A paper bag packaging machine

Abstract

The present invention relates to a paper bag packaging machine, wherein a feeding device is upstream of a processing position, a suction cup assembly is below a material opening of a storage bin, a blocking member is at least partially located on a moving path of the paper bag, and a guide assembly has two guide plates, wherein the paper bag in the storage bin is taken out by means of the suction cup in the suction cup assembly, and the blocking member contacts with an extended edge of the paper bag while the paper bag moves downward, thereby realizing vertical opening of the bag opening, and the two guide plates of the guide assembly act on the two side edges of the bag opening when the cover body moves to a state located in the guide channel, so that the two side edges of the bag opening are away from each other and in an open state, so that the cooperation of the suction cup, the blocking member and the guide assembly can simplify the operation of opening the bag opening, and cleverly decompose the opening of the bag opening into two steps, vertical and horizontal, and respectively complete the operation with the help of the power provided by the process of taking out the paper bag and the process of transferring the cover body, without the need for a separate driving mechanism or multiple steps, and is very convenient and practical.

Description

Technical Field

[0001] The invention relates to the field of paper bag packaging machines. Background Art

[0002] In the field of bottle cap packaging, film wrapping machines are usually used for bagging, thermoplastic sealing and other operations. However, this form of packaging requires labeling and classification of the whole stack of packaged bottle caps. Since the whole stack of packaged bottle caps has a certain volume, it is very troublesome to carry and move them, and the packaging may be damaged in the process. Therefore, many bottle caps are packaged in paper bags, which can be printed with logos and labeled before packaging, which is very convenient. Due to the special nature of paper materials, the traditional manual bag filling process is difficult to meet modern packaging needs.

[0003] In order to solve the problem of low efficiency of manual filling, some relatively automated paper bag packaging machines have appeared on the market. For example, the Chinese invention patent with the public announcement number: CN106516267A discloses "An automatic bag opening device", which first sucks a gap open at the bag opening through two upper and lower suction cups, and then uses the expansion rod, rotating cylinder and expansion cylinder in the expansion mechanism to fully expand the paper bag until the bag opening is in a standard shape. Although the above-mentioned device can realize the opening of paper bags, due to the different materials of paper bags, the openings of some paper bags made of softer materials are small and cannot be directly sucked open by suction cups. In actual use, customers are required to repeatedly adjust the suction force of the suction cups, which is very cumbersome and there is still a certain possibility of failure in suction. For example, the Chinese invention application with patent number CN201811148750.8, "A rotary bag opening device for packaging bags", grabs the paper bag through a feeding device and moves it to the loading position. Through the symmetrically arranged opening units, the opening units move left and right on the guide shaft to meet the opening of paper bags of different widths. The rotating support plate in each opening mechanism is divided into upper and lower parts, which is convenient for adjusting the position of the rotating support plate to meet the requirements of paper bags of different height specifications, and has strong adaptability.

[0004] Although the device solves the problem of bag opening failure by sucking the upper and lower surfaces of the paper bag respectively, the entire bag opening procedure needs to include sucking and clamping the upper bag surface, moving the bag, sucking and clamping the lower bag surface, and rotating the rotating support plate to open the bag. It is not only very cumbersome, but also wastes a lot of time, making the packaging efficiency very low.

[0005] like Figure 1The figure shows a schematic diagram of a conventional packaging paper bag. When the paper bag leaves the factory, an opening 100 for placing the workpiece is usually left at one end, and an extended edge 103 is left at the upper edge of the opening 100 to facilitate opening the bag. After the paper bag is filled with the workpiece, it is necessary to close the bag, that is, the end of the opening 100 is turned over and folded to form a folded edge 101, so as to isolate the body 102 containing the workpiece from the outside. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide a paper bag packaging machine which can realize bag opening in one step and improve packaging efficiency in view of the current status of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide a paper bag packaging machine which can automatically close the bag mouth and stack the paper bags after packaging in view of the current status of the prior art.

[0008] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: the paper bag packaging machine comprises:

[0009] A frame having a workbench with a processing position for packaging the entire stack of covers into paper bags;

[0010] A feeding device, arranged upstream of the processing position, having a feeding channel for conveying the entire stack of cover bodies to the processing position;

[0011] A storage bin is used to store stacked paper bags and is arranged above the processing position. A material port for taking out paper bags is provided at the bottom of the storage bin;

[0012] Also included are:

[0013] A suction cup assembly is arranged below the material port, and a power output end of the suction cup is provided with a suction cup that moves up and down relative to the workbench to take out the paper bag at the material port and move the paper bag to the packaging position;

[0014] a blocking member disposed on the workbench and at least partially located on the moving path of the paper bag, wherein when the paper bag moves downward to the packaging position, the blocking member abuts against the extended edge of the upper edge of the paper bag, so that the upper and lower edges of the bag opening are separated from each other; and

[0015] The guide assembly comprises two guide pieces extending along the feeding direction of the whole stack of cover bodies and relatively arranged on both sides of the outlet end of the feeding channel, a guide channel for the cover body 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, and when the cover body to be packaged is located in the guide channel, the two guide pieces act on the two side edges of the bag opening respectively, so that the two side edges of the bag opening are away from each other and in an open state, thereby making the guide channel communicate with the inside of the paper bag.

[0016] In order to facilitate the entire stack of covers to enter the paper bag, preferably, the guide assembly also includes a support seat, and the two guide pieces are rotatably mounted on the support seat near the middle and the rotation axis extends vertically. In a natural state, the spacing between the first ends of the two guide pieces is not less than the spacing between the second ends, so that the opening of the inlet is not less than the opening of the outlet. In this way, the different openings at both ends of the guide pieces are designed, on the one hand, the opening of the inlet end is larger, which facilitates the entire stack of covers to enter the guide channel from the loading part, and on the other hand, the outlet end is smaller, so that before guiding the entire stack of covers, it can be more convenient to connect the outlet end of the guide channel with the bag mouth part, thereby ensuring the connection between the guide channel and the space inside the bag.

[0017] Preferably, the guide assembly also includes an elastic member, which acts on at least one guide plate and causes the second ends of the two guide plates to always tend to approach each other. The difference in opening between the two ends of the two guide plates can be achieved by an independent driving mechanism, but is preferably an elastic member, so that when the entire stack of covers passes through the outlet end of the guide channel, the outlet end can quickly return to its initial state under the action of the elastic member.

[0018] In order to adapt to the arc-shaped edge of the cover body, preferably, the longitudinal cross-sections of the two guide pieces are both in an arc-shaped structure with upper and lower ends bent toward the guide channel.

[0019] In order to ensure that the upper area between the two guide plates will not be disturbed by the outside world and affect the transportation of the cover body, preferably, the guide assembly also includes a cover plate, which is arranged on the top of the two guide plates, and the lower surface of the cover plate forms the top wall of the guide channel.

[0020] The blocking member can be in different positions. Specifically, the cover plate is connected to the frame through a support frame, and the support frame is also provided with a side plate extending along the feeding direction of the entire stack of cover bodies. The side plate is at least partially located above the cover plate, and the blocking member is connected to the side plate, and its extension direction is consistent with that of the side plate.

[0021] In order to facilitate the grabbing of paper bags from the storage bin, the suction cup assembly includes a base plate and at least two suction cup members vertically penetrated through the base plate and arranged at intervals. The frame is also provided with a first driver, which is arranged below the workbench and has a power output end drivingly connected to the base plate, thereby driving the base plate and the suction cup member to synchronously move relative to the workbench toward the material port to take out the paper bags at the material port.

[0022] In order to ensure that the whole stack of cover bodies can be conveyed into the guide channel, preferably, the loading device includes a loading seat and a toggle mechanism, the loading seat is arranged on the workbench and has a loading channel opening upward, the feeding end of the loading channel has a feeding port, and the discharging end has a discharging port for outputting the cover bodies, the discharging port is connected with the inlet of the guide channel, the power output end of the toggle mechanism has a toggle assembly for pushing the whole stack of cover bodies in the loading channel into the guide channel, the toggle assembly is at least partially located above the loading channel, and can move back and forth along the loading channel when it moves downward to a state where it is located in the loading channel.

[0023] In order to further solve the above second technical problem, the technical solution adopted by the present invention is: the paper bag packaging machine also includes a material receiving device, and the material receiving device includes a sealing mechanism and a material receiving mechanism, wherein:

[0024] The sealing mechanism is arranged between the packaging position and the receiving position, and the power output end of the sealing mechanism has a pressing plate for pressing the bag opening of the paper bag to bend the entire paper bag to form a folded edge;

[0025] The receiving mechanism is arranged on the frame, and the power output end is provided with a tray for conveying the bent paper bags to the receiving position. The tray is arranged below the workbench and can move back and forth between the packaging position and the receiving position.

[0026] In order to ensure that the area adjacent to the opening of the paper bag can be pressed downward to seal the paper bag, preferably, the pressing plate is arranged above the workbench, and a gap is formed between the pressing plate and the workbench for accommodating the opening end of the paper bag, and the workbench is provided with a notch matching the pressing plate at a position corresponding to the pressing plate, and the sealing mechanism also includes a first driving mechanism, and the output end of the first driving mechanism is drivingly connected to the pressing plate to drive the pressing plate to move up and down relative to the workbench, and then extend into or out of the notch accordingly, and when the pressing plate extends into the notch, the folded edge of the paper bag is stacked up and down with its body.

