A packaging device for synchronously folding inward four sides of a paper gift box

Abstract

This invention discloses a packaging device for paper gift boxes that allows for simultaneous inward folding of all four sides, relating to the field of packaging box packaging technology. It includes a sliding base, with side plates fixedly connected to both sides of the top of the sliding base. A movable seat is slidably connected inside the sliding base, and a support plate is provided on the top of the movable seat. Mounting plates are fixedly connected to the top of both side plates, and first rotating rods are rotatably connected inside both mounting plates. First swing rods are fixedly connected to both ends of the first rotating rods, and first pressure plates are fixedly connected to one end of each of the two first swing rods. A limiting block is fixedly connected to one side of each first swing rod, and a sliding rod is slidably connected inside the limiting block. This packaging device for paper gift boxes that allows for simultaneous inward folding of all four sides significantly improves the packaging efficiency of gift boxes, ensures consistent folding angles on all four sides and neat shaping, and effectively solves the problems of misalignment and asymmetry in gift box packaging.

Description

Technical Field

[0001] This invention relates to the field of packaging box sealing technology, specifically a sealing device for paper gift boxes that allows all four sides to close inward simultaneously. Background Technology

[0002] Paper gift boxes are the core containers for gift packaging and merchandise storage. Their sealing quality directly affects the aesthetics and safety of the packaging. Simultaneous four-sided sealing is a key process for the efficient forming of paper gift boxes, and the degree of automation and sealing accuracy of this process are closely related to the production efficiency and the pass rate of finished products. During the sealing process, paper gift boxes need to be sealed by simultaneous four-sided sealing to ensure that the gift boxes are formed neatly and sealed firmly.

[0003] Most existing paper gift box sealing devices only fold and seal the gift box one side at a time. However, in the actual forming process, the four sides of the paper gift box need to be folded inward simultaneously, which does not guarantee the sealing efficiency and forming effect of the paper gift box.

[0004] In the prior art, Chinese Patent No. CN222136084U discloses a high-efficiency carton folding device for carton processing, including a base plate, a support platform fixedly installed on the upper surface of the base plate, a support platform fixedly installed on the upper surface of the base plate, and a flipping mechanism provided inside the support platform.

[0005] The aforementioned patent mainly uses a folding cylinder to drive the folding plate to complete the folding on one side at a time. This can only achieve sequential sealing on one side and cannot achieve simultaneous inward folding of all four sides of the gift box. Therefore, it does not effectively improve the sealing efficiency and forming regularity of paper gift boxes. Summary of the Invention

[0006] The purpose of this invention is to provide a packaging device for paper gift boxes that allows all four sides to close inward simultaneously, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a sealing device for a paper gift box that simultaneously closes inward on all four sides, comprising a sliding base, side plates fixedly connected to both sides of the top of the sliding base, a movable seat slidably connected inside the sliding base, a support plate provided on the top of the movable seat, mounting plates fixedly connected to the top of the two side plates, first rotating rods rotatably connected inside the two mounting plates, first swing rods fixedly connected to both ends of the first rotating rods, first pressure plates fixedly connected to one end of the two first swing rods, a limit block fixedly connected to one side of the first swing rod, a sliding rod slidably connected inside the limit block, a second pressure plate fixedly connected to one end of the sliding rod, the second pressure plate being disposed inside the first pressure plate, an inclined plate fixedly connected to the rear end of the sliding rod, and a first spring sleeved on the outside of the sliding rod, the two ends of the first spring being fixedly connected to the second pressure plate and the limit block respectively.

[0008] Preferably, each of the two side plates is fixedly connected to a slide rail at its top. A limiting groove is formed inside the slide rail, and a slider is slidably connected inside the limiting groove. A horizontal plate is fixedly connected to the top of the slider, and a vertical rod is fixedly connected to one end of the horizontal plate, so that the horizontal plate and the vertical rod can slide horizontally.

[0009] Preferably, a push plate is fixedly connected to the bottom of the slider, a baffle is fixedly connected to the bottom of the slide rail, a second spring is fixedly connected between the baffle and the push plate, a first toothed plate is fixedly connected to the front side of the push plate, a first gear is fixedly connected to the outer side of the first rotating rod, and the first toothed plate meshes with the first gear, so that when the slider moves, it drives the first gear to rotate and drives the first rotating rod to rotate.

