A pre-folding device for a lid paper

Abstract

This invention discloses a pre-folding device for top cover paper, relating to the field of cigarette packaging technology. Specifically, this application discloses a pre-folding device for top cover paper, comprising a feeding mechanism, a pre-folding mechanism, and a conveying mechanism. The feeding mechanism has a receiving station and a feeding station, which transport materials from the receiving station to the feeding station. The pre-folding mechanism has a pre-folding station. The conveying mechanism transfers the materials from the feeding station to the pre-folding station, where the pre-folding mechanism folds the edges of the materials. After the pre-folding mechanism completes the folding, the conveying mechanism transfers the materials from the pre-folding station to the forming machine. The feeding mechanism of this invention is used for feeding materials, the pre-folding mechanism for folding the edges, and the conveying mechanism for transferring materials. This makes the pre-folding of the top cover paper simple, convenient, and easy to implement, reducing the labor intensity of workers and improving production efficiency. It also reduces the number of transfer steps after pre-folding, lowering the risk of material damage and reducing production costs.

Description

Technical Field

[0001] This invention relates to the field of cigarette packaging technology, and in particular to a pre-folding device for the top cover paper. Background Technology

[0002] The inner box of a cigarette pack is an independent packaging unit that directly wraps the cigarette. It is usually composed of a top cover paper (inner liner paper) and a label paper, and has the functions of moisture protection and aroma preservation. It is usually made using an inner box forming machine. Currently, during the production of inner boxes using an inner box forming machine, there are cases where the top cover paper tears, causing product scrap.

[0003] To address this issue, before the top cover paper is fed into the inner box forming machine, there is a pre-folding process on all four short sides of the top cover paper to reduce the occurrence of tearing. Therefore, the pre-folding of the top cover paper is a key process in the inner box forming, laying the foundation for subsequent precise folding and sealing, and ensuring packaging efficiency and airtightness.

[0004] In the existing technology, the pre-folding of the top cover paper is usually done manually. After the pre-folding process is completed, the material must be transported to the inner box forming machine. On the one hand, the pre-folding of the top cover paper requires a lot of time and effort, which increases the labor intensity of workers and reduces production efficiency. On the other hand, the transfer after the pre-folding of the top cover paper increases the risk of material damage, thereby increasing production costs. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a pre-folding device for the top cover paper, which makes the pre-folding of the top cover paper simple, convenient, and easy to implement, thereby reducing the labor intensity of workers and improving production efficiency. It also reduces the transfer process after the top cover paper is pre-folded, reducing the risk of material damage and thus reducing production costs.

[0006] This invention proposes a top cover paper pre-folding device, including a feeding mechanism, a pre-folding mechanism disposed on one side of the feeding mechanism, and a conveying mechanism disposed above the pre-folding mechanism. The feeding mechanism has a receiving station at the bottom and a feeding station at the top. The feeding mechanism is used to transport materials from the receiving station to the feeding station. The pre-folding mechanism has a pre-folding station at the top. The conveying mechanism transfers the materials from the feeding station to the pre-folding station. The pre-folding mechanism is used to fold the edges of the materials at the pre-folding station. After the pre-folding mechanism completes the folding of the materials, the conveying mechanism transfers the materials from the pre-folding station to the forming machine.

[0007] Furthermore, the feeding mechanism includes a primary feeding component and a secondary feeding component disposed on one side of the primary feeding component. The primary feeding component conveys a specified number of materials at a time. When the height of the materials conveyed by the primary feeding component is lower than the feeding station, the secondary feeding component takes over from the primary feeding component and conveys the remaining materials to the feeding station.

[0008] Furthermore, the primary loading assembly includes a first frame extending vertically, a receiving assembly disposed at the bottom of the first frame, and a feeding assembly located on one side of the receiving assembly. The receiving assembly can move horizontally on the first frame to receive materials at the receiving station and transport the materials to the feeding assembly. The feeding assembly can move vertically on the first frame to transport the materials to the loading station.

[0009] Furthermore, the receiving assembly includes a first sliding cylinder disposed on the first frame and a receiving seat fixedly connected to the first sliding cylinder. The receiving seat is used to carry materials, and the first sliding cylinder is used to drive the receiving seat to move in the horizontal direction.

[0010] Furthermore, the receiving assembly also includes a baffle rod disposed on one side of the receiving seat, the baffle rod being used to limit the material superimposed on the receiving seat.

[0011] Furthermore, the feeding assembly includes a first guide rail arranged vertically on the first frame, a first slide block slidably connected to the first guide rail, a feeding drive assembly connected to the first slide block, and a feeding seat connected to the first slide block. The feeding seat is used to receive the material conveyed by the feeding assembly. The feeding drive assembly drives the first slide block to move along the first guide rail, and the first slide block drives the feeding seat to move vertically.

[0012] Furthermore, the feeding seat includes a feeding platform and a feeding rod fixedly connected at one end to the first slide. The first frame is provided with a strip-shaped guide hole extending in the vertical direction. The feeding platform is provided with a feeding groove. The other end of the feeding rod passes through the strip-shaped guide hole and is fixedly connected to the feeding platform. The feeding assembly can be inserted into the feeding groove so that the feeding platform can receive the material conveyed by the feeding assembly.

[0013] Furthermore, the secondary feeding assembly includes a second frame disposed on one side of the primary feeding assembly, and a material-bearing assembly disposed on the second frame. The material-bearing assembly can move vertically on the second frame to take over from the primary feeding assembly and transport the remaining material to the feeding station.

[0014] Furthermore, the material receiving assembly includes a second guide rail extending vertically on the second frame, a second slide block slidably connected to the second guide rail, a material receiving seat disposed on the second slide block, and a first telescopic cylinder disposed on the second frame. The first telescopic cylinder is connected to the second slide block and is used to drive the second slide block to move along the second guide rail. The second slide block drives the material receiving seat to move vertically, so that the material receiving seat takes over from the primary feeding assembly to transport the remaining material to the feeding station.

[0015] Furthermore, the material support includes a second telescopic cylinder disposed on the second slide and a material support rod connected to the second telescopic cylinder. The second telescopic cylinder drives the material support rod to move in the horizontal direction so that the material support rod supports the material conveyed by the primary feeding assembly.

[0016] Furthermore, the pre-folding mechanism includes a support seat disposed on one side of the feeding mechanism, a pressure plate disposed around the support seat, and a pre-folding drive assembly connected to the pressure plate. The support seat is used to support the material, and the pre-folding drive assembly drives the pressure plate to move toward or away from the support seat, so that the pressure plate folds the material on the support seat.

[0017] Furthermore, the pre-folding drive assembly includes a pre-folding base arranged parallel to and spaced apart from the support base, a third telescopic cylinder disposed on the pre-folding base, a lifting seat connected to the third telescopic cylinder, and a swing arm assembly with one end rotatably connected to the pre-folding base and the middle part rotatably connected to the lifting seat. The third telescopic cylinder drives the lifting seat to move up and down in the vertical direction. The pressure plate is disposed at the end of the swing arm assembly away from the pre-folding base. The lifting seat drives the swing arm assembly to swing, thereby causing the pressure plate to move towards or away from the support base.

[0018] Furthermore, the swing arm assembly includes a first swing arm with one end rotatably connected to the pre-folding base and the other end fixedly connected to the pressure plate, and a second swing arm with one end rotatably connected to the lifting seat and the other end rotatably connected to the first swing arm.

[0019] Furthermore, the conveying mechanism includes a third frame disposed above the pre-folding mechanism, a horizontal drive assembly disposed on the third frame, a vertical drive assembly connected to the horizontal drive assembly, and a suction cup seat connected to the vertical drive assembly. The suction cup seat is used to adsorb or release materials, the vertical drive assembly is used to drive the suction cup seat to move up and down in the vertical direction, and the horizontal drive assembly is used to drive the suction cup seat to move in the horizontal direction.

[0020] Furthermore, the horizontal drive assembly includes a second sliding cylinder disposed on the third frame and a third slide block disposed on the second sliding cylinder, and the vertical drive assembly is connected to the third slide block.

[0021] Furthermore, the vertical drive assembly includes a third guide rail extending in the vertical direction, a U-shaped guide groove disposed on the third frame, a connecting rod with one end slidably connected to the U-shaped guide groove and the other end fixedly connected to the third guide rail, a rotary motor disposed on the third frame, and a third swing arm with one end fixedly connected to the rotary motor and the other end movably connected to the connecting rod. The third guide rail is slidably connected to the third slide block, and the suction cup seat is fixedly connected to the third guide rail.

[0022] The pre-folding device for the top cover paper proposed in this invention has the following beneficial effects:

[0023] (1) This device includes a feeding mechanism, a pre-folding mechanism and a conveying mechanism. The feeding mechanism is used to feed the material, the pre-folding mechanism is used to fold the material, and the conveying mechanism is used to transfer the material. This makes the pre-folding of the top cover paper simple, convenient and easy to implement, reduces the labor intensity of workers and improves production efficiency, and reduces the transfer process after the pre-folding of the top cover paper, reduces the risk of material damage and reduces production costs.

[0024] (2) The feeding mechanism of this device includes a primary feeding component and a secondary feeding component. The primary feeding component conveys a specified number of materials at a time. When the height of the material conveyed by the primary feeding component is lower than the feeding station, the secondary feeding component takes over from the primary feeding component to convey the remaining material to the feeding station. The primary feeding component can return to the receiving station to convey the next material, thereby enabling the feeding mechanism to feed continuously and further improve production efficiency.

[0025] (3) The receiving assembly of this device also includes a baffle rod located on one side of the receiving seat. The baffle rod is located on the side of the receiving seat away from the feeding assembly, so that during the process of the receiving seat conveying the stacked materials to the feeding assembly, the baffle rod limits the material and prevents the material from tipping over. This makes the device simple and convenient to use and easy to implement, thereby improving production efficiency.

[0026] (4) The feeding seat of this device includes a feeding platform and a feeding rod. A feeding trough is provided on one side of the feeding platform. When the receiving seat moves horizontally on the first frame and conveys the material it carries to one side, it is inserted into the feeding trough, thereby delivering the material it carries to the feeding platform, realizing the transfer of material between the receiving component and the feeding component, thus making the use of this device simpler, more convenient and easier to implement.

[0027] (5) The material support seat of this device includes a second telescopic cylinder and a material support rod. When the stacking height of the remaining material on the feeding platform is lower than the loading station, the telescopic rod of the second telescopic cylinder extends to drive multiple material support rods to move toward the feeding platform until the multiple material support rods are respectively inserted into the multiple feeding slots on one side of the feeding platform, so that the multiple material support rods replace the feeding platform to support the remaining material. Then, the telescopic rod of the first telescopic cylinder retracts to drive the material support rods and the material they support to move vertically upward, so as to transport the remaining material to the loading station, thereby enabling the loading mechanism to achieve uninterrupted loading and further improve production efficiency.

[0028] (6) This device swings inward around the end of the swing arm assembly that is rotatably connected to the pre-folding base, causing the pressure plate to swing inward synchronously, so that the pressure plate performs a combination of moving towards the support seat and moving downward, thereby making the pressure plate bend the short side of the material downward and press it against the outer periphery of the support seat, thus making the pre-folding effect of the top cover paper better.

[0029] (7) The pre-folding mechanism of this device includes multiple support guide rods extending in the vertical direction. The multiple support guide rods are set between the pre-folding base and the support seat. The lifting seat is simultaneously sleeved on the outside of the multiple support guide rods and is slidably connected with the multiple support guide rods. Thus, when the third telescopic cylinder drives the lifting seat to lift, the multiple support guide rods guide the vertical movement of the lifting seat, making the vertical movement of the lifting seat more stable, thereby improving the stability of the pressure plate in folding the material.

[0030] (8) The suction cup seat of this device is equipped with two sets of suction cups. The two sets of suction cups are arranged at intervals along the horizontal direction on the suction cup seat. During the operation of the suction cup seat, the two sets of suction cups perform material adsorption or release operations at two work stations simultaneously, thereby reducing the travel of the suction cup seat to transfer materials, making the material transfer more efficient, and further improving production efficiency. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In these drawings, similar reference numerals are used to denote similar elements.

