Full-automatic material arranging, forming and boxing equipment

Abstract

The full-automatic material arranging, forming and boxing equipment comprises a material arranging and conveying mechanism, a clamping and transferring mechanism, a forming and pushing mechanism, a box conveying and opening mechanism and a box sealing mechanism, the forming and pushing mechanism comprises a left baffle, a right baffle, an upper baffle, a lower sealing plate and a pushing part, the left baffle is movably arranged on a left moving frame, and the right baffle is movably arranged on a right moving frame; the right baffle is movably arranged on the right moving frame, the upper baffle is movably arranged on the upper moving frame, the upper moving frame is connected with the first lifting driving assembly, the lower sealing plate is connected with the third moving driving assembly, the material pushing part is connected with the fourth moving driving assembly, and a forming space is defined by the left baffle, the right baffle, the upper baffle and the lower sealing plate. The clamping and transferring assembly can clamp and convey the materials into the forming space from the material arranging and conveying mechanism and rotate to achieve forming. According to the automatic boxing machine, automatic material arrangement can be achieved, and the materials are formed into bundles in the forming and pushing mechanism and then pushed into the packaging boxes to complete boxing operation.

Description

Technical Field

[0001] The present invention relates to packaging equipment, in particular to a fully automatic material sorting, forming and boxing equipment. Background Art

[0002] Cartoning equipment is a specialized device used to load materials into packaging boxes. Most cartoning equipment handles materials in fixed shapes, such as plates and bottles. To complete the process, the materials are simply placed on a conveyor belt and sent to a box-pushing station, where they are pushed into the box. Currently, a class of materials on the market consists of stacked soft materials, such as packaging bags and ziplock bags. To load these materials into smaller boxes, the bags must first be rolled into bundles before being loaded into the boxes. Traditional cartoning equipment cannot achieve this bundling process, and once the bags are rolled into bundles, they will unravel if simply placed on a conveyor belt for transport. Therefore, currently, the packaging of these materials is still done manually, with the stacked bags being rolled into bundles and then manually loaded into the boxes before being sealed. This places a high level of labor on the workers, and the overall packaging efficiency is low. Summary of the Invention

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a fully automatic material sorting, forming and boxing equipment for solving the above problems.

[0004] For this purpose, the present invention is achieved by adopting the following scheme: A fully automatic material sorting, forming and cartoning equipment is characterized in that it includes a material sorting and conveying mechanism, a clamping and transferring mechanism, a forming and pushing mechanism, a box conveying and opening mechanism and a box sealing mechanism, the forming and pushing mechanism includes a left baffle, a right baffle, an upper baffle, a lower sealing plate and a pushing piece, the left baffle is connected to the first moving drive component, the right baffle is connected to the second moving drive component, the upper baffle is connected to the first lifting drive component, the lower sealing plate is connected to the third moving drive component, the pushing piece is connected to the fourth moving drive component, the left baffle, the right baffle and the upper baffle enclose a forming space, and the clamping and transferring component can clamp the material from the material sorting and conveying mechanism to the forming space and rotate to achieve forming.

[0005] The left baffle is movably arranged on the left movable frame, and an elastic member is arranged between the left baffle and the left movable frame. The right baffle is movably arranged on the right movable frame, and an elastic member is arranged between the right baffle and the right movable frame. The upper baffle is movably arranged on the upper movable frame, and an elastic member is arranged between the upper baffle and the upper movable frame.

[0006] The clamping and transferring assembly includes a clamping rod, the clamping rod is connected to the clamping cylinder, the clamping cylinder is connected to the rotating disk, the rotating disk is connected to the rotating drive assembly, the rotating disk is arranged on a first movable seat, the first movable seat is connected to the front and rear movable drive assembly, the first movable seat is movably arranged on the second movable seat, the second movable seat is connected to the left and right drive assembly, the second movable seat is movably arranged on the lifting seat, and the lifting seat is connected to the second lifting drive assembly.

[0007] The pushing piece has a front pushing block, and the corners of the front pushing block are provided with extended raised portions.

[0008] The material sorting and conveying mechanism includes a first conveyor belt and a second conveyor belt that are arranged in coordination with each other. First partitions are arranged at intervals on the first conveyor belt, and second partitions are arranged at intervals on the second conveyor belt. The first partition and the second partition enclose a material placement space. The first conveyor belt and the second conveyor belt can move relative to each other, and the distance between the first partition and the second partition can be adjusted so that the first partition and the second partition cooperate to align the stacked materials. The first conveyor belt and the second conveyor belt can also move synchronously so that the first partition and the second partition cooperate to transport the stacked materials.

[0009] A baffle is provided on one side corresponding to the first conveyor belt and the second conveyor belt, and a material sensor is provided on the baffle.

[0010] A weighing platform is provided at the discharge end of the corresponding box sealing mechanism, a weighing sensor is provided at the bottom of the weighing platform, and a transfer component is provided above the corresponding weighing platform. The weighing sensor can feedback information to the control, and the controller can control the action of the transfer component.

[0011] There are two lower sealing plates on the left and right sides.

[0012] Comb-shaped platforms are provided at the discharge ends corresponding to the first conveyor belt and the second conveyor belt, and the comb-shaped platforms are composed of support members arranged at intervals.

[0013] The method for packing materials into boxes using a fully automatic material sorting, forming and boxing equipment is characterized by comprising the following steps: S1, the materials are fed into the material conveying mechanism for stacking and sorting, and then sent to the clamping station; S2, the clamping and transferring mechanism clamps the material at the clamping station and transfers it to the forming space surrounded by the left baffle, the right baffle and the upper baffle in the forming and pushing mechanism. Then the clamping and transferring mechanism drives the material to rotate, so that the material rolls up into a bundle in the forming space. Then the lower sealing plate moves to hold the bundled material, and the clamping and transferring mechanism releases the material and separates it. S3, the box body conveying and opening mechanism opens the box body and sends it to the pushing station, the pushing piece pushes the bundled material into the opened empty box body, and then sends the box body to the sealing mechanism to seal the box body.

[0014] The above technical solution is a fully automatic material sorting, forming and boxing equipment, which can stack and roll materials into bundles, and then carry out the boxing operation of the materials. The whole process is automated, which greatly reduces the labor intensity of workers and improves the efficiency of forming and pushing materials. It is particularly suitable for some stacked packaging bag products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention has the following accompanying drawings: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural diagram of the first and second conveyor belts of the present invention; Figure 3 It is a structural diagram of the material handling and conveying mechanism of the present invention; Figure 4 It is a structural diagram of the molding and pushing mechanism of the present invention; Figure 5 It is a structural diagram of the clamping and transferring mechanism of the present invention; Figure 6 It is a structural diagram of the upper conveyor belt of the box conveying and opening mechanism of the present invention; Figure 7 It is a structural diagram of the lower transfer assembly of the box conveying and opening mechanism of the present invention; Figure 8 It is a structural diagram of the box sealing mechanism of the present invention; Figure 9 It is a structural diagram of the weighing platform of the present invention; Figure 10 This is a schematic diagram of the process status of material boxing according to the present invention. DETAILED DESCRIPTION

[0016] As shown in the figure, the present invention discloses a fully automatic material sorting, forming and boxing equipment, