the two screws 3 are arranged in an up-down interval, and correspondingly, the outlet of the second channel segment 203 is provided with two arc-shaped limiting plates 9221 arranged oppositely, the concave portions of the two arc-shaped limiting plates 9221 are opposite to each other to define a counting channel 211 connected with the conveying channel 200, and the two arc-shaped limiting plates 9221 are provided with a gap 210, and the portions of the two screws 3 can correspondingly extend into the counting channel 211 to realize the conveying of the cover b in the counting channel 211.

[0072] The second channel section 203 of the embodiment is designed to gradually incline upward from back to front, so that the cover body b is always in close contact during the forward conveying in the conveying channel 200, and on this basis, the two screw rods 3 are arranged at the end outlet of the second channel section 203, so as to ensure that the cover body b can pass through the two screw rods 3 in sequence, and the problem of missing or subsequent cover body b not catching up can be avoided.

[0073] Considering that the number of rotations of one of the screw rods 3 is directly or indirectly measured by the rotary encoder 13 to realize the counting of the cover body b passing through the gap between the two screw rods 3, the problem of inaccurate counting caused by the cover body b not conveying to the position may occur, and in a further preferred embodiment, the counting unit further comprises an infrared sensor (not shown in the figure) for detecting the number of cover bodies b passing between the two screw rods 3. The rotary encoder 13 may have the problem of pulse loss or miscounting under high-speed rotation or mechanical vibration. The infrared sensor can be used as an auxiliary counting means to check and supplement the counting of the rotary encoder 13. The infrared sensor can detect the number of cover bodies b passing through to timely discover and correct the counting error of the rotary encoder 13.

[0074] The cover body b is conveyed forward by the synchronously rotating screw rods 3, wherein the rotation grooves 30 of the two screw rods 3 are each configured to allow only one cover body b to pass between the two screw rods 3 during one rotation of the two screw rods 3, and on this basis, the number of rotations of one of the screw rods 3 is directly or indirectly measured by the rotary encoder 13 to realize the counting of the cover body b passing through the gap between the two screw rods 3. The structure design of the above-mentioned counting unit enables each cover body b to quickly separate from the rotation groove 30 of the screw rod 3 after entering the rotation groove 30 of the screw rod 3, greatly shortening the conveying and counting time of the cover body b, improving the counting and conveying efficiency, and on the other hand, since the conveying time of each cover body b through the screw rod 3 is shortened, the problem of cover body b being scratched or squeezed during conveying is also effectively avoided.

[0075] The counted stack of cover bodies b is sent to the packaging position 100 of the rack 10 by the cover body loading device, loaded into the paper bag a placed at the packaging position 100, and then the paper bag a is sealed by the packaging device.

[0076] Referring to Figure 2 , Figure 4 and Figure 11The cover body feeding device comprises a feeding frame 4 and a pushing mechanism. The feeding frame 4 is provided with a feeding channel 40, and the pushing mechanism can act on the cover bodies b stacked and placed on the feeding channel 40 and push the cover bodies b forward along the feeding channel 40. In the embodiment, the feeding channel 40 is gradually inclined upward along the forward direction of the cover bodies b. In order to realize the inclined structure design of the feeding channel 40, the rack 10 is provided with a feeding platform 41, wherein the feeding platform 41 has a first end adjacent to the packaging position 100 and a second end away from the packaging position 100, and the height position of the first end of the feeding platform 41 is higher than that of the second end of the feeding platform 41. The feeding frame 4 is arranged on the feeding platform 41, and the extension direction of the feeding frame 4 is parallel to the extension direction of the feeding platform 41. In order to flexibly adjust the inclination angle of the feeding platform 41 (the feeding channel 40) to adapt to the pushing needs of cover bodies b of different sizes, the rack 10 is provided with a first height adjusting lever assembly 42 corresponding to the first end of the feeding platform 41 and a second height adjusting lever assembly 43 corresponding to the second end of the feeding platform 41. The first height adjusting lever assembly 42 can be used to support the bottom of the first end of the feeding platform 41 and can adjust the height of the first end of the feeding platform 41, and the second height adjusting lever assembly 43 can be used to support the bottom of the second end of the feeding platform 41 and can adjust the height of the second end of the feeding platform 41. The first height adjusting lever assembly 42 comprises two vertically extending first lead screws 421, and the two first lead screws 421 are arranged in the width direction of the feeding platform 41. The first support plate 141 is arranged below the first end of the feeding platform 41 on the rack 10, and the two first lead screws 421 are threadedly connected with the first support plate 141. The lower end of the first lead screw 421 is provided with a first operation handle 422 for rotating the lead screw, and the upper end of the first lead screw is hingedly connected with the bottom of the feeding platform 41. The operator can rotate the first lead screw 421 by operating the first operation handle 422, so as to realize the lifting of the first lead screw 421, and then achieve the purpose of adjusting the height of the first end of the feeding platform 41. Similarly, the second height adjusting lever assembly 43 comprises two vertically extending second lead screws 431, and the two second lead screws 431 are arranged in the width direction of the feeding platform 41. The second support plate 142 is arranged below the second end of the feeding platform 41 on the rack 10, and the two second lead screws 431 are threadedly connected with the second support plate 142. The lower end of the second lead screw 431 is provided with a second operation handle 432 for rotating the lead screw, and the upper end of the second lead screw is hingedly connected with the bottom of the feeding platform 41. The operator can rotate the second lead screw 431 by operating the second operation handle 432, so as to realize the lifting of the second lead screw 431, and then achieve the purpose of adjusting the height of the second end of the feeding platform 41.

[0077] The paper bag a transported to the packaging position 100 is adjusted in posture by the suction cup moving mechanism to be in a loading state, wherein the loading state is that the opening of the paper bag a faces the side where the outlet of the feeding passage 40 is located, and the paper bag a is gradually inclined upward from the opening position to the bottom position of the bag. Specifically, the inclined direction of the paper bag a is consistent with the extending direction of the stack of cover bodies b stacked on the feeding rack 4.

[0078] Referring to Figures 11-15, the support rod assembly 80 is further provided at the packing position 100 of the rack 10, and the bagging process of the stack of covers b pushed to the packing position 100 and the sealing operation after the bagging is completed are all completed on the support rod assembly 80. Specifically, when the paper bag a is driven upward by the suction cup movement mechanism and is moved to the support rod assembly 80 of the packing position 100, at least the lower side edge of the opening position of the paper bag a is in a suspended state due to the gravity of the paper bag a, that is, the opening of the paper bag a is in a "half-open" state. In order to facilitate the further opening of the paper bag a in the "half-open state" and push the stack of covers b into the paper bag a, the outlet of the feeding channel 40 of the feeding rack 4 is further provided with a feeding guide plate assembly 5 for receiving the stack of covers b pushed from the feeding channel 40 and moving the stack of covers b into the paper bag a at the packing position 100. The feeding guide plate assembly 5 includes two guide pieces 51 extending along the feeding direction of the stack of covers b and oppositely arranged at both sides of the outlet of the feeding channel 40, a guide channel 510 is formed between the two guide pieces 51 for the covers b to pass through, and the first ends of the two guide pieces 51 form the inlet of the guide channel 510 and the second ends form the outlet of the guide channel 510. The feeding guide plate assembly 5 as a whole can reciprocate in a direction parallel to the extension direction of the feeding channel 40, so as to move the received stack of covers b pushed from the feeding channel 40 to the position of the paper bag a at the packing position 100, and after the feeding guide plate assembly 5 is moved to the position, the end where the outlet is located extends into the paper bag a. The stack of covers b in the guide channel 510 is pushed by a pushing mechanism and moves along the guide channel 510 until the stack of covers b is completely in the paper bag a. The specific structure and working process of the pushing mechanism are described in detail below. The feeding guide plate assembly 5 of the embodiment further includes a mounting seat 52 for mounting the guide pieces 51 and a feeding driving mechanism 54 for driving the mounting seat 52 to move forward and backward. The two guide pieces 51 are rotatably mounted on the mounting seat 52 through rotating pins 521, and the rotation axis 82 of the rotating pins 521 is vertically extended. The mounting seat 52 is further provided with spring baffles 53 at positions left and right of the two guide pieces 51, and springs (not shown in the figure) are arranged between the two spring baffles 53 and the corresponding guide pieces 51. In the natural state, the distance between the second ends of the two guide pieces 51 is smaller than the distance between the first ends under the elastic force of the two springs, so as to correspondingly make the opening degree of the outlet smaller than the opening degree of the inlet. During the movement of the stack of covers b along the guide channel 510 driven by the pushing mechanism, the stack of covers b can act on the second ends of the two guide pieces 51 (overcoming the elastic force of the springs) and the end where the outlet of the two guide pieces 51 is located is away from each other, thereby opening the bag opening, so as to allow the stack of covers b in the guide channel 510 to enter the paper bag a and complete the bagging operation. After the stack of covers b in the guide channel 510 is moved into the paper bag a, the second ends of the two guide pieces 51 are restored to the state of being close to each other under the elastic force of the springs.The rotation structure of the guide fin 51 and the matching arrangement with the spring can facilitate the corresponding end of the feeding guide plate assembly 5 to extend into the paper bag a and make the cover b smoothly separate from the feeding guide plate assembly 5 and enter the paper bag a.

[0079] In combination Figure 3 , considering that a corresponding cover b counting unit is generally also designed upstream of the packaging position 100, in order to better meet the production rhythm of the cover b paper bag a packaging and improve the packaging feeding efficiency, the feeding channel 40 of the feeding rack 4 of the embodiment comprises a rear feeding section 402 and a front feeding section 401 arranged in sequence from rear to front, and the feeding mechanism comprises a first feeding assembly 441 for pushing the stacked cover b along the rear feeding section 402 to the front feeding section 401 and a second feeding assembly 442 for pushing the stacked cover b along the front feeding section 401 to the guide channel 510 and continuing to push along the guide channel 510 to the paper bag a at the packaging position 100. Specifically, the first feeding assembly 441 comprises a first rodless air cylinder 4411 arranged on the feeding platform 41, the first rodless air cylinder 4411 is located below the feeding rack 4, and the extension direction of the first rodless air cylinder 4411 is consistent with the extension direction of the feeding rack 4. The slider of the first rodless air cylinder 4411 is provided with second transverse air cylinders 4412 arranged in pairs and spaced apart on the left and right sides, the power output shafts of the two second transverse air cylinders 4412 are each provided with a feeding plate 4413, and the two feeding plates 4413 are respectively located on the left and right sides of the feeding rack 4 and can approach or move away from each other (in the left-right direction) under the action of the corresponding second transverse air cylinder 4412. The two sides of the two feeding plates 4413 have oppositely extending wedge-shaped inserts 44130, when the two feeding plates 4413 approach each other and move to the set position, the wedge-shaped inserts 44130 of the two feeding plates 4413 can act on the rear side of the left and right edges of the stacked cover b in the extension direction of the feeding rack 4, and then when the first rodless air cylinder 4411 acts, the two feeding plates 4413 can drive the stacked cover b to be pushed along the rear feeding section 402 of the feeding channel 40 to the front feeding section 401.

[0080] The second pushing assembly 442 comprises a second rodless cylinder 4421, a second lifting cylinder 4422 arranged on the sliding block of the second rodless cylinder 4421, and a pushing rod 4423 arranged on the power output end of the second lifting cylinder 4422. Specifically, the second pushing assembly 442 comprises a second support frame 411 arranged on the feeding platform 41, and the second rodless cylinder 4421 is arranged on the second support frame 411 and located above the feeding frame 4. The pushing rod 4423 is located directly above the feeding channel 40 of the feeding frame 4, and the extension direction of the pushing rod 4423 is consistent with the extension direction of the feeding frame 4. The second lifting cylinder 4422 extends vertically, and the first end of the pushing rod 4423 is connected to the output end of the lower end of the second lifting cylinder 4422. When the first lifting cylinder 891 moves to the set position, the pushing rod 4423 is located at the position of the feeding channel 40, and the second end of the pushing rod 4423 is located at the rear side of the stacked cover b of the feeding channel 40. Under the action of the second rodless cylinder 4421, the second end of the pushing rod 4423 acts on the middle area of the last cover b of the stacked cover b, and pushes the stacked cover b to move forward along the front feeding section 401 of the feeding channel 40. After the pushing action of the pushing rod 4423 is completed, the second lifting cylinder 4422 is driven to move upward, thereby providing space for the pushing action of the first pushing assembly 441. Since the pushing rod 4423 is a rod body, the second end thereof acts on the middle area of the cover b, and the two pushing plates 4413 of the first pushing assembly act on the left and right side edges of the cover b, so that, after the stacked cover b is pushed to the front feeding section 401 by the pushing plates 4413 of the first pushing assembly 441, the pushing rod 4423 of the second pushing assembly 442 can be abutted against the rear side of the stacked cover b, that is, the first pushing assembly 441 and the second pushing assembly 442 can be better connected and matched, without interference, thereby ensuring the stability of the pushing process of the stacked cover b.

[0081] Referring to Figure 14 and Figure 16, considering that the degree of the "half-open state" of the bag opening of the paper bag a will be different only by the dead weight of the paper bag a, and the situation that the requirement of inserting the bag opening of the paper bag a by the feeding guide plate assembly 5 cannot be met can occur, therefore, the rack 10 or the feeding platform 41 is further provided with a bag pressing clamp assembly, specifically, the bag pressing clamp assembly comprises a bag pressing clamp 71 and a bag pressing movement mechanism 72, the bag pressing clamp 71 can be driven by the bag pressing movement mechanism 72 to extend into the bag opening of the paper bag a and press the lower side edge of the bag opening downward. In some embodiments, the bag pressing movement mechanism 72 comprises a first linear movement mechanism 721 and a second linear movement mechanism 722, a connecting plate 723 is arranged on the power output end of the first linear movement mechanism 721, the second linear movement mechanism 722 is installed on the connecting plate 723, and the bag pressing clamp 71 is arranged on the power output end of the second linear movement mechanism 722. The movement direction of the power output end of the first linear movement mechanism 721 is parallel to the extension direction of the feeding channel 40, the movement direction of the power output end of the second linear movement mechanism 722 is perpendicular to the movement direction of the power output end of the first linear movement mechanism 721, and considering that the extension direction of the feeding channel 40 is inclined relative to the horizontal direction, therefore, the movement direction of the power output end of the second linear movement mechanism 722 is also inclined relative to the vertical direction. Specifically, the first linear movement mechanism 721 and the second linear movement mechanism 722 can all adopt movement mechanisms such as air cylinders and electric push rods.