[0032] Figure 1 This is a schematic diagram of the structure of a top cover paper pre-folding device according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of a primary feeding component of a top cover paper pre-folding device according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of a top cover paper pre-folding device according to an embodiment of the present invention, in which the receiving assembly is mounted on a first frame;

[0035] Figure 4 This is a schematic diagram of the installation of the feeding assembly of a top cover paper pre-folding device on a first frame according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the secondary feeding component of a top cover paper pre-folding device according to an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the pre-folding mechanism of a top cover paper pre-folding device according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the structure of a pre-folding mechanism of a top cover paper pre-folding device according to an embodiment of the present invention, in which the pressure plate and swing rod assembly are hidden on one side;

[0039] Figure 8 This is a schematic diagram of the conveying mechanism of a top cover paper pre-folding device according to an embodiment of the present invention;

[0040] Figure 9 This is a comparison diagram of the top cover paper before and after pre-pressing in a top cover paper pre-folding device according to an embodiment of the present invention.

[0041] In the diagram: 1. Primary feeding assembly; 11. First frame; 111. Strip guide hole; 112. Strip clearance hole; 12. Receiving assembly; 121. First sliding cylinder; 122. Receiving seat; 123. Stop bar; 13. Feeding assembly; 131. First guide rail; 132. First slide; 133. Feeding drive assembly; 134. Feeding table; 1341. Feeding chute; 135. Feeding rod; 2. Secondary feeding assembly; 21. Second frame; 22. Second guide rail; 23. Second slide; 24. 1. Telescopic cylinder; 25. Second telescopic cylinder; 26. Material support rod; 3. Pre-folding mechanism; 31. Support seat; 32. Pressure plate; 33. Pre-folding base; 34. Third telescopic cylinder; 35. Lifting seat; 36. First swing arm; 37. Second swing arm; 38. Support guide rod; 4. Transport mechanism; 41. Third frame; 41. U-shaped guide groove; 42. Second sliding cylinder; 43. Third slide; 44. Third guide rail; 45. Connecting rod; 46. Rotary motor; 47. Third swing arm; 48. Suction cup seat. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1-9An embodiment of the present invention provides a top cover paper pre-folding device, including a feeding mechanism, a pre-folding mechanism 3 disposed on one side of the feeding mechanism, and a conveying mechanism 4 disposed above the pre-folding mechanism 3. The feeding mechanism has a receiving station at the bottom and a feeding station at the top. The feeding mechanism is used to transport materials from the receiving station to the feeding station. The pre-folding mechanism 3 has a pre-folding station at the top. The conveying mechanism 4 transfers the materials from the feeding station to the pre-folding station. The pre-folding mechanism 3 is used to fold the edges of the materials at the pre-folding station. After the pre-folding mechanism 3 completes the folding of the materials, the conveying mechanism 4 transfers the materials at the pre-folding station to the forming machine.

[0044] In this application, the top cover paper pre-folding device includes a feeding mechanism, a pre-folding mechanism 3, and a conveying mechanism 4. The pre-folding mechanism 3 is located on one side of the feeding mechanism, and the conveying mechanism 4 is located above the pre-folding mechanism 3. A receiving station is provided at the bottom of the feeding mechanism, where the feeding mechanism loads materials. A feeding station is provided at the top of the feeding mechanism, where, after loading the materials, the feeding mechanism conveys the materials from the receiving station to the feeding station.

[0045] It is foreseeable that in this application, the material loaded by the feeding mechanism at the receiving station can be the top cover paper used for making cigarette packaging boxes, or other paper sheets used for making packaging boxes.

[0046] A pre-folding station is set at the top of the pre-folding mechanism 3. The conveying mechanism 4 first transfers the material from the loading station to the pre-folding station, and then the pre-folding mechanism 3 folds the material at the pre-folding station, so that the pre-folding of the top cover paper is simple, convenient and easy to implement, thereby reducing the labor intensity of workers and improving production efficiency.

[0047] After the pre-folding mechanism 3 completes the folding of the material, the material at the pre-folding station is transferred to the inner box forming mechanism by the conveying mechanism 4. This reduces the transfer process after the top cover paper is pre-folded, reduces the risk of material damage, and thus reduces production costs.

[0048] In this embodiment, the feeding mechanism includes a primary feeding component 1 and a secondary feeding component 2. The pre-folding mechanism 3 is located on one side of the primary feeding component 1, and the secondary feeding component 2 is located on the other side of the primary feeding component 1. When pre-folding the top cover paper, a specified quantity of material is loaded at the receiving station at one time, and the specified quantity of material is stacked on the primary feeding component 1. The primary feeding component 1 conveys the specified quantity of material from the receiving station to the feeding station in a single operation.

[0049] In this application, in order to ensure the conveying efficiency of the feeding mechanism, the stacked height of the materials loaded in a single operation is greater than the height of the feeding station. That is, when the feeding component 1 conveys a specified number of materials from the receiving station to the feeding station in a single operation, the materials located at the top are in the feeding station, while the materials located at the bottom are below the feeding station.

[0050] After one material conveying cycle is completed, the primary feeding assembly 1 stops operating and supports the conveyed material, keeping the material in a state where the upper part of the material is in the middle of the feeding station and the lower part of the material is below the feeding station. Then, the material at the feeding station is transferred from top to bottom to the pre-folding station by the conveying mechanism 4. The pre-folding mechanism 3 folds the material transferred to the pre-folding station in sequence. During this process, the conveying mechanism 4 transfers the folded material at the pre-folding station to the inner box forming mechanism in sequence. Therefore, as the top cover paper is pre-folded, the stacking height of the material on the primary feeding assembly 1 gradually decreases.

[0051] When the stacked height of the materials is lower than the loading station, that is, the part of the materials above the loading station has been transferred to the pre-folding station by the handling mechanism 4 for folding, and the remaining part of the materials is below the loading station. At this time, the secondary loading component 2 takes over from the primary loading component 1 and transports the remaining part of the materials to the loading station. The primary loading component 1 then returns to the receiving station for the next material transport, so that the loading mechanism can achieve uninterrupted feeding and further improve production efficiency.