[0027] In order to realize the storage of the closed paper bags, preferably, the material receiving mechanism has a sliding assembly for driving the tray to slide between the packaging position and the material receiving position, and the sliding assembly includes a guide rail, a slide seat and a second driving mechanism. The guide rail is arranged on the frame and extends along the feeding direction. The slide seat is slidingly constrained on the guide rail, and the tray is mounted on the slide seat and can slide synchronously with the slide seat. The second driving mechanism is arranged on the guide rail, and the output end is drivingly connected to the slide seat.

[0028] In order to ensure that the tray can lift the paper bags smoothly and avoid interference with other components during the movement of the paper bags, preferably, the material receiving mechanism also includes a lifting assembly for driving the tray to move up and down relative to the workbench, and the lifting assembly includes a lifting plate and a third driving mechanism. The third driving mechanism is arranged on the slide seat, and the power output end is connected to the lifting plate driving, thereby driving the lifting plate to move up and down relative to the workbench. The tray is installed on the lifting plate and can move up and down synchronously with the lifting plate.

[0029] Compared with the prior art, the advantages of the present invention are: the paper bag packaging machine takes out the paper bags in the storage bin through the suction cups in the suction cup assembly, the blocking member is designed on the moving path of the paper bag downward, and contacts with the extended edge of the paper bag when the paper bag moves downward, so as to realize the vertical opening of the bag mouth, and the two guide plates of the guide assembly act on the two side edges of the bag mouth when the cover body moves to a state located in the guide channel, so that the two side edges of the bag mouth are away from each other and in an open state. In this way, the cooperation of the suction cup, the blocking member and the guide assembly can simplify the operation of opening the bag mouth, and cleverly decompose the opening of the bag mouth into two steps, vertical and horizontal, and complete them respectively with the help of the power provided by the process of taking out the paper bag and the process of transferring the cover body, without the need for a separate driving mechanism or multiple steps, which is very convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of a paper bag in an embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of the overall structure of a paper bag machine in an embodiment of the present invention;

[0032] Figure 3 for Figure 2 A schematic diagram from another angle after omitting some structures;

[0033] Figure 4 It is a schematic diagram of the overall structure of the guide assembly in an embodiment of the present invention;

[0034] Figure 5 It is an overall schematic diagram of a feeding device in an embodiment of the present invention;

[0035] Figure 6 for Figure 5 Schematic diagram from another angle;

[0036] Figure 7 This is the overall schematic diagram after omitting the workbench;

[0037] Figure 8 It is a schematic diagram of the overall structure of the material receiving device in an embodiment of the present invention;

[0038] Fig. 9It is a schematic diagram of a pushing component in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below with reference to the accompanying drawings.

[0040] like Figures 1 to 9 As shown, it is a preferred embodiment of the present invention. In this embodiment, the paper bag packaging machine includes a frame 1, a storage bin 11, a suction cup assembly 8, a blocking member 72, a guide assembly 7, a feeding device and a receiving device.

[0041] The frame 1 in this embodiment has a workbench 2, which has a packaging position 2a for packaging a whole stack of cover bodies into paper bags. A receiving position 2b is also provided at the downstream position of the packaging position 2a of the workbench 2. The above-mentioned feeding device is arranged upstream of the packaging position 2a, and is used to transport the cover bodies to the packaging position 2a. The output end of the receiving device is arranged in the area between the packaging position 2a and the receiving position 2b, and is used to transport the cover bodies packaged in the packaging position 2a and the outer packaging paper bag to the receiving position 2b. The cooperation of these components forms a complete cover body packaging production line, thereby realizing the packaging of the whole stack of cover bodies. The cover body in this embodiment refers to an easy-tear cover with a good sealing effect, but it is not limited to this. In the above-mentioned feeding device, its feeding seat 5 has a feeding channel 50 with an opening facing upward. During packaging, multiple cover bodies are stacked layer by layer and arranged in sequence in the feeding channel 50 to form a whole stack of cover bodies. The description of the cover body involved in this embodiment can be understood as a whole stack of cover bodies similar to this state.

[0042] The storage bin 11 in this embodiment is used to place stacked paper bags. The storage bin 11 is arranged above the packaging position 2a. A material opening for taking out paper bags is opened at the bottom of the storage bin 11. The size of the bottom material opening can be adjusted and replaced depending on the size of the paper bags it contains. The bag body is placed horizontally in the storage bin, and the bag body taken out from the material opening can also be understood as a basically horizontal state. The structure of the storage bin 11 is relatively conventional and will not be elaborated here.