[0082] When the paper bag a is driven upward by the suction cup movement mechanism and moves to the support rod of the packaging position 100, at least the lower side edge of the opening position of the paper bag a is in a suspended state due to the gravity of the paper bag a, that is, the opening of the paper bag a is in a "half-open" state, then the bag pressing clamp assembly acts, the bag pressing clamp 71 is driven by the bag pressing movement mechanism 72 to extend into the bag opening of the paper bag a and press the lower side edge of the bag opening downward, so that the opening of the paper bag a can always remain in a "half-open" state or a relatively large open state, which can facilitate the insertion of the second end of the feeding guide plate assembly 5 into the paper bag a, continue to open the paper bag a and push the stacked cover bodies b into the paper bag a.

[0083] In order to make the paper bag a completely open as a whole, so that the stacked cover bodies b are smoothly pushed into the paper bag a, the rack 10 is further provided with a blowing device (not shown in the figure), which comprises a blowing pipe connected with an external air source, and the air outlet of the blowing pipe faces the bag opening of the paper bag a. In the process of the cover bodies b entering the paper bag a, the blowing pipe can blow air into the paper bag a, so that the paper bag a is fully inflated. A corresponding electromagnetic valve can be arranged on the communication path of the blowing pipe and the external air source to control the opening and closing of the air path.

[0084] Referring to Figure 14In the process of entering the second end of the feeding guide plate assembly 5 into the paper bag a, considering that the paper bag a can be moved forward due to the feeding guide plate assembly 5, the front end of the support rod assembly 80 is further provided with a blocking rod assembly, which includes a blocking piece 961 and a blocking driving mechanism 962 for driving the blocking piece 961 to move along the extension direction of the support rod. The blocking driving mechanism 962 can be a blocking driving cylinder, which is fixed relative to the rack 10. The blocking piece 961 is a cylinder, which is arranged on the output shaft of the blocking driving cylinder and can resist the front side of the paper bag a (i.e. the bottom position of the paper bag a). When the number of cover bodies b to be packaged is different, the length of the paper bag a required is also different. For paper bags a of different sizes, the blocking piece 961 can be moved by the blocking driving cylinder to adjust to a position suitable for the corresponding size of the paper bag a.

[0085] Referring to Figure 12 and Figure 18 , considering that the paper bag a (especially after the cover body b is loaded into the paper bag a) is in an inclined state, and the feeding guide plate assembly 5 can move the paper bag a due to friction removal when it is withdrawn after feeding is completed, the rack 10 is further provided with a paper bag stop assembly at the packaging position 100. The paper bag stop assembly includes a stop piece 741 and a stop driving mechanism 742. The stop piece 741 can be driven by the stop driving mechanism 742 to move towards the position of the bag opening of the paper bag a, and then resist the rear side of the bag opening edge of the paper bag a. Specifically, the paper bag stop assembly is arranged on the left side or the right side of the paper bag a. Of course, it can also be two groups arranged on the left and right sides of the paper bag a. The stop driving mechanism 742 adopts a cylinder, and the main body of the cylinder is hinged to the rack 10. The stop piece 741 is in a strip shape, and the middle part of the stop piece 741 is rotatably arranged on the rack 10 (or a connecting rack arranged on the rack 10). The output end of the cylinder is rotatably connected with the first end of the stop piece 741, and the second end of the stop piece 741 serves as a stop portion for resisting the rear side of the bag opening edge of the paper bag a. When the cylinder is retracted, the stop piece 741 rotates in the opposite direction, and the second end of the stop piece 741 moves away from the bag opening of the paper bag a to make room.