[0010] Preferably, electric guide rails are installed on both sides of the sliding base, and a moving frame is installed at the moving end of each of the two electric guide rails. A top plate is fixedly connected between the top ends of the two moving frames, and a first hydraulic cylinder is fixedly connected to the top of the top plate. The output end of the first hydraulic cylinder passes through the top plate and is slidably connected to the top plate, so that the first hydraulic cylinder drives the fixed plate to upgrade.

[0011] Preferably, a fixing plate is fixedly connected to the bottom of the output end of the first hydraulic cylinder, a plurality of suction cups are fixedly connected to the bottom of the fixing plate, a plurality of air pumps are fixedly connected to the top of the top plate, and air guide pipes are fixedly connected to the air pumps at their respective air pump ends. The air guide pipes pass through the fixing plate and are connected to the plurality of suction cups, so that the air pumps can be started to draw a vacuum inside the suction cups through the air guide pipes and thereby adsorb the packaging cardboard for easy transfer.

[0012] Preferably, a connecting plate is fixedly connected to the outer side of the output end of the first hydraulic cylinder. A first pressure rod is fixedly connected to both ends of the connecting plate. A second pressure rod is fixedly connected to one end of each of the two first pressure rods. The two first pressure rods correspond to the top ends of the two vertical rods respectively, and the two second pressure rods correspond to the four inclined plates respectively. When the first pressure rod descends, it pushes the vertical rod to slide horizontally, and the second pressure rods press down to move the inclined plates, causing the inclined plates to drive the sliding rods to slide.

[0013] Preferably, connecting blocks are fixedly connected to both ends of the top of the support plate, and a second rotating rod is rotatably connected inside the two connecting blocks. A third pressure plate is fixedly connected to the outside of the second rotating rod, and a second gear is fixedly connected to the outside of the second rotating rod, so that the rotation of the second gear causes the low-profile second rotating rod and the third pressure plate to rotate.

[0014] Preferably, both ends of the top of the movable seat are fixedly connected to sliding sleeves, and both sliding sleeves are slidably connected to lifting rods. The top ends of both lifting rods are fixedly connected to pull plates, and the top ends of both pull plates are fixedly connected to second toothed plates. The second toothed plates are meshed with second gears. Both sides of the bottom of the pull plates are fixedly connected to tension springs, and the bottom ends of the two tension springs are fixedly connected to the movable seat to limit the movement of the pull plates.

[0015] Preferably, limit plates are fixedly connected to both sides of the support plate, and four limit rods are fixedly connected to the top of the movable seat. The four limit rods pass through the four limit plates and are slidably connected to the four limit plates. A third spring is sleeved on the outside of the limit rods. The two ends of the third spring are fixedly connected to the limit plates and the movable seat, respectively. A threaded rod is rotatably connected inside the sliding base. The threaded rod passes through the movable seat and is threadedly connected to the movable seat. A motor is fixedly connected to one end of the sliding base. The output end of the motor is fixedly connected to the threaded rod, so that the motor starts and drives the threaded rod to rotate, thereby driving the movable seat to move horizontally.

[0016] Preferably, one of the side panels is fixedly connected to an L-shaped plate on one side, and a second hydraulic cylinder is fixedly connected to one side of the L-shaped plate. A movable plate is fixedly connected to the output end of the second hydraulic cylinder. The output end of the movable plate is inside the side panel. The other side panel has a discharge port inside, which corresponds to the movable plate. This allows the second hydraulic cylinder to be activated, driving the movable plate to move and push out the folded gift box for easy unloading.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This application achieves synchronous inward pressing of the four sides of a paper gift box by coordinating the action of the first pressure plate, the second pressure plate and the third pressure plate, and cooperating with the transmission of the first rotating rod and the first swing rod. Compared with the traditional method of folding one side in sequence, it greatly improves the packaging efficiency of the gift box, ensures that the folding angle of the four sides is consistent and the forming is neat, and effectively solves the problems of misalignment and asymmetry in the packaging of gift boxes.