[0043] In this embodiment, the suction cup assembly 8 is arranged below the material port of the storage bin 11, and its power output end has a suction cup 81 that moves up and down relative to the workbench 2 to take out the paper bag at the material port and move the paper bag to the packaging position. Specifically, the suction cup assembly 8 includes a base plate 82 and at least two suction cups 81 vertically penetrated on the base plate 82 and arranged at intervals. The frame 1 is also provided with a first driver 83, which is arranged below the workbench 2 and the output end is connected to the base plate 82 for driving, thereby driving the base plate 82 and the suction cup 81 to synchronously move up relative to the workbench 2 to approach the material port to take out the paper bag at the material port. The suction cup is usually connected to an air pump, an air compressor and other suction equipment through an air suction pipe, which is relatively conventional here and will not be described in detail.

[0044] In this embodiment, the paper bag is usually in a closed state before packaging. The bag body can automatically achieve a "half-open" bag mouth during the downward movement. The blocking member 72 is arranged on the workbench 2 and is at least partially located on the moving path of the paper bag. When the paper bag moves downward to the packaging position 2a, the blocking member 72 abuts against the extended edge 103 of the upper edge of the paper bag to make the upper and lower edges of the bag mouth move away from each other. During packaging, the bag mouth of the paper bag needs to be opened separately. For the finished paper bag, its upper and lower edges are usually tightly fitted together, and it is difficult to open the bag mouth. The lossless opening of the bag body usually requires multiple driving components to apply complex actions to achieve it. Therefore, in this embodiment, the design of the blocking member 72 uses the power of taking out the paper bag to synchronously complete the separation of the upper and lower edges of the paper bag, thereby achieving the "half-open" of the bag mouth of the paper bag, that is, it provides a pre-preparation for the full expansion of the bag mouth of the paper bag, reducing the difficulty of opening the paper bag.

[0045] The bag mouth needs to be fully opened after being half opened. The guide assembly 7 in this embodiment has two guide pieces 71 extending along the feeding direction of the entire stack of cover bodies and relatively arranged on both sides of the outlet end of the feeding channel 50. A guide channel 70 for the cover body to pass through is formed between the two guide pieces 71. An inlet 7a of the guide channel 70 is formed between the first ends of the two guide pieces 71, and an outlet 7b of the guide channel 70 is formed between the second ends. When the cover body to be packaged is located in the guide channel 70, the two guide pieces 71 act on the two side edges of the bag mouth respectively, so that the two side edges of the bag mouth are away from each other and in an open state, thereby connecting the guide channel 70 with the inside of the paper bag. Specifically, the above-mentioned guide assembly 7 also includes a support seat 76, and the two guide pieces 71 are rotatably installed near the middle position on the support seat 76 and the rotation axis extends vertically. In a natural state, the spacing between the first ends of the two guide pieces 71 is not less than the spacing between the second ends, so that the opening of the inlet 7a is not less than the opening of the outlet 7b. The different openings at both ends of the pair of guide pieces 71 are designed. On the one hand, the opening of the inlet end is larger, which is convenient for the entire stack of cover bodies to enter the guide channel 70 from the loading part, and on the other hand, the outlet end is smaller. In this way, before guiding the entire stack of cover bodies, it can be more convenient to connect the outlet end of the guide channel 70 with the bag mouth part, ensuring the connection between the guide channel 70 and the space inside the bag.

[0046] The above-mentioned guide assembly 7 also includes an elastic member 77, which acts on at least one guide piece 71 and makes the second ends of the two guide pieces 71 always tend to approach each other, so that when the entire stack of cover bodies passes through the outlet end of the guide channel 70, the outlet end can quickly return to its initial state under the action of the elastic member 77; in order to adapt to the arc-shaped edge of the cover body, the longitudinal cross-sections of the above-mentioned two guide pieces 71 are both arc-shaped structures with the upper and lower ends bent toward the guide channel 70.

[0047] In addition, the guide assembly 7 also includes a cover plate 73, which is covered on the top of the two guide pieces 71, and the lower surface of the cover plate 73 forms the top wall of the guide channel 70. The cover plate 73 is connected to the frame 1 through a support frame 74, and the support frame 74 is also provided with a side plate 75 extending along the feeding direction of the whole stack of cover bodies, and the side plate 75 is at least partially located above the cover plate 73. The blocking member 72 mentioned above is a plate body connected to the side plate 75, and its extension direction is from the side plate 75 toward the outlet end of the guide channel 70, and in order to smoothly touch the paper bag, the blocking member 72 needs to extend a distance outside the cover plate 73.

[0048] In order to realize the loading of the cover body, the loading device in this embodiment includes a toggle mechanism 60 in addition to the loading seat 5 mentioned above. The feeding end of the loading channel 50 has a feeding port 5a, and the discharging end has a discharging port 5b for discharging the cover body. The discharging port 5b is connected to the inlet 7a of the guide channel 70. The power output end of the toggle mechanism 60 has a toggle component for pushing the entire stack of cover bodies in the loading channel 50 into the guide channel 70. The toggle component is at least partially located above the loading channel 50, and can move back and forth along the loading channel 50 when it moves downward to a state where it is located in the loading channel 50.