[0052] Specifically, in this embodiment, the primary loading assembly 1 includes a first frame 11, a receiving assembly 12, and a feeding assembly 13. The first frame 11 extends vertically, the receiving assembly 12 is located at the bottom of the first frame 11, and the feeding assembly 13 is located on one side of the receiving assembly 12. The receiving station is located at the bottom of the first frame 11. Initially, the receiving assembly 12 is located at the receiving station, thereby receiving the material and completing the loading of the material.

[0053] The loading station is located at the top of the first frame 11. After the material is loaded, the receiving component 12 moves horizontally on the first frame 11 to transport the material to the feeding component 13 on one side. Then, the feeding component 13 moves vertically on the first frame 11 to transport the material to the loading station, thereby realizing the material transport from the receiving station to the loading station.

[0054] Specifically, in this embodiment, the receiving assembly 12 includes a first sliding cylinder 121 and a receiving seat 122. The guide rail of the first sliding cylinder 121 is arranged horizontally on the first frame 11, and the receiving seat 122 is fixedly connected to the slide of the first sliding cylinder 121. Initially, the receiving seat 122 is located at the receiving station, thereby receiving the material and completing the loading of the material.

[0055] After the material transfer is completed, the first sliding cylinder 121 moves horizontally along its guide rail, driving the receiving seat 122 to move horizontally on the first frame 11 until the receiving seat 122 delivers the material it carries to the feeding assembly 13, thereby realizing the conveying of material from the receiving station to the feeding assembly 13.

[0056] Furthermore, in this embodiment, the receiving assembly 12 also includes a baffle rod 123 disposed on one side of the receiving seat 122, the baffle rod 123 being used to limit the material stacked on the receiving seat 122. In this application, when pre-folding the top cover paper, a specified quantity of material is loaded at the receiving station at one time, and the specified quantity of material is stacked on the receiving seat 122.

[0057] Therefore, in this application, a baffle rod 123 is provided on one side of the receiving seat 122. The baffle rod 123 extends vertically on the receiving seat 122, thereby limiting the material stacked on the receiving seat 122 to prevent the material from tipping over and affecting production efficiency.

[0058] It is foreseeable that in this application, the baffle rod 123 is located on the side of the receiving seat 122 away from the feeding component 13, so that during the process of the receiving seat 122 conveying the stacked materials to the feeding component 13, the baffle rod 123 limits the material and prevents the material from tipping over, further making the use of this device simple, convenient and easy to implement, thereby improving production efficiency.

[0059] Specifically, in this embodiment, the feeding assembly 13 includes a first guide rail 131, a first slide block 132, a feeding drive assembly 133, and a feeding seat. The first guide rail 131 is arranged vertically on the first frame 11, the first slide block 132 is slidably connected to the first guide rail 131, the feeding drive assembly 133 is connected to the first slide block 132, and the feeding seat is connected to the first slide block 132.

[0060] Initially, the feeding seat is located on one side of the receiving seat 122. When the receiving seat 122 moves horizontally on the first frame 11 and conveys the material it carries to one side, the feeding seat located on one side of the receiving seat 122 receives the material conveyed by the receiving seat 122. Then, through the operation of the feeding drive assembly 133, the first slide 132 is driven to move upward along the first guide rail 131. The first slide 132 drives the feeding seat and the material it carries to move vertically upward, thereby conveying the material to the loading station at the top of the first frame 11.

[0061] Furthermore, in this embodiment, the feeding seat includes a feeding platform 134 and a feeding rod 135. The feeding platform 134 has a feeding groove 1341 on one side. When the receiving seat 122 moves horizontally on the first frame 11 and conveys the material it carries to one side, it inserts into the feeding groove 1341, thereby delivering the material it carries to the feeding platform 134 and realizing the transfer of material between the receiving component 12 and the feeding component 13.

[0062] A strip-shaped guide hole 111 extending vertically is provided on the first frame 11. One end of the feeding rod 135 is fixedly connected to the first slide 132, and the other end passes through the strip-shaped guide hole 111 and is fixedly connected to the feeding table 134.

[0063] After the material on the feeding table 134 is received from the material on the material seat 122, the first slide 132 is driven to move upward along the first guide rail 131 by the feeding drive assembly 133. This causes the feeding rod 135 to move vertically upward along the strip guide hole 111, thereby driving the feeding table 134 and the material it carries to move vertically upward, and then transporting the material to the loading station at the top of the first frame 11.

[0064] During this process, the first frame 11 guides the feeding rod 135 through the strip guide hole 111, thereby improving the stability of the feeding rod 135 and the feeding table 134 in the vertical direction, and further improving the feeding stability of the feeding assembly 13, making the use of this device simpler, more convenient and easier to implement.

[0065] Specifically, in actual implementation, the receiving seat 122 can be designed to consist of multiple receiving rods extending horizontally. Correspondingly, multiple feeding troughs 1341 can be set on the side of the feeding platform 134 away from the feeding rods 135. When the receiving seat 122 moves horizontally on the first frame 11 and conveys the material it carries to one side, the multiple receiving rods used to carry the material are respectively inserted into the multiple feeding troughs 1341 on one side of the feeding platform 134.

[0066] At this time, by moving the receiving seat 122 on the first frame 11 away from the feeding table 134, multiple receiving rods are pulled out from multiple feeding slots 1341 respectively, so that the multiple receiving rods deliver the material they carry to the feeding table 134, making the transfer of material between the receiving assembly 12 and the feeding assembly 13 simpler, more convenient and easier to implement.

[0067] Specifically, in this application, the feeding drive assembly 133 includes a driving wheel, a driven wheel, a synchronous belt, and a drive motor. The driving wheel and the driven wheel are arranged vertically at intervals on the first frame 11. The two ends of the synchronous belt are respectively fitted onto the driving wheel and the driven wheel. The drive motor is connected to the driving wheel, thereby driving the synchronous belt to move around the driving wheel and the driven wheel. The first slide 132 is fixedly connected to the synchronous belt, thereby driving the first slide 132 to move up and down along the first guide rail 131 by the synchronous belt moving around the driving wheel and the driven wheel.

[0068] In this embodiment, the secondary feeding assembly 2 includes a second frame 21 and a material-bearing assembly. The second frame 21 is located on one side of the first frame 11, and the material-bearing assembly is mounted on the second frame 21 and can move vertically on the second frame 21. When the material delivered by the primary feeding assembly 1 to the feeding station is stacked to a height lower than the feeding station, the material-bearing assembly supports the remaining material.