[0086] Referring to Figures 12-14, the packaging device further comprises a pressing rod assembly and a sealing assembly. The pressing rod assembly is located above the paper bag a (the paper bag a in the packaging position 100) as a whole, and comprises a pressing rod 751 and a pressing rod 751 driving mechanism. The pressing rod 751 extends along the width direction of the paper bag a, and can be driven by the pressing rod 751 driving mechanism to press downward at the bag opening of the paper bag a. Specifically, the pressing rod 751 driving mechanism comprises a third linear motion mechanism 7521 and a fourth linear motion mechanism 7522 arranged at the power output end of the third linear motion mechanism 7521. The power output end of the third linear motion mechanism 7521 moves reciprocatingly along the left-right direction, and the power output end of the fourth linear motion mechanism 7522 moves reciprocatingly along the up-down direction. The pressing rod 751 is arranged on the power output end of the fourth linear motion mechanism 7522 and is driven by the fourth linear motion mechanism 7522 to move downward and press at the bag opening of the paper bag a. The position of the paper bag a pressed by the pressing rod 751 is a certain distance away from the bag opening edge of the paper bag a. The part of the paper bag a from the bag opening edge of the paper bag a to the position pressed by the pressing rod 751 is referred to as a sealing portion a1. The sealing portion a1 can be folded upward by the sealing assembly and pressed by the bag pressing assembly to adhere to the top of the main body of the paper bag a, thereby achieving the sealing purpose. Specifically, the sealing assembly comprises a roller 761 and a sealing driving mechanism. The sealing driving mechanism adopts a fifth linear motion mechanism 762. The main body of the fifth linear motion mechanism 762 is arranged at the bottom front side of the feeding platform 41, i.e. at the bottom rear side of the support rod assembly 80. When the power output end of the fifth linear motion mechanism 762 is stretched out, it is inclined to extend forward and upward. The roller 761 is rotatably arranged at the power output end of the sealing driving mechanism. The axis of the roller 761 extends along the width direction of the paper bag a. When the fifth linear motion mechanism 762 is stretched out, the roller 761 moves from bottom to top and acts on the bottom of the sealing portion a1 of the paper bag a, and folds the sealing portion a1 upward. The bag pressing assembly is arranged at the upper front side of the feeding platform 41, i.e. at the upper rear side of the support rod assembly 80, and comprises a pressing plate 771 and a pressing plate driving mechanism. The pressing plate driving mechanism comprises a sixth linear motion mechanism 772 and a seventh linear motion mechanism 773 arranged on the power output end of the sixth linear motion mechanism 772. Specifically, the sixth linear motion mechanism 772 extends vertically. The power output end of the sixth linear motion mechanism 772 is downwardly stretched out, and a second fixed frame 774 is arranged on the power output end. The main body of the seventh linear motion mechanism 773 is rotatably arranged on the second fixed frame 774. The pressing plate 771 is also rotatably arranged on the second fixed frame 774, and specifically can be rotatably connected to the second fixed frame 774 through a left-right extending pin shaft. The pressing plate 771 adopts an arc-shaped plate structure with an opening facing downward. The inner diameter of the arc-shaped plate is matched with the outer diameter of the paper bag a after the cover body b is arranged thereon. The power output end of the seventh linear motion mechanism 773 is rotatably connected to the back surface of the pressing plate 771.After the sealing part a1 of the paper bag a is folded upward to the position via the sealing assembly, the sixth linear motion mechanism 772 drives the seventh linear motion mechanism 773 and the pressing plate to move downward as a whole, and during the downward movement or after reaching the position, the lower pressing plate 771 is deflected downward relative to the fixed lower part driven by the seventh linear motion mechanism 773, so as to continue to fold the sealing part a1 of the paper bag a upward and adhere to the top of the main body of the paper bag a.

[0087] The third linear motion mechanism 7521, the fourth linear motion mechanism 7522, the fifth linear motion mechanism 762, the sixth linear motion mechanism 772, and the seventh linear motion mechanism 773 described above can all adopt a pneumatic cylinder or an electric push rod.

[0088] The paper bag a after the sealing and packaging is received by the material receiving device and is discharged.

[0089] Referring to Figures 22-26 , the material receiving device includes a support rod assembly 80, a discharging device, and a bracket device. The support rod assembly 80 is arranged at the position of the packaging position 100 of the rack 10 of the paper bag packaging equipment, and the paper bag a can be moved to the support rod assembly 80 and the paper bag a packaging of the cover b is completed on the support rod assembly 80. Specifically, the support rod assembly 80 of the embodiment includes two support rods 81 arranged side by side and spaced apart, and the extension direction of the two support rods 81 is consistent with the length direction of the paper bag a. The two support rods 81 can be driven by a first rotary drive mechanism 83 to move close to each other or away from each other, and when the two support rods 81 move close to each other to a set position, a support state of upwardly supporting the paper bag a can be maintained. It can be understood that in the support state, the spacing between the two support rods 81 is smaller than the outer diameter of the cover b, so that the paper bag a with the cover b can be placed thereon. After the paper bag a with the cover b is packaged, the two support rods 81 move away from each other, and the paper bag a falls downward from between the two support rods 81 to realize discharging.

[0090] The support rod assembly 80 further includes two rotating shafts 82 arranged side by side and each capable of rotating about its own axis, and a first rotary drive mechanism 83 for driving the two rotating shafts 82 to rotate. The two support rods 81 are parallel to the rotating shafts 82 and are respectively connected to the corresponding rotating shafts 82, wherein the support rod 81 and the rotating shaft 82 can be connected through a plurality of connecting rods 84 arranged in the length direction of the support rod 81 in sequence. The first rotary drive mechanism 83 includes two rotary cylinders 632, and the power output shafts of the two rotary cylinders 632 are respectively connected to the two rotating shafts 82 through a gear transmission mechanism, a belt transmission mechanism, or a chain transmission mechanism, so as to drive the two rotating shafts 82 to rotate in opposite directions, thereby realizing the mutual approach or mutual separation of the two support rods 81.