[0049] The toggle assembly of the toggle mechanism 60 has a first toggle member 61 for pushing the entire stack of covers from the feed port 5a through the loading channel 50, and a second toggle member 62 for pushing the entire stack of covers from the loading channel 50 to the discharge port 5b, and then to the guide channel 70 through the discharge port 5b. The first toggle member 61 and the second toggle member 62 are both arranged above the loading channel 50, and can alternately move downward and at least partially extend into the loading channel 50.

[0050] In this embodiment, the workbench 2 is provided with a first base 63 and a second base 65 arranged side by side, the first toggle member 61 is slidably constrained on the first base 63, the second toggle member 62 is slidably constrained on the second base 65, and the extension directions of the first base 63 and the second base 65 are consistent with the loading channel 50. Specifically, the first base 63 and the second base 65 are arranged on both sides of the loading seat 5, respectively.

[0051] In order to further ensure that the first toggle member 61 and the second toggle member 62 can slide relative to the loading channel 50 to achieve the purpose of pushing the entire stack of cover bodies, a first slide 631 is provided on the above-mentioned first base 63, and the first toggle member 61 is a paddle, the extension direction of which is perpendicular to the moving direction of the cover body to be packaged, and its first end is connected to the first slide 631, and the second end extends toward the loading channel 50; the sliding of the above-mentioned first slide 631 is achieved by a second driver 632, and the output end of the second driver 632 is drivingly connected to the first slide 631, thereby driving the first slide 631 to slide back and forth along the length direction of the first base 63, and the first slide 631 is provided with an extension rod 633 extending along its moving direction, and the first end of the paddle is connected to the extension rod 633.

[0052] The sliding of the second slide 651 is achieved through the third driver 652. Specifically, the second base 65 is provided with a second slide 651. The power output end of the third driver 652 is drivingly connected to the second slide 651, thereby driving the second slide 651 to slide back and forth along the length direction of the second base 65. The second shifting member 62 in this embodiment is a shifting rod installed on the second slide 651 and extending along the sliding direction of the second slide 651.

[0053] The two toggle members mentioned above can deflect relative to the workbench while achieving sliding, and then extend into the feeding channel 50 at an appropriate time to complete the pushing action. The deflection of the first toggle member 61 is achieved as follows: the workbench 2 has two first mounting seats 637 arranged at intervals along the extension direction of the feeding channel 50 on one side of the feeding seat 5, the first base 63 is rotatably arranged between the two first mounting seats 637, and first mounting plates 638 are provided at both ends of the first base 63, each first mounting plate 638 has a first rotating shaft 635 extending toward the corresponding first mounting seat 637, and the first mounting seat 637 is correspondingly provided with an axial hole matching the first rotating shaft 635. The third driving mechanism 636 is also included. The power output end of the third driving mechanism 636 is connected to the first mounting plate 638, and can drive the first base 63 to rotate around the first rotating shaft 635, so that the first toggle member 61 installed on the first base 63 can rotate synchronously with the first base 63 and extend into the feeding channel 50. Specifically, the third driving mechanism 636 can be a driving motor or a cylinder.

[0054] As for the second toggle member 62, the above-mentioned workbench 2 has two second mounting seats 653 arranged at intervals along the extension direction of the loading channel 50 on the other side of the loading seat 5, the second base 65 is rotatably arranged between the two second mounting seats 653, and the second mounting plates 657 are arranged at both ends of the second base 65, each second mounting plate 657 has a second rotating shaft 655 extending toward the corresponding second mounting seat 653, and the second mounting seat 653 is correspondingly provided with an axial hole matching the second rotating shaft 655. A fourth driving mechanism 656 is also included, the power output end of the fourth driving mechanism 656 is connected to the second mounting plate 657, and can drive the second base 65 to rotate with the second rotating shaft 655 as the axis, and similarly, the second toggle member 62 installed on the second base 65 can rotate synchronously with the second base 65 and extend into the loading channel 50. Specifically, the fourth driving mechanism 656 can adopt a driving motor or a cylinder.

[0055] In this embodiment, the receiving device of the paper bag packaging machine includes a sealing mechanism 3 and a receiving mechanism 4. The sealing mechanism 3 is arranged between the packaging position 2a and the receiving position 2b, and its power output end has a pressing plate 31 for pressing the bag mouth of the paper bag to bend the entire paper bag to form a folded edge 101, while the receiving mechanism 4 is arranged on the frame 1, and its power output end has a tray 40 for conveying the bent paper bag to the receiving position 2b, and the tray 40 is arranged below the workbench 2 and can move back and forth between the packaging position 2a and the receiving position 2b.