[0069] The material-bearing assembly moves vertically upward on the second frame 21, thereby taking over from the primary feeding assembly 1 and conveying the remaining material to the feeding station. After the material-bearing assembly has carried the remaining material, the primary feeding assembly 1 can return to the receiving station for the next material conveying, thus enabling the feeding mechanism to achieve uninterrupted feeding and further improve production efficiency.

[0070] Specifically, in this embodiment, the material receiving assembly includes a second guide rail 22, a second slide block 23, a material receiving seat, and a first telescopic cylinder 24. The second guide rail 22 extends vertically on the second frame 21, the second slide block 23 is slidably connected to the second guide rail 22, the material receiving seat is disposed on the second slide block 23, and the first telescopic cylinder 24 is disposed on the second frame 21 and connected to the second slide block 23.

[0071] In this application, the cylinder seat of the first telescopic cylinder 24 is fixedly mounted on the second frame 21, and the telescopic rod is fixedly connected to the second slide block 23. Thus, when the telescopic rod of the first telescopic cylinder 24 extends or retracts, it drives the second slider to move up and down along the second guide rail 22, and then drives the material support seat to move in the vertical direction through the second slide block 23, so that the material support seat takes over from the feeding assembly 1 to transport the remaining material to the feeding station.

[0072] Furthermore, in this embodiment, the material support includes a second telescopic cylinder 25 and a material support rod 26. The second telescopic cylinder 25 is mounted on the second slide 23, and the material support rod 26 is connected to the second telescopic cylinder 25. Specifically, the cylinder seat of the second telescopic cylinder 25 is fixedly mounted on the second slide 23, and the telescopic rod is fixedly connected to the material support rod 26. Thus, when the telescopic rod of the second telescopic cylinder 25 extends, it drives the material support rod 26 to move towards the primary feeding assembly 1, so that the material support rod 26 supports the remaining material on the primary feeding assembly 1.

[0073] Then, by retracting the telescopic rod of the first telescopic cylinder 24, the second slide block 23 is driven to move upward on the second guide rail 22, which in turn drives the material support rod 26 and the material it supports to move vertically upward, so that the material support rod 26 takes over from the feeding assembly 1 and transports the remaining material to the feeding station.

[0074] As mentioned in the previous embodiments, a plurality of feeding slots 1341 are provided on the side of the feeding platform 134 away from the feeding rod 135, for the multiple receiving rods of the receiving seat 122 to insert into during the material transfer between the receiving assembly 12 and the feeding assembly 13. In this application, the plurality of feeding slots 1341 can extend vertically through the feeding platform 134, and the multiple receiving rods 26 are multiple and extend horizontally.

[0075] When the feeding drive assembly 133 operates, driving the feeding table 134 and the material it carries to move vertically upward to the designated position, part of the material carried on the feeding table 134 is located in the loading station and part is located below the loading station. At this time, the second feeding drive assembly 133 stops operating, so that the feeding table 134 supports the material it carries, keeping the material in a state where the upper part of the material is in the loading station and the lower part of the material is below the loading station.

[0076] As the top cover paper is pre-folded, the height of the material stacked on the feeding platform 134 gradually decreases. When the height of the remaining material stacked on the feeding platform 134 is lower than the loading station, the telescopic rod of the second telescopic cylinder 25 extends, driving multiple material support rods 26 to move toward the feeding platform 134 until the multiple material support rods 26 are respectively inserted into multiple feeding slots 1341 on one side of the feeding platform 134.

[0077] At this time, the feeding drive component 133 reverses its operation, driving the feeding table 134 to move downward on the first frame 11 for the next material conveying. Meanwhile, multiple support rods 26 replace the feeding table 134 to support the remaining material. Then, the telescopic rod of the first telescopic cylinder 24 retracts, driving the support rods 26 and the material they support to move vertically upward, conveying the remaining material to the loading station. This enables the loading mechanism to achieve uninterrupted feeding, further improving production efficiency.

[0078] Specifically, in actual implementation, a strip-shaped clearance hole 112 can be provided near the top of the first frame 11. The strip-shaped clearance hole 112 extends vertically, allowing multiple material-bearing rods 26 to pass through the strip-shaped clearance hole 112 and be inserted into multiple feeding troughs 1341 on one side of the feeding platform 134 in the first frame 11. The multiple material-bearing rods 26 can move up and down along the strip-shaped clearance hole 112, thereby driving the material they carry to move to the loading station.

[0079] In this embodiment, the pre-folding mechanism 3 includes a support base 31, a pressure plate 32, and a pre-folding drive assembly. The support base 31 is disposed on one side of the first frame 11, and the pre-folding station is disposed on top of the support base 31. When the conveying mechanism 4 transfers the material from the loading station to the pre-folding station, the support base 31 supports the material. The pressure plate 32 is disposed around the support base 31, and the pre-folding drive assembly is connected to the pressure plate 32. The pre-folding drive assembly drives the pressure plate 32 to move towards or away from the support base 31, so that the pressure plate 32 folds the material on the support base 31.

[0080] Specifically, in this application, the cross-sectional area of ​​the material is larger than the cross-sectional area of ​​the support base 31. When the conveying mechanism 4 moves the material from the loading station to the pre-folding station, the short sides of the material extend beyond the range of the support base 31. Four pressure plates 32 are respectively located around the support base 31. Initially, the four pressure plates 32 are positioned away from the support base 31, allowing the conveying mechanism 4 to place the material on the support base 31. During this process, the four pressure plates 32 around the support base 31 limit the material's movement, preventing it from deviating from its intended path.

[0081] After the material is placed on the support base 31, the pre-folding drive assembly simultaneously drives the four pressure plates 32 to move closer to the support base 31, so that the four pressure plates 32 bend the short sides of the material on all four sides until the short sides of the material are pressed against the outer periphery of the support base 31, thereby achieving the folding of the short sides of the material. After the material is folded, the pre-folding drive assembly then simultaneously drives the four pressure plates 32 to move away from the support base 31, waiting for the next folding operation.