[0091] The unloading device is located below the support rod assembly, and includes an unloading driving mechanism and a roller assembly which can be driven to rotate circularly by the unloading driving mechanism. Generally, the roller assembly can adopt a conventional roller feeder in the prior art. Specifically, the unloading driving mechanism includes an unloading driving motor 85, and the roller assembly includes two groups of chain wheel mechanisms arranged side by side and a plurality of rolling cylinders 861 arranged in sequence and at intervals in the feeding direction, and the two groups of chain wheel mechanisms are arranged at both ends of the length direction of each rolling cylinder 861. Each group of chain wheel mechanisms includes two or more chain wheels 862 arranged in the conveying direction and a transmission chain 863 wound on the chain wheels 862. The two ends of each rolling cylinder 861 are connected to the transmission chains 863 of the two groups of chain wheel mechanisms respectively, and are driven to move by the transmission chains 863. The length direction of the rolling cylinder 861 is consistent with the length direction of the paper bag a with the cover b, and the spacing between the adjacent two rolling cylinders 861 is smaller than the outer diameter of the cover b, so that the paper bag a with the cover b can be supported by the adjacent two rolling cylinders 861 after falling.

[0092] The bracket device includes a bracket driving mechanism and a bracket assembly which can be driven to move up and down by the bracket driving mechanism. Specifically, the first fixed frame 87 is arranged on the rack 10 below the roller assembly, and the bracket driving mechanism includes a first lifting cylinder 891 arranged on the first fixed frame 87. The bracket assembly is in the shape of a long strip, and the length direction of the bracket assembly is consistent with the extension direction of the rolling cylinder 861. The middle part of the bracket assembly is connected to the power output end of the first lifting cylinder 891, and under the driving of the first lifting cylinder 891, the bracket assembly can move reciprocatingly in the up-down direction. Specifically, the width dimension of the bracket assembly is smaller than the gap between the adjacent two rolling cylinders 861, and the bracket assembly can pass through the gap between the adjacent two rolling cylinders 861 of the unloading device upward and approach the support rod 81, so as to receive the paper bag a falling from the support rod 81.

[0093] In consideration of the fact that the supporting rod 81 and the paper bag a placed thereon are in an inclined state, in order to adapt to this and to more stably receive the paper bag a, the bracket assembly comprises a bracket body 88 and a bracket support frame 880 located below the bracket body 88, both of which are long strips and have the same extending direction. The power output end of the first lifting cylinder 891 is connected to the middle part of the bracket support frame 880. The first end or the position adjacent to the first end of the bracket support frame 880 is rotationally connected to the bracket body 88 through a left-right extending pin shaft. The second end or the position adjacent to the second end of the bracket support frame 880 is provided with a third lifting cylinder 892, the power output end of which moves in the up-down direction and is also rotationally connected to the bracket body 88 through a left-right extending pin shaft. In addition, a sliding groove 883 extending along the length direction of the bracket body 88 is formed in the bracket body 88, and the pin shaft is slidingly limited in the sliding groove 883. The first end of the bracket support frame 880 corresponds to the bag opening of the paper bag a, and the second end corresponds to the bottom of the paper bag a. When receiving the material, the bracket assembly moves upwards through the gap between the adjacent two material rolling cylinders 861 of the discharging device to a position adjacent to the lower part of the supporting rod 81, and then, under the driving of the third lifting cylinder 892, the second end of the bracket body 88 is upwardly deflected relative to the bracket support frame 880 until the inclined direction thereof is basically consistent with the inclined direction of the supporting rod 81. Since the inclined directions of the two are consistent, the paper bag a is not easy to fall off from the bracket body 88 after falling onto the bracket body 88, thereby ensuring the stability of the material receiving.

[0094] After the paper bag a falls onto the bracket assembly, the bracket assembly is driven downwardly by the first lifting cylinder 891. During the downward movement, the bracket assembly can pass through the gap between the adjacent two material rolling cylinders 861 of the discharging device. When continuously moving downwardly after passing through the gap between the adjacent two material rolling cylinders 861 of the discharging device, the paper bag a with the cover b falls onto the two material rolling cylinders 861. After the paper bag a falls onto the rolling cylinder assembly, the rolling cylinder assembly is cyclically rotated to drive the paper bag a to move to the corresponding material receiving position, thereby realizing the transfer and material receiving of the paper bag a.

[0095] The bottom of the bracket support frame 880 is also provided with at least two downwardly extending guide rods 881, and the first fixed frame 87 is provided with guide holes through which the guide rods 881 pass. Specifically, the guide rods 881 of the embodiment have two, and the two guide rods 881 are respectively located on the two sides of the first lifting cylinder 891. After the two guide rods 881 are provided, the stability of the upward and downward movement of the bracket assembly can be effectively ensured. The bracket body 88 is defined with a top-open mounting groove, and the mounting groove is provided with a magnet 882 for attracting the paper bag a with the cover b. After the paper bag a with the cover b falls onto the bracket body 88 from the supporting rod, the paper bag a can be firmly attracted by the magnet 882, thereby avoiding the paper bag a from falling off from the bracket when falling onto the bracket.