[0056] There are many ways to achieve the folding and sealing of the mouth of the paper bag. In this embodiment, the above-mentioned pressing plate 31 is arranged above the workbench 2, and a gap 30 is formed between the pressing plate 31 and the workbench 2 for the opening end of the paper bag to be accommodated therein. Specifically, a notch 20 matching the pressing plate 31 is provided at a position corresponding to the pressing plate 31 on the workbench 2, and the sealing mechanism 3 also includes a first driving mechanism 32, the power output end of the first driving mechanism 32 is drivingly connected to the pressing plate 31 to drive the pressing plate 31 to move up and down relative to the workbench 2, and then extend into or move out of the notch 20 accordingly, and when the pressing plate 31 extends into the notch 20, the folded edge of the paper bag is stacked up and down with its body. In addition, a suspension 33 is provided above the above-mentioned workbench 2, and the first driving mechanism 32 is installed on the suspension 33 and the output shaft extends downward. The above-mentioned first driving mechanism 32 can specifically adopt a driving motor or a cylinder.

[0057] When the paper bag is packaged, the bag opening is opposite to the outlet of the guide channel 70 and connected together during packaging. When the sealing operation is performed, the blocking member 72 and other components will affect the movement of the pressing plate 31. Figure 7 , Figure 8 and Fig. 9A pushing assembly 84 is also provided on the workbench 2, specifically including a push plate 841 and a fifth driving mechanism 842. The push plate 841 can slide on the workbench under the drive of the corresponding fifth driving mechanism 842, so as to push the packaged paper bag downstream for a short distance and move it into the gap 30 formed between the pressing plate 31 and the workbench 2, and make the part of the paper bag that needs to be bent face the above-mentioned notch 20, that is, just below the pressing plate 31. The above-mentioned fifth driving mechanism 842 can specifically adopt a driving motor or a cylinder.

[0058] In this embodiment, in order to further ensure that the tray can slide between the packaging position 2a and the receiving position 2b, the above-mentioned receiving mechanism 4 has a sliding assembly 41 for driving the tray 40 to slide between the packaging position 2a and the receiving position 2b, and the sliding assembly 41 includes a guide rail 411 and a slide 412. The guide rail 411 is arranged on the frame 1 and extends along the feeding direction. The slide 412 is slidably constrained on the guide rail 411. The tray 40 is installed on the slide 412 and can slide synchronously with the slide 412. Specifically, the sliding assembly 41 also includes a second driving mechanism 42, which is arranged on the guide rail 411, and the power output end is drivingly connected to the slide 412. The above-mentioned second driving mechanism 42 can specifically adopt a driving motor or a cylinder.

[0059] In addition, when the tray is lifted, it will move up and down to achieve contact with the paper bag, so the material receiving mechanism 4 also includes a lifting assembly 43 for driving the tray 40 to move up and down relative to the workbench 2. The lifting assembly 43 includes a lifting plate 431 and a third driving mechanism 432. The third driving mechanism 432 is arranged on the slide 412, and the power output end is drivingly connected to the lifting plate 431, thereby driving the lifting plate 431 to move up and down relative to the workbench 2. The tray 40 is installed on the lifting plate 431 and can move up and down synchronously with the lifting plate 431. The above-mentioned third driving mechanism 432 can specifically adopt a driving motor or a cylinder.

[0060] In this embodiment, the slide seat 412 extends upward on at least one side of its moving direction to form a support plate 413, a connecting sleeve 414 is provided on the top of the support plate 413, and a guide column 433 matching the connecting sleeve 414 is provided on the bottom of the lifting plate 431. The lifting plate 431 drives the tray 40 to move up and down relative to the workbench 2 through the sliding matching between the connecting sleeve 414 and the guide column 433.

[0061] In order to ensure that the paper bag can move stably when it is lifted, the above-mentioned tray 40 has two corresponding supports at both ends of the bent paper bag. The two trays 40 are arranged at intervals perpendicular to the feeding direction, and the workbench 2 is provided with an avoidance opening 200 for the corresponding tray 40 to pass through and slide inside.

[0062] In addition, the above-mentioned receiving position 2b has at least two partitions 21 arranged on the workbench 2 and spaced apart along the feeding direction. The extension direction of each partition 21 is perpendicular to the feeding direction, and a storage groove 2c for holding the packaged bag body is formed between two adjacent partitions 21.

[0063] The working process of the paper bag packaging machine is as follows:

[0064] 1. The suction cup 81 moves upward under the drive of the first driver 83. The suction cup 81 is connected to the external negative pressure source and generates negative pressure to suck the paper bag at the material opening of the storage bin 11. Then, the first driver 83 drives the suction cup 81 to move the paper bag downward to the outlet 7b of the guide channel 70. During the downward movement, the extended edge 103 of the bag opening of the paper bag touches the blocking member 72 and is in the "half-open" state mentioned above.