[0018] 2. After folding, the first hydraulic cylinder is activated and reset, the support plate rises again, the tension spring resets and pulls the pull plate downward, causing the third pressure plate to flip and reset. Then, the fixed plate rises, causing the first and second pressure rods to rise again. The second pressure rod disengages from the inclined plate, the first spring pushes the second pressure plate to re-engage with the first pressure plate, and the second spring pushes the push plate backward. The push plate drives the first toothed plate to move and rotate the first gear, thereby causing the first gear to drive the first rotating rod and the first swing rod to flip and reset, separating them from the cardboard box. The motor is then activated and drives the threaded rod to rotate, causing the threaded rod to move the moving seat to the discharge port side. The second hydraulic cylinder is activated and drives the moving plate to move, causing the moving plate to push the cardboard box away from the support plate for easy unloading.

[0019] 3. This application uses a second hydraulic cylinder, a moving plate, and a discharge port to form an automatic discharge structure. With the help of a motor and a threaded rod to drive the moving seat to shift, the gift box can be automatically unloaded after packaging. No manual handling is required throughout the process, realizing full automation of the gift box packaging process, reducing labor costs, and improving the intelligence level of the production line. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the mobile frame of the present invention; Figure 3 This is a schematic diagram of the top plate of the present invention; Figure 4 This is a schematic diagram of the discharge port structure of the present invention; Figure 5 This is a schematic diagram of the support plate of the present invention; Figure 6 This is a schematic diagram of the structure of the fixing plate of the present invention; Figure 7 This is a schematic diagram of the structure of the horizontal plate of the present invention; Figure 8 This is a schematic diagram of the structure of the first pressure plate of the present invention; Figure 9 This is a schematic diagram of the support plate of the present invention; Figure 10 This is a schematic diagram of the structure of the movable base of the present invention; Figure 11 This is a schematic diagram of the structure of the first pressure bar of the present invention; Figure 12 This is a schematic diagram of the structure of the second gear of the present invention; Figure 13 This is a schematic diagram of the structure of the third pressure plate of the present invention; Figure 14 This is a schematic diagram of the structure of the movable plate of the present invention; Figure 15 This is a plan view of the packaging box cardboard of the present invention.

[0021] The diagram shows the following components: 1. Sliding base; 2. Side plate; 3. Movable seat; 4. Support plate; 5. Mounting plate; 6. First rotating rod; 7. First swing rod; 8. First pressure plate; 9. Limiting block; 10. Slide rod; 11. First spring; 12. Second pressure plate; 13. Slide rail; 14. Limiting groove; 15. Slider; 16. Horizontal plate; 17. Vertical rod; 18. Push plate; 19. Second spring; 20. First toothed plate; 21. First gear; 22. Inclined plate; 23. Electric guide rail; 24. Movable frame; 25. Top plate; 26. First hydraulic cylinder; 27. 1. Connecting plate; 28. First pressure rod; 29. ​​Second pressure rod; 30. Fixing plate; 31. Suction cup; 32. Limiting plate; 33. Air pump; 34. Air guide pipe; 35. Connecting block; 36. Second rotating rod; 37. Third pressure plate; 38. Second gear; 39. Sliding sleeve; 40. Lifting rod; 41. Pull plate; 42. Second toothed plate; 43. Tension spring; 44. Limiting rod; 45. Third spring; 46. Threaded rod; 47. Motor; 48. L-shaped plate; 49. Second hydraulic cylinder; 50. Moving plate; 51. Discharge port; 52. Baffle. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0023] Example: Figures 1-15As shown, the present invention provides a technical solution for a sealing device for a paper gift box that closes inwards from all four sides simultaneously. It includes a sliding base 1, with side plates 2 fixedly connected to both sides of the top of the sliding base 1. A movable seat 3 is slidably connected inside the sliding base 1, and a support plate 4 is provided on the top of the movable seat 3. Mounting plates 5 are fixedly connected to the top of both side plates 2. First rotating rods 6 are rotatably connected inside both mounting plates 5. First swing rods 7 are fixedly connected to both ends of the first rotating rods 6. First pressure plates 8 are fixedly connected to one end of each of the first swing rods 7. A limiting block 9 is fixedly connected to one side of the first swing rod 7. A sliding rod 10 is slidably connected inside the limiting block 9. A second pressure plate 12 is fixedly connected to one end of the sliding rod 10, and the second pressure plate 12 is disposed inside the first pressure plate 8. An inclined plate 22 is fixedly connected to the rear end of the sliding rod 10. A first spring 11 is sleeved on the outside of the sliding rod 10, and both ends of the first spring 11 are fixedly connected to the second pressure plate 12 and the limiting block 9, respectively.