[0082] In this embodiment, the pre-folding drive assembly includes a pre-folding base 33, a third telescopic cylinder 34, a lifting seat 35, and a swing arm assembly. The pre-folding base 33 and the support seat 31 are arranged parallel to each other in the vertical direction. The third telescopic cylinder 34 is disposed on the pre-folding base 33. The lifting seat 35 is connected to the third telescopic cylinder 34. One end of the swing arm assembly is rotatably connected to the pre-folding base 33, and the middle part is connected to the lifting seat 35. The pressure plate 32 is disposed at the end of the swing arm assembly away from the pre-folding base 33.

[0083] Specifically, the cylinder seat of the third telescopic cylinder 34 is fixedly mounted on the pre-folding base 33, and the telescopic rod extends vertically and is fixedly connected to the lifting seat 35. When the telescopic rod of the third telescopic cylinder 34 extends or retracts, it drives the lifting seat 35 to rise or fall vertically. This drives the swing arm assembly through the lifting seat 35 to swing around the end rotatably connected to the pre-folding base 33 at a certain angle, thereby causing the pressure plate 32 to move towards or away from the support seat 31, so that the pressure plate 32 folds the material on the support seat 31.

[0084] As mentioned in the previous embodiment, there are four pressure plates 32 respectively located around the support base 31. Therefore, in this embodiment, the third telescopic cylinder 34 is located at the center of the pre-folding base 33, and the swing rod assembly is four respectively encircling the third telescopic cylinder 34, so that one end of the four swing rod assemblies is rotatably connected to the four sides of the pre-folding base 33, and the middle part is rotatably connected to the four sides of the lifting base 35. The four pressure plates 32 are respectively located at the ends of the four swing rod assemblies away from the pre-folding base 33.

[0085] When the telescopic rod of the third telescopic cylinder 34 retracts and drives the lifting seat 35 to move vertically downward, the lifting seat 35 simultaneously drives the four swing rod assemblies to swing inward around the end that is rotatably connected to the pre-folding base 33, causing the four pressure plates 32 to move towards the support seat 31, so that the four pressure plates 32 simultaneously fold the short sides of the material.

[0086] When the telescopic rod of the third telescopic cylinder 34 extends and drives the lifting seat 35 to move vertically upward, the lifting seat 35 simultaneously drives the four swing rod assemblies to swing outward around the end that is rotatably connected to the pre-folding base 33, causing the four pressure plates 32 to move away from the support seat 31, waiting for the next folding operation.

[0087] In this application, the swing arm assembly swings inward around the end that is rotatably connected to the pre-folding base 33, causing the pressure plate 32 to swing inward synchronously. This causes the pressure plate 32 to perform a combination of moving towards the support base 31 and moving downward, thereby causing the pressure plate 32 to bend the short side of the material downward and press it against the outer periphery of the support base 31, thus improving the pre-folding effect of the top cover paper.

[0088] After the material is folded, the swing arm assembly swings outward around the end that is rotatably connected to the pre-folding base 33, causing the pressure plate 32 to swing outward synchronously. This causes the pressure plate 32 to perform a combination of moving away from the support base 31 and moving upward, so that the pressure plate 32 returns to its initial position and waits for the next folding operation.

[0089] Specifically, in this embodiment, the swing arm assembly includes a first swing arm 36 and a second swing arm 37. One end of the first swing arm 36 is rotatably connected to the side of the pre-folding base 33, and the other end is fixedly connected to the pressure plate 32. One end of the second swing arm 37 is rotatably connected to the side of the lifting seat 35, and the other end is rotatably connected to the middle of the first swing arm 36. Thus, during the lifting process of the lifting seat 35, the second swing arm 37 drives the first swing arm 36 to swing around the end rotatably connected to the pre-folding base 33 at a certain angle, thereby driving the pressure plate 32 to swing synchronously at a certain angle.

[0090] Furthermore, in this embodiment, the pre-folding mechanism 3 includes a plurality of support guide rods 38 extending in the vertical direction. The plurality of support guide rods 38 are disposed between the pre-folding base 33 and the support seat 31, and their two ends are fixedly connected to the pre-folding base 33 and the support seat 31 respectively. Thus, through the support of the plurality of support guide rods 38, the support seat 31 and the pre-folding base 33 are arranged parallel and spaced apart in the vertical direction.

[0091] In this application, the lifting seat 35 is simultaneously sleeved on the outside of multiple support guide rods 38 and slidably connected with the multiple support guide rods 38. Thus, when the third telescopic cylinder 34 drives the lifting seat 35 to lift, the multiple support guide rods 38 guide the vertical movement of the lifting seat 35, making the vertical movement of the lifting seat 35 more stable, thereby improving the stability of the pressure plate 32 in folding the material.

[0092] In this embodiment, the conveying mechanism 4 includes a third frame 41, a horizontal drive assembly, a vertical drive assembly, and a suction cup base 48. The third frame 41 is disposed above the support base 31, the horizontal drive assembly is disposed on the third frame 41, the vertical drive assembly is connected to the horizontal drive assembly, and the suction cup base 48 is connected to the vertical drive assembly.

[0093] The process of the conveying mechanism 4 transferring the material from the loading station to the pre-folding station and from the pre-folding station to the inner box forming machine is as follows: First, the vertical drive component runs, driving the suction cup seat 48 to descend, so that the suction cup seat 48 adsorbs the material.

[0094] Then, the vertical drive component operates, driving the suction cup seat 48 to rise, causing the material to rise synchronously. Then, the horizontal drive component operates, driving the vertical drive component and the suction cup seat 48 to move horizontally. Finally, the vertical mechanism operates, driving the suction cup seat 48 to fall, causing the suction cup seat 48 to release the material. This reduces the transfer process after the top cover paper is pre-folded, reduces the risk of material damage, and thus reduces production costs.

[0095] It is foreseeable that in this application, the suction cup base 48 is provided with a plurality of suction cups extending in the vertical direction. When the suction cups come into contact with the material, the material is adsorbed by the negative pressure generated by the suction cups. After the material is transferred to the designated position, the negative pressure generated by the suction cups is disconnected, so that the suction cups release the material, thereby reducing the loss of material during the transfer process and further reducing production costs.