[0065] 2. The cover bodies to be packaged are transported to the feeding channel 50 from the previous process, and are stacked in the feeding channel 50 in sequence along the extension direction of the feeding channel 50. After a certain number of cover bodies are stacked, the first toggle member 61 is extended into the feeding channel 50, and pushes the whole stack of cover bodies to the downstream section of the feeding channel 50. Then the first toggle member 61 is moved out. Since the cover bodies are pushed away, the upstream section of the feeding channel 50 is exposed to allow the second toggle member 62 (i.e., the toggle rod) to extend into the space. At this time, the second toggle member 62 is extended into the feeding channel 50, and continues to push the whole stack of cover bodies to the downstream of the feeding channel 50, and enters the guide channel 70. Since the spacing between the first ends of the two guide plates 71 is not less than the spacing between the second ends, the whole stack of cover bodies entering the guide channel 70 will collide with the guide channel 70 0, on the one hand, the two guide pieces 71 are slightly moved forward so that the second ends with a smaller spacing extend into the half-open bag opening (the second ends of the two guide pieces are close in spacing, which is equivalent to forming a relatively sharp head at the second end of the entire guide assembly), on the other hand, as the whole stack of covers gradually moves, the second ends of the two guide pieces 71 extending into the bag opening gradually move away from each other, thereby opening the bag opening, and then, under the continued pushing of the second toggle member 62, all the covers enter the bag space, and then the fifth driving mechanism 842 in the pushing assembly 84 drives the push plate 841 to push the packaged paper bag downstream for a short distance and move it into the gap 30 formed between the pressing plate 31 and the workbench 2, and make the part of the paper bag that needs to be bent face the above-mentioned notch 20, that is, just located below the pressing plate 31;

[0066] 3. Driven by the first driving mechanism 32, the pressing plate 31 moves downward and presses on the area near the opening of the paper bag, so that the front part of the entire paper bag is bent downward to form a folded edge 101, completing the closing. Then, the second driving mechanism 42 drives the tray 40 to move to the bottom of the packaged paper bag, and the third driving mechanism 432 drives the tray 40 to move upward to complete the lifting of the paper bag. Then, the second driving mechanism 42 drives the tray 40 to move to the corresponding position and places the paper bag at the receiving position 2b.

Claims

1. A paper bag packaging machine, comprising: A frame (1) having a workbench (2), wherein the workbench (2) has a packaging position (2a) for packaging a whole stack of cover bodies into a paper bag; A feeding device, arranged upstream of the packaging position (2a), having a feeding channel (50) for conveying a whole stack of cover bodies to the packaging position (2a); A storage bin (11) for storing stacked paper bags, arranged above the packaging position (2a), and a material opening for taking out paper bags is provided at the bottom of the storage bin (11); It is characterized by also including: A suction cup assembly (8) is arranged below the material port, and a power output end thereof has a suction cup (81) that moves up and down relative to the workbench (2) to take out the paper bag at the material port and move the paper bag to the packaging position; a blocking member (72) disposed on the workbench (2) and at least partially located on the moving path of the paper bag, wherein when the paper bag moves downward to the packaging position, the blocking member (72) abuts against the extended edge of the upper edge of the paper bag, so that the upper and lower edges of the bag opening are separated from each other; and The guide assembly (7) comprises two guide pieces (71) extending along the feeding direction of the whole stack of cover bodies and arranged relatively on both sides of the outlet end of the feeding channel (50); a guide channel (70) for the cover bodies to pass through is formed between the two guide pieces (71); an inlet (7a) of the guide channel (70) is formed between the first ends of the two guide pieces (71) and an outlet (7b) of the guide channel (70) is formed between the second ends; and when the cover bodies to be packaged are located in the guide channel (70), the two guide pieces (71) act on the two side edges of the bag opening respectively, so that the two side edges of the bag opening are away from each other and in an open state, thereby making the guide channel (70) communicate with the inside of the paper bag.

2. The paper bag packaging machine according to claim 1, characterized in that: The guide assembly (7) further comprises a support seat (76), and the two guide pieces (71) are rotatably mounted on the support seat (76) near the middle portion thereof, with the rotation axis extending vertically. In a natural state, the spacing between the first ends of the two guide pieces (71) is not less than the spacing between the second ends, so that the opening of the inlet (7a) is not less than the opening of the outlet (7b).

3. The paper bag packaging machine according to claim 2, characterized in that: The guide assembly (7) further comprises an elastic member (77), wherein the elastic member (77) acts on at least one guide piece (71) and causes the second ends of the two guide pieces (71) to always have a tendency to approach each other.