[0024] Both side plates 2 are fixedly connected to the top of a slide rail 13. A limit groove 14 is opened inside the slide rail 13. A slider 15 is slidably connected inside the limit groove 14. A horizontal plate 16 is fixedly connected to the top of the slider 15. A vertical rod 17 is fixedly connected to one end of the horizontal plate 16, so that the horizontal plate 16 and the vertical rod 17 can slide horizontally. A push plate 18 is fixedly connected to the bottom of the slider 15. A baffle 52 is fixedly connected to the bottom of the slide rail 13. A second spring 19 is fixedly connected between the baffle 52 and the push plate 18. A first toothed plate 20 is fixedly connected to the front side of the push plate 18. A first gear 21 is fixedly connected to the outside of the first rotating rod 6. The first toothed plate 20 and the first gear 21 mesh with each other, so that when the slider 15 moves, it drives the first gear 21 to rotate and drives the first rotating rod 6 to rotate.

[0025] Electric guide rails 23 are installed on both sides of the sliding base 1. A movable frame 24 is installed at the moving end of each of the two electric guide rails 23. A top plate 25 is fixedly connected between the top ends of the two movable frames 24. A first hydraulic cylinder 26 is fixedly connected to the top of the top plate 25. The output end of the first hydraulic cylinder 26 passes through the top plate 25 and is slidably connected to it, allowing the first hydraulic cylinder 26 to drive the fixed plate 30 to move. A fixed plate 30 is fixedly connected to the bottom end of the output end of the first hydraulic cylinder 26. Multiple suction cups 31 are fixedly connected to the bottom of the fixed plate 30. Multiple air pumps 33 are fixedly connected to the top of the top plate 25. Air guide pipes 34 are fixedly connected to the suction ends of the multiple air pumps 33, and the multiple air guide pipes 34 pass through the fixed plate 30 and are slidably connected to it. Multiple suction cups 31 are connected, which enables the air pump 33 to start and evacuate the inside of the suction cups 31 through the air guide pipe 34 to adsorb the packaging cardboard for easy transfer. A connecting plate 27 is fixedly connected to the outer side of the output end of the first hydraulic cylinder 26. A first pressure rod 28 is fixedly connected to both ends of the connecting plate 27. A second pressure rod 29 is fixedly connected to one end of each of the two first pressure rods 28. The two first pressure rods 28 correspond to the top ends of the two vertical rods 17 respectively. The two second pressure rods 29 correspond to the four inclined plates 22 respectively. When the first pressure rod 28 descends, it pushes the vertical rod 17 to slide horizontally, and the second pressure rods 29 press down to move the inclined plates 22, causing the inclined plates 22 to drive the sliding rod 10 to slide.

[0026] Both ends of the top of the support plate 4 are fixedly connected to connecting blocks 35. A second rotating rod 36 is rotatably connected inside the two connecting blocks 35. A third pressure plate 37 is fixedly connected to the outside of the second rotating rod 36. A second gear 38 is fixedly connected to the outside of the second rotating rod 36, causing the second rotating rod 36 and the third pressure plate 37 to rotate. Both ends of the top of the movable seat 3 are fixedly connected to sliding sleeves 39. Lifting rods 40 are slidably connected inside the two sliding sleeves 39. Pull plates 41 are fixedly connected to the top of the two lifting rods 40. Second toothed plates 42 are fixedly connected to the top of the two pull plates 41, meshing with the second gear 38. Tension springs 43 are fixedly connected to both sides of the bottom of the pull plates 41. The sliding base 1 is fixedly connected to the movable base 3, and the pull plate 41 is limited. Limiting plates 32 are fixedly connected to both sides of the support plate 4. Four limiting rods 44 are fixedly connected to the top of the movable base 3. The four limiting rods 44 pass through the four limiting plates 32 and are slidably connected to the four limiting plates 32. A third spring 45 is sleeved on the outside of the limiting rods 44. The two ends of the third spring 45 are fixedly connected to the limiting plates 32 and the movable base 3, respectively. A threaded rod 46 is rotatably connected inside the sliding base 1. The threaded rod 46 passes through the movable base 3 and is threadedly connected to the movable base 3. A motor 47 is fixedly connected to one end of the sliding base 1. The output end of the motor 47 is fixedly connected to the threaded rod 46, so that the motor 47 starts and drives the threaded rod 46 to rotate, and drives the movable base 3 to move horizontally.