[0096] In this embodiment, the horizontal drive assembly includes a second sliding cylinder 42 and a third slide block 43. The second sliding cylinder 42 is mounted on the third frame 41, and the third slide block 43 is mounted on the second sliding cylinder 42. Specifically, the guide rail of the second sliding cylinder 42 extends horizontally on the third frame 41, and the third slide block 43 is fixedly connected to the slide of the second sliding cylinder 42. Thus, when the slide of the second sliding cylinder 42 moves back and forth along the guide rail, it drives the third slide block 43 to move synchronously in the horizontal direction.

[0097] The vertical drive assembly is connected to the third slide 43, and the suction cup seat 48 is connected to the vertical drive assembly. Thus, as the third slide 43 moves in the horizontal direction, the vertical drive assembly is driven to move synchronously in the horizontal direction, and the suction cup seat 48 is driven to move synchronously in the horizontal direction through the vertical drive assembly.

[0098] In this embodiment, the vertical drive assembly includes a third guide rail 44, a U-shaped guide groove 411, a connecting rod 45, a rotary motor 46, and a third swing arm 47. The third guide rail 44 extends vertically and is slidably connected to the third slide block 43. The U-shaped guide groove 411 is disposed on the third frame 41. One end of the connecting rod 45 is slidably connected to the U-shaped guide groove 411, and the other end is fixedly connected to the third guide rail 44. The rotary motor 46 is disposed on the third frame 41. One end of the third swing arm 47 is fixedly connected to the rotary motor 46, and the other end is movably connected to the connecting rod 45. The suction cup seat 48 is fixedly connected to the third guide rail 44.

[0099] As mentioned in the previous embodiment, the suction cup base 48 is provided with multiple suction cups extending vertically. The negative pressure generated by the suction cups adsorbs the material, and the negative pressure generated by the suction cups releases the material. In this embodiment, the multiple suction cups on the suction cup base 48 are divided into two groups, and the two groups of suction cups are arranged at intervals along the horizontal direction on the suction cup base 48.

[0100] When the conveying mechanism 4 transfers materials, the rotary motor 46 reverses, driving the third swing arm 47 to swing counterclockwise around the end that is fixedly connected to the rotary motor 46. The third swing arm 47 drives the connecting rod 45 to move downward along the vertical groove on one side of the U-shaped guide groove 411. The connecting rod 45 drives the third guide rail 44 to move downward on the third slide block 43, thereby causing the suction cup seat 48 to descend. At this time, the first set of suction cups on the suction cup seat 48 adsorbs the material at the loading station, while the second set of suction cups adsorbs the material that has been pre-folded at the pre-folding station.

[0101] Then, by rotating the rotary motor 46 clockwise, the third swing arm 47 is driven to swing clockwise around the end that is fixedly connected to the rotary motor 46. The third swing arm 47 drives the connecting rod 45 to move upward along the vertical groove on one side of the U-shaped guide groove 411. The connecting rod 45 drives the third guide rail 44 to move upward on the third slide block 43, thereby driving the suction cup seat 48 to rise. At this time, the first set of suction cups and the second set of suction cups on the suction cup seat 48 simultaneously drive the adsorbed material to rise.

[0102] Then, the second sliding cylinder 42 is activated, driving the third slide block 43 to move horizontally. The third slide block 43 drives the third guide rail 44 to move horizontally, and the third guide rail 44 drives the suction cup seat 48 to move horizontally, so that the first set of suction cups on the suction cup seat 48 moves to the top of the pre-folding station, and the second set of suction cups moves to the top of the forming machine. At this time, the connecting rod 45 moves horizontally along the horizontal groove of the U-shaped guide groove 411, driving the third swing rod 47 to continue to swing clockwise.

[0103] Finally, the rotation of the rotary motor 46 drives the third swing arm 47 to swing clockwise around the end that is fixedly connected to the rotary motor 46. The third swing arm 47 drives the connecting rod 45 to move downward along the vertical groove on the other side of the U-shaped guide groove 411. The connecting rod 45 drives the third guide rail 44 to move downward on the third slide block 43, thereby causing the suction cup seat 48 to descend.

[0104] At this time, the first set of suction cups on the suction cup seat 48 will place the material adsorbed from the feeding station onto the support seat 31, while the second set of suction cups will place the material adsorbed from the pre-folding station into the inner box forming machine, thereby making the material transfer more efficient and further improving production efficiency.

[0105] It is foreseeable that a strip-shaped connecting hole is provided on the third swing arm 47, and the third swing arm 47 is movably connected to the connecting rod 45 through the strip-shaped connecting hole, so that when the third swing arm 47 swings clockwise or counterclockwise, it drives the connecting rod 45 to move along the U-shaped guide groove 411.

[0106] The above-described contents can be implemented individually or in various combinations, and these variations are all within the protection scope of this invention.

[0107] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A top cover paper pre-folding device, characterized in that: The system includes a feeding mechanism, a pre-folding mechanism (3) located on one side of the feeding mechanism, and a conveying mechanism (4) located above the pre-folding mechanism (3). The feeding mechanism has a receiving station at the bottom and a feeding station at the top. The feeding mechanism is used to transport materials from the receiving station to the feeding station. The pre-folding mechanism (3) has a pre-folding station at the top. The conveying mechanism (4) transfers the materials from the feeding station to the pre-folding station. The pre-folding mechanism (3) is used to fold the materials at the pre-folding station. After the pre-folding mechanism (3) completes the folding of the materials, the conveying mechanism (4) transfers the materials at the pre-folding station to the forming machine.

2. The top cover paper pre-folding device as described in claim 1, characterized in that: The feeding mechanism includes a primary feeding component (1) and a secondary feeding component (2) located on one side of the primary feeding component (1). The primary feeding component (1) feeds a specified number of materials at a time. When the height of the material fed by the primary feeding component (1) is lower than the feeding station, the secondary feeding component (2) takes over from the primary feeding component (1) and feeds the remaining material to the feeding station.

3. The top cover paper pre-folding device as described in claim 2, characterized in that: The primary loading assembly (1) includes a first frame (11) extending vertically, a receiving assembly (12) located at the bottom of the first frame (11), and a feeding assembly (13) located on one side of the receiving assembly (12). The receiving assembly (12) can move horizontally on the first frame (11) to receive materials at the receiving station and transport the materials to the feeding assembly (13). The feeding assembly (13) can move vertically on the first frame (11) to transport the materials to the loading station.