[0096] The working process of the paper bag packaging device is as follows: including cover counting, paper bag transfer, cover bagging, sealing packaging and discharging operation and other steps. In the cover counting and conveying steps, the cover b is conveyed forward through the conveying passage 200 of the conveying frame 2, wherein the middle passage section 202 extends vertically, the covers b are tightly stacked under the action of gravity, and the forward conveying power is provided through the feeding wheel 222 of the feeding mechanism 22. Two synchronously rotating screw rods 3 are arranged at the end of the second passage section 203 of the conveying passage 200, the rotating grooves arranged on the screw rods 3 are designed to allow only one cover b to pass through per rotation, the number of covers b passing through is indirectly calculated by detecting the number of rotations of the screw rods 3 through the rotary encoder 13, and the counting accuracy is ensured. Of course, in this counting process, a conventional counting sensor such as an infrared sensor is also used as an auxiliary to check the counting result of the rotary encoder 13, so as to avoid errors caused by mechanical vibration or high-speed operation. When the cover b reaches the preset number, the stack of covers b that has completed counting enters the feeding passage 40 of the feeding device. The feeding mechanism includes a first feeding assembly 441 and a second feeding assembly 442. The first feeding assembly 441 (corresponding to the rear feeding section 402) pushes the cover b to the front feeding section 401 through a rodless cylinder, and the second feeding assembly 442 (corresponding to the front feeding section 401) pushes the cover b to the guide passage 510 of the feeding guide plate assembly 5 through the pushing rod 4423 against the middle part of the cover b along the inclined feeding passage 40. The two guide pieces 51 of the feeding guide plate assembly 5 form the guide passage 510, and after the stacked covers b enter the guide passage 510, the front end of the feeding guide plate assembly 5 is stretched into the paper bag a by the feeding driving mechanism 54. The second feeding mechanism of the feeding mechanism continues to act, and pushes the stacked covers b to move forward along the guide passage 510 and finally into the paper bag a, thereby completing the bagging action. During the bagging process, the lower side edge of the bag opening of the paper bag a is pressed down by the bag pressing clamp 71 of the bag pressing clamp assembly, and the air blowing pipe of the air blowing device blows air into the paper bag a, thereby ensuring that the bag opening is fully opened. Subsequently, the bag opening is pressed down by the pressing rod 751 of the packaging device, the sealing component folds the sealing part a1 of the paper bag a upward by a certain angle through the roller 761, and then the sealing part a1 of the paper bag a is further folded by the downward deflection of the lower deflection plate 771 driven by the bag pressing assembly, so as to be attached to the top of the main body of the paper bag a, thereby completing the sealing action. Finally, the bracket of the receiving device is lifted to be close to the paper bag a on the support rod assembly 80 under the driving of the bracket driving mechanism, the support rod assembly 80 is separated after the paper bag a is packaged, the paper bag a falls on the bracket, the magnet 882 on the bracket can effectively attract the paper bag a, thereby avoiding the paper bag a from being separated, and the bracket moves downward after receiving the paper bag a. During the downward movement, the bracket can pass through the gap between the adjacent two rolling cylinders 861 of the discharging device, and when continuing to move downward through the gap between the adjacent two rolling cylinders 861 of the discharging device, the paper bag a containing the cover b falls on the two rolling cylinders 861.After the paper bag a falls on the roller assembly, the cycle rotation of the roller assembly drives the paper bag a to move to the corresponding receiving position, realizing the transfer and receiving of the paper bag a.

Claims

1. A paper bag packaging apparatus, comprising: a frame (10) having a packaging position (100) at which a packaging device for sealingly packaging a paper bag loaded with a cover (b) is arranged; a cover feeding device comprising a feeding rack (4) having a feeding channel (40) formed thereon and a pushing mechanism capable of acting on the cover (b) stacked and placed on the feeding channel (40) and pushing the cover (b) forward along the feeding channel (40); characterized in that the feeding channel (40) is gradually inclined upward along the forward direction of the cover (b), and the frame (10) is further provided with a suction disc feeding device comprising a suction disc (640) and a suction disc moving mechanism, the suction disc (640) being capable of being driven by the suction disc moving mechanism to suck and move a paper bag from a paper bag placing area away from the packaging position (100) to the packaging position (100), and the paper bag moved to the packaging position (100) is capable of being adjusted in posture by the suction disc moving mechanism to be in a loading state: the opening of the paper bag faces the side where the outlet of the feeding channel (40) is located, and the paper bag is gradually inclined upward from the opening position to the bottom position.

2. The paper sack packaging apparatus according to claim 1, characterized by: The frame (10) is provided with a feeding platform (41), the feeding rack (4) is arranged on the feeding platform (41), and the feeding platform (41) has a first end adjacent to the packaging position (100) and a second end away from the packaging position (100), and the height position of the first end of the feeding platform (41) is higher than that of the second end of the feeding platform (41).

3. The paper sack packaging apparatus according to claim 2, characterized by: The frame (10) is provided with a first height adjusting rod assembly (42) corresponding to the first end of the feeding platform (41) for supporting the feeding platform (41) and capable of adjusting the height of the first end of the feeding platform (41), and the frame (10) is provided with a second height adjusting rod assembly (43) corresponding to the second end of the feeding platform (41) for supporting the feeding platform (41) and capable of adjusting the height of the second end of the feeding platform (41).