[0027] One of the side plates 2 is fixedly connected to an L-shaped plate 48, and a second hydraulic cylinder 49 is fixedly connected to one side of the L-shaped plate 48. A movable plate 50 is fixedly connected to the output end of the second hydraulic cylinder 49. The output end of the movable plate 50 is inside the side plate 2. The other side plate 2 has a discharge port 51 inside. The discharge port 51 corresponds to the movable plate 50, so that the second hydraulic cylinder 49 is activated to drive the movable plate 50 to move and push out the folded gift box for easy unloading.

[0028] In use, this system uses an electric guide rail 23 to control the horizontal movement of the moving frame 24 and the top plate 25. As the top plate 25 moves, it drives the first hydraulic cylinder 26 and the fixed plate 30 to move as well. The first hydraulic cylinder 26 controls the fixed plate 30 to descend, causing multiple suction cups 31 to contact the stacked cardboard. An air pump 33 activates, causing the suction cups 31 to pick up the cardboard and move it above the support plate 4, aligning it with the support plate 4. The initial position of the support plate 4 is between the two mounting plates 5. Activating the first hydraulic cylinder 26 then causes the cardboard to descend and fall into the support plate 4. First, the folded edges d and e on the front and rear sides of the cardboard are lowered, and the two folded edges e contact the side plates 2 on both sides. Then, the two folded edges e are folded towards d, and the side plates 2 on both sides limit and block the folded edges b on the left and right sides of the cardboard, so that the folded edges b on the left and right sides of the cardboard are flipped up, so that the two folded edges b are in contact with the outer side of the folded edges e. At the same time, when the first hydraulic cylinder 26 controls the fixed plate 30 to descend, it drives the connecting plate 27 to descend synchronously. The connecting plate 27 drives the first pressure rods 28 on both sides to descend, so that the two first pressure rods 28 contact the top of the vertical rods 17 on both sides and push them down. The two vertical rods 17 move relative to each other, causing the horizontal plate 16 and the slider 15 to move. As the slider 15 moves, it drives the push plate 18 to move, which in turn drives the first gear 21 to rotate. When the first gear plate 20 rotates, it drives the first gear 21 to rotate, causing the first gear 21 to drive the first rotating rod 6 to rotate. When the first rotating rod 6 rotates, it drives the first swing rod 7 and the first pressure plate 8 to rotate, causing the first swing rod 7 and the first pressure plate 8 to flip inwards to the inside of the two side plates 2, thus folding the folded edges c above the left and right folded edges b a second time, and then folding the second-folded edges c towards the center. The box is flipped over so that the inner sides of sides c and b are aligned, and the folded edge e is sandwiched between the folded edges b and d. This presses the left and right sides of the packaging box together. At the same time, the first pressure rod 28 drives the second pressure rod 29 to descend, causing the second pressure rod 29 to press down on the inclined plate 22. This pushes the inclined plate 22 to move outward, which in turn causes the inclined plate 22 to move the slide rod 10 horizontally. The slide rod 10 then causes the second pressure plate 12 to slide outward, pressing the folded edge c again. This limits the folded edge e to its position, thus supporting and shaping the folded edge of the gift box.

[0029] The cardboard is pressed down, causing the support plate 4 to descend, which in turn causes the limit plates 32 on both sides to descend. At the same time, the third spring 45 is pressed down to support the support plate 4. The support plate 4 also causes the connecting block 35 and the second rotating rod 36 to descend, while simultaneously causing the second gear 38 to move to the side of the second toothed plate 42. The second gear 38 rotates under the limit of the second toothed plate 42, thereby causing the third pressure plate 37 to flip. The third pressure plate 37 pushes the folding edge f inward, forming the gift box and automatically closing and sealing all four sides simultaneously. After the third pressure plate 37 flips, the second toothed plate 42 will cause the lifting rod 40 to slide inside the sliding sleeve 39 to adapt to the folding height. This device, through the coordinated action of the first pressure plate 8, the second pressure plate 12 and the third pressure plate 37, and in conjunction with the transmission of the first rotating rod 6 and the first swing rod 7, can realize the synchronous inward pressing of the four sides of the paper gift box. Compared with the traditional method of folding one side in sequence, it greatly improves the packaging efficiency of the gift box, ensures that the folding angles of the four sides are consistent and the forming is neat, and effectively solves the problems of misalignment and asymmetry in the packaging of gift boxes.

[0030] After folding, the first hydraulic cylinder 26 is activated and reset, the support plate 4 rises again, the tension spring 43 resets and pulls the pull plate 41 downward, causing the third pressure plate 37 to flip and reset. Then, the fixing plate 30 rises, causing the first pressure rod 28 and the second pressure rod 29 to rise again. The second pressure rod 29 disengages from the inclined plate 22, the first spring 11 pushes the second pressure plate 12 to fit against the first pressure plate 8 and reset, the second spring 19 pushes the push plate 18 to move backward, the push plate 18 drives the first toothed plate 20 to move and drive the first gear 21 to rotate, thereby causing the first gear 21 to drive the first rotating rod 6 and the first swing rod 7 to flip and reset, separating them from the cardboard box. The motor 47 is activated and drives the threaded rod 46 to rotate, causing the threaded rod 46 to drive the moving seat 3 to move to the side of the discharge port 51. The second hydraulic cylinder 49 is activated and drives the moving plate 50 to move, causing the moving plate 50 to push the cardboard box away from the support plate 4 for easy unloading.

[0031] This device forms an automatic unloading structure through the second hydraulic cylinder 49, the moving plate 50 and the discharge port 51. With the help of the motor 47 and the threaded rod 46, the moving seat 3 is moved. After the gift box is sealed, it can be automatically unloaded. No manual handling is required throughout the process, realizing full automation of the gift box sealing process, reducing labor costs and improving the intelligence level of the production line.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A sealing device for a paper gift box that closes inwards from all four sides simultaneously, comprising a sliding base (1), wherein side plates (2) are fixedly connected to both sides of the top of the sliding base (1), characterized in that: The sliding base (1) is slidably connected to a movable seat (3). The movable seat (3) is provided with a support plate (4) on its top. The tops of the two side plates (2) are fixedly connected to mounting plates (5). The two mounting plates (5) are rotatably connected to a first rotating rod (6). The two ends of the first rotating rod (6) are fixedly connected to a first swing rod (7). The two ends of the first swing rod (7) are fixedly connected to a first pressure plate (8). The first swing rod (7) is fixedly connected to a limit block (9) on one side. The limit block (9) is slidably connected to a slide rod (10). The slide rod (10) is fixedly connected to a second pressure plate (12) on one end. The second pressure plate (12) is located inside the first pressure plate (8). The rear end of the slide rod (10) is fixedly connected to an inclined plate (22). The slide rod (10) is sleeved with a first spring (11). The two ends of the first spring (11) are fixedly connected to the second pressure plate (12) and the limit block (9) respectively.

2. The sealing device for a paper gift box that simultaneously closes inward on all four sides according to claim 1, characterized in that: The top of each of the two side plates (2) is fixedly connected to a slide rail (13). A limit groove (14) is opened inside the slide rail (13). A slider (15) is slidably connected inside the limit groove (14). A horizontal plate (16) is fixedly connected to the top of the slider (15). A vertical rod (17) is fixedly connected to one end of the horizontal plate (16).

3. The sealing device for a paper gift box that simultaneously closes inward on all four sides according to claim 2, characterized in that: The bottom of the slider (15) is fixedly connected to a push plate (18), the bottom of the slide rail (13) is fixedly connected to a baffle (52), a second spring (19) is fixedly connected between the baffle (52) and the push plate (18), a first toothed plate (20) is fixedly connected to the front side of the push plate (18), a first gear (21) is fixedly connected to the outside of the first rotating rod (6), and the first toothed plate (20) meshes with the first gear (21).