4. The top cover paper pre-folding device as described in claim 3, characterized in that: The receiving assembly (12) includes a first sliding cylinder (121) disposed on the first frame (11) and a receiving seat (122) fixedly connected to the first sliding cylinder (121). The receiving seat (122) is used to carry materials, and the first sliding cylinder (121) is used to drive the receiving seat (122) to move in the horizontal direction.

5. The top cover paper pre-folding device as described in claim 4, characterized in that: The receiving assembly (12) also includes a baffle rod (123) disposed on one side of the receiving seat (122), the baffle rod (123) being used to limit the material superimposed on the receiving seat (122).

6. The top cover paper pre-folding device as described in claim 3, characterized in that: The feeding assembly (13) includes a first guide rail (131) arranged vertically on the first frame (11), a first slide (132) slidably connected to the first guide rail (131), a feeding drive assembly (133) connected to the first slide (132), and a feeding seat connected to the first slide (132). The feeding seat is used to receive the material conveyed by the feeding assembly (13). The feeding drive assembly (133) drives the first slide (132) to move along the first guide rail (131), and the first slide (132) drives the feeding seat to move vertically.

7. The top cover paper pre-folding device as described in claim 6, characterized in that: The feeding seat includes a feeding platform (134) and a feeding rod (135) with one end fixedly connected to the first slide (132). The first frame (11) is provided with a strip-shaped guide hole (111) extending in the vertical direction. The feeding platform (134) is provided with a feeding groove (1341). The other end of the feeding rod (135) passes through the strip-shaped guide hole (111) and is fixedly connected to the feeding platform (134). The feeding assembly (13) can be inserted into the feeding groove (1341) so that the feeding platform (134) can receive the material conveyed by the feeding assembly (13).

8. The top cover paper pre-folding device as described in claim 2, characterized in that: The secondary feeding assembly (2) includes a second frame (21) located on one side of the primary feeding assembly (1) and a material-bearing assembly located on the second frame (21). The material-bearing assembly can move vertically on the second frame (21) to replace the primary feeding assembly (1) in conveying the remaining material to the feeding station.

9. A pre-folding device for top cover paper as described in claim 8, characterized in that: The material receiving assembly includes a second guide rail (22) extending vertically on the second frame (21), a second slide block (23) slidably connected to the second guide rail (22), a material receiving seat disposed on the second slide block (23), and a first telescopic cylinder (24) disposed on the second frame (21). The first telescopic cylinder (24) is connected to the second slide block (23) to drive the second slide block (23) to move along the second guide rail (22). The second slide block (23) drives the material receiving seat to move vertically, so that the material receiving seat takes over from the primary feeding assembly (1) to transport the remaining material to the feeding station.

10. A pre-folding device for top cover paper as described in claim 9, characterized in that: The material support includes a second telescopic cylinder (25) mounted on the second slide (23) and a material support rod (26) connected to the second telescopic cylinder (25). The second telescopic cylinder (25) drives the material support rod (26) to move in the horizontal direction so that the material support rod (26) supports the material conveyed by the primary feeding assembly (1).

11. A pre-folding device for top cover paper as described in claim 1, characterized in that: The pre-folding mechanism (3) includes a support base (31) located on one side of the feeding mechanism, a pressure plate (32) located around the support base (31), and a pre-folding drive assembly connected to the pressure plate (32). The support base (31) is used to support the material. The pre-folding drive assembly drives the pressure plate (32) to move toward or away from the support base (31) so that the pressure plate (32) folds the material on the support base (31).

12. The top cover paper pre-folding device as described in claim 11, characterized in that: The pre-folding drive assembly includes a pre-folding base (33) arranged parallel to and spaced apart from the support base (31), a third telescopic cylinder (34) disposed on the pre-folding base (33), a lifting seat (35) connected to the third telescopic cylinder (34), and a swing rod assembly with one end rotatably connected to the pre-folding base (33) and the middle part rotatably connected to the lifting seat (35). The third telescopic cylinder (34) drives the lifting seat (35) to move up and down in the vertical direction. The pressure plate (32) is disposed at the end of the swing rod assembly away from the pre-folding base (33). The lifting seat (35) drives the swing rod assembly to swing, so as to move the pressure plate (32) toward or away from the support base (31).

13. A pre-folding device for top cover paper as described in claim 12, characterized in that: The swing arm assembly includes a first swing arm (36) with one end rotatably connected to the pre-folding base (33) and the other end fixedly connected to the pressure plate (32), and a second swing arm (37) with one end rotatably connected to the lifting seat (35) and the other end rotatably connected to the middle of the first swing arm (36).

14. The top cover paper pre-folding device as described in claim 1, characterized in that: The conveying mechanism (4) includes a third frame (41) disposed above the pre-folding mechanism (3), a horizontal drive assembly disposed on the third frame (41), a vertical drive assembly connected to the horizontal drive assembly, and a suction cup seat (48) connected to the vertical drive assembly. The suction cup seat (48) is used to adsorb or release materials. The vertical drive assembly is used to drive the suction cup seat (48) to move up and down in the vertical direction. The horizontal drive assembly is used to drive the suction cup seat (48) to move in the horizontal direction.

15. A top cover paper pre-folding device as described in claim 14, characterized in that: The horizontal drive assembly includes a second sliding cylinder (42) mounted on the third frame (41) and a third slide block (43) mounted on the second sliding cylinder (42), and the vertical drive assembly is connected to the third slide block (43).

16. A pre-folding device for top cover paper as described in claim 15, characterized in that: The vertical drive assembly includes a third guide rail (44) extending in the vertical direction, a U-shaped guide groove (411) disposed on the third frame (41), a connecting rod (45) with one end slidably connected to the U-shaped guide groove (411) and the other end fixedly connected to the third guide rail (44), a rotary motor (46) disposed on the third frame (41), and a third swing rod (47) with one end fixedly connected to the rotary motor (46) and the other end movably connected to the connecting rod (45). The third guide rail (44) is slidably connected to the third slide (43), and the suction cup seat (48) is fixedly connected to the third guide rail (44).

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