4. The paper sack packaging apparatus according to claim 2, characterized by: The outlet of the feeding channel (40) is also provided with a feeding guide plate assembly (5) for receiving the stacked caps (b) pushed from the feeding channel (40) and transferring the stacked caps (b) into the paper bag at the packaging position (100). The feeding guide plate assembly (5) includes two guide plates (51) arranged opposite to each other at both sides of the outlet of the feeding channel (40) and extending along the feeding direction of the stacked caps (b). The guide channel (510) for the caps (b) is formed between the two guide plates (51). The inlet of the guide channel (510) is formed between the first ends of the two guide plates (51), and the outlet of the guide channel (510) is formed between the second ends of the two guide plates (51). The outlet of the feeding guide plate assembly (5) can move towards the paper bag at the packaging position (100) and extend into the paper bag. During the movement of the caps (b) in the guide channel (510) driven by the feeding mechanism, the ends of the two guide plates (51) at the outlet can move away from each other to open the bag opening, thereby allowing the stacked caps (b) in the guide channel (510) to enter the paper bag.

5. The paper sack packaging apparatus according to claim 4, characterized by: The feeding guide plate assembly (5) further includes a mounting seat (52) for mounting the guide plates (51) and a feeding drive mechanism (54) for driving the mounting seat (52) to move forward and backward. The adjacent middle portions of the two guide plates (51) are rotatably mounted on the mounting seat (52) with the rotation axes (82) extending vertically. In the natural state, the distance between the second ends of the two guide plates (51) is smaller than the distance between the first ends, so that the opening of the outlet is smaller than the opening of the inlet.

6. The paper sack packaging apparatus according to claim 4, characterized by: The feeding channel (40) of the feeding frame (4) includes a rear feeding section (402) and a front feeding section (401) arranged in sequence from rear to front. The feeding mechanism includes a first feeding assembly (441) for pushing the stacked caps (b) along the rear feeding section (402) to the front feeding section (401), and a second feeding assembly (442) for pushing the stacked caps (b) along the front feeding section (401) to the guide channel (510) and further to the paper bag at the packaging position (100).

7. The paper sack packaging apparatus according to any one of claims 2 to 6, characterized by: The suction cup moving mechanism comprises a longitudinal moving mechanism, a transverse moving mechanism and a lifting moving mechanism, the longitudinal moving mechanism is arranged on the rack (10), the transverse moving mechanism is arranged on the power output end of the longitudinal moving mechanism, the lifting moving mechanism is arranged on the power output end of the transverse moving mechanism and can be driven by the transverse moving mechanism to reciprocate in the transverse direction, a rotary air cylinder (632) is further arranged on the power output end of the lifting moving mechanism, and a suction cup support (64) connected to the power output end of the rotary air cylinder (632) is further arranged; the suction cup support (64) can be driven by the rotary air cylinder (632) to rotate around an axis extending in the transverse direction; and the suction cup (640) is arranged on the suction cup support (64) and can be driven by the lifting moving mechanism to move upward after sucking the paper bag on the feeding platform (41).

8. The paper sack packaging apparatus according to claim 7, characterized by: A bag pressing clamp assembly is further arranged on the rack (10) or the feeding platform (41), the bag pressing clamp assembly comprises a bag pressing clamp (71) and a bag pressing moving mechanism (72), the bag pressing clamp (71) can be driven by the bag pressing moving mechanism (72) to extend into the bag opening of the paper bag and press the lower side edge of the bag opening downward.

9. The paper sack packaging apparatus according to any one of claims 1 to 6, characterized by: A paper bag stop component is further arranged at the packaging position (100) of the rack (10), the paper bag stop component comprises a stop piece (741) and a stop driving mechanism (742), the stop piece (741) can be driven by the stop driving mechanism (742) to move toward the position of the bag opening of the paper bag and then stop at the rear side of the bag opening edge of the paper bag.

10. The paper sack packaging apparatus according to any one of claims 1 to 6, characterized by: The packaging device comprises: A pressing rod assembly comprising a pressing rod (751) and a pressing rod driving mechanism, the pressing rod (751) extends in the width direction of the paper bag and can be driven by the pressing rod driving mechanism to press the bag opening of the paper bag downward, the position of the paper bag pressed by the pressing rod (751) is a certain distance away from the bag opening edge of the paper bag, and the part of the paper bag from the bag opening edge to the position pressed by the pressing rod (751) is referred to as a sealing part (a1); A sealing assembly comprising a roller (761) and a sealing driving mechanism, the roller (761) is rotationally arranged on the power output end of the sealing driving mechanism and extends in the width direction of the paper bag, the roller (761) can be driven by the sealing driving mechanism to move from bottom to top, so as to act on the bottom of the sealing part (a1) of the paper bag and fold the sealing part (a1) upward; A bag pressing assembly comprising a pressing plate (771) and a pressing plate driving mechanism, the pressing plate (771) can be driven by the pressing plate driving mechanism, so as to continue to fold the upwardly folded sealing part (a1) of the paper bag to adhere to the top of the main body of the paper bag.

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