4. The sealing device for a paper gift box that simultaneously closes inward on all four sides according to claim 1, characterized in that: Electric guide rails (23) are installed on both sides of the sliding base (1). A moving frame (24) is installed on the moving end of each of the two electric guide rails (23). A top plate (25) is fixedly connected between the top ends of the two moving frames (24). A first hydraulic cylinder (26) is fixedly connected to the top of the top plate (25). The output end of the first hydraulic cylinder (26) passes through the top plate (25) and is slidably connected to the top plate (25).

5. The sealing device for a paper gift box that simultaneously closes inward on all four sides according to claim 4, characterized in that: A fixed plate (30) is fixedly connected to the bottom of the output end of the first hydraulic cylinder (26). Multiple suction cups (31) are fixedly connected to the bottom of the fixed plate (30). Multiple air pumps (33) are fixedly connected to the top of the top plate (25). Each of the multiple air pumps (33) has a fixed air guide pipe (34) at its air extraction end. Each of the multiple air guide pipes (34) passes through the fixed plate (30) and is connected to the multiple suction cups (31).

6. The sealing device for a paper gift box that simultaneously closes inward on all four sides according to claim 4, characterized in that: A connecting plate (27) is fixedly connected to the outer side of the output end of the first hydraulic cylinder (26). A first pressure rod (28) is fixedly connected to both ends of the connecting plate (27). A second pressure rod (29) is fixedly connected to one end of each of the two first pressure rods (28). The two first pressure rods (28) correspond to the top ends of the two vertical rods (17) respectively, and the two second pressure rods (29) correspond to the four inclined plates (22) respectively.

7. The sealing device for a paper gift box that simultaneously closes inward on all four sides according to claim 1, characterized in that: Both ends of the top of the support plate (4) are fixedly connected to connecting blocks (35), and the two connecting blocks (35) are rotatably connected to a second rotating rod (36). A third pressure plate (37) is fixedly connected to the outside of the second rotating rod (36), and a second gear (38) is fixedly connected to the outside of the second rotating rod (36).

8. The sealing device for a paper gift box that simultaneously closes inward on all four sides according to claim 1, characterized in that: The top two ends of the movable seat (3) are fixedly connected to sliding sleeves (39), and the two sliding sleeves (39) are slidably connected to lifting rods (40). The top ends of the two lifting rods (40) are fixedly connected to pull plates (41), and the top ends of the two pull plates (41) are fixedly connected to second toothed plates (42). The second toothed plates (42) are meshed with the second gear (38). The bottom sides of the pull plates (41) are fixedly connected to tension springs (43), and the bottom ends of the two tension springs (43) are fixedly connected to the movable seat (3).

9. The sealing device for a paper gift box that simultaneously closes inward on all four sides according to claim 1, characterized in that: Both sides of the support plate (4) are fixedly connected to limit plates (32). The top of the movable seat (3) is fixedly connected to four limit rods (44). The four limit rods (44) pass through the four limit plates (32) respectively and are slidably connected to the four limit plates (32). A third spring (45) is sleeved on the outside of the limit rods (44). The two ends of the third spring (45) are fixedly connected to the limit plates (32) and the movable seat (3) respectively. A threaded rod (46) is rotatably connected inside the sliding base (1). The threaded rod (46) passes through the movable seat (3) and is threadedly connected to the movable seat (3). A motor (47) is fixedly connected to one end of the sliding base (1). The output end of the motor (47) is fixedly connected to the threaded rod (46).

10. The sealing device for a paper gift box that simultaneously closes inward on all four sides according to claim 1, characterized in that: One of the side plates (2) is fixedly connected to an L-shaped plate (48) on one side, and a second hydraulic cylinder (49) is fixedly connected to one side of the L-shaped plate (48). A moving plate (50) is fixedly connected to the output end of the second hydraulic cylinder (49). The output end of the moving plate (50) is inside the side plate (2). Another side plate (2) has a discharge port (51) inside, and the discharge port (51) corresponds to the moving plate (50).

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