4. The paper bag packaging machine according to claim 3, characterized in that: The longitudinal cross-sections of the two guide pieces (71) are both in an arc-shaped structure with upper and lower ends bent toward the guide channel (70).

5. The paper bag packaging machine according to claim 4, characterized in that: The guide assembly (7) further comprises a cover plate (73), wherein the cover plate (73) is arranged on the top of the two guide plates (71), and the lower surface of the cover plate (73) forms the top wall of the guide channel (70).

6. The paper bag packaging machine according to claim 5, characterized in that: The cover plate (73) is connected to the frame (1) via a support frame (74), and the support frame (74) is also provided with a side plate (75) extending along the feeding direction of the whole stack of cover bodies, and the side plate (75) is at least partially located above the cover plate (73), and the blocking member (72) is connected to the side plate (75) and its extension direction is consistent with that of the side plate (75).

7. The paper bag packaging machine according to claim 1, characterized in that: The suction cup assembly (8) comprises a base plate (82) and at least two suction cups (81) vertically penetrated on the base plate (82) and arranged at intervals. The frame (1) is also provided with a first driver (83). The first driver (83) is arranged below the workbench (2) and has a power output end drivingly connected to the base plate (82), thereby driving the base plate (82) and the suction cups (81) to synchronously move upward relative to the workbench (2) to approach the material port, so as to take out the paper bags at the material port.

8. The paper bag packaging machine according to claim 1, characterized in that: The loading device comprises a loading seat (5) and a toggle mechanism (60), wherein the loading seat (5) is arranged on the workbench (2) and has a loading channel (50) opening upward, wherein the loading channel (50) has a feeding port (5a) at the feeding end and a discharging port (5b) for discharging the cover body, wherein the discharging port (5b) is communicated with the inlet (7a) of the guide channel (70), and the power output end of the toggle mechanism (60) has a toggle assembly for pushing the entire stack of cover bodies in the loading channel (50) into the guide channel (70), wherein the toggle assembly is at least partially located above the loading channel (50) and can move back and forth along the loading channel (50) when it moves downward to a state where it is located in the loading channel (50).

9. The paper bag packaging machine according to claim 1, characterized in that: The workbench (2) further comprises a receiving position (2b) located downstream of the packaging position (2a); and a receiving device for receiving the packaged paper bags and transferring them to the receiving position (2b), wherein the receiving device comprises a sealing mechanism (3) and a receiving mechanism (4), wherein: The sealing mechanism (3) is arranged between the packaging position (2a) and the material receiving position (2b), and its power output end has a pressing plate (31) for pressing the bag mouth of the paper bag to bend the entire paper bag to form a folded edge; The receiving mechanism (4) is arranged on the frame (1), and its power output end has a tray (40) for conveying the bent paper bags to the receiving position (2b). The tray (40) is arranged below the workbench (2) and can move back and forth between the packaging position (2a) and the receiving position (2b).

10. The paper bag packaging machine according to claim 9, characterized in that: The pressing plate (31) is arranged above the workbench (2), and a gap (30) is formed between the pressing plate (31) and the workbench (2) in which the open end of the paper bag is accommodated. The workbench (2) is provided with a notch (20) matching the pressing plate (31) at a position corresponding to the pressing plate (31). The sealing mechanism (3) also includes a first driving mechanism (32). The output end of the first driving mechanism (32) is drivingly connected to the pressing plate (31) to drive the pressing plate (31) to move up and down relative to the workbench (2), thereby correspondingly extending into or out of the notch (20). When the pressing plate (31) extends into the notch (20), the folded edge of the paper bag is stacked up and down with its body.

11. The paper bag packaging machine according to claim 10, characterized in that: The material receiving mechanism (4) has a sliding assembly (41) for driving the tray (40) to slide between the packaging position (2a) and the material receiving position (2b), the sliding assembly (41) comprising a guide rail (411), a slide seat (412) and a second driving mechanism (42), the guide rail (411) being arranged on the frame (1) and extending along the feeding direction, the slide seat (412) being slidably constrained on the guide rail (411), the tray (40) being mounted on the slide seat (412) and being able to slide synchronously with the slide seat (412), the second driving mechanism (42) being arranged on the guide rail (411), and the output end being drivingly connected to the slide seat (412).

12. The paper bag packaging machine according to claim 11, characterized in that: The material receiving mechanism (4) also includes a lifting assembly (43) for driving the tray (40) to move up and down relative to the workbench (2); the lifting assembly (43) includes a lifting plate (431) and a third driving mechanism (432); the third driving mechanism (432) is arranged on the slide seat (412), and the power output end is drivingly connected to the lifting plate (431), thereby driving the lifting plate (431) to move up and down relative to the workbench (2); the tray (40) is mounted on the lifting plate (431) and can move up and down synchronously with the lifting plate (431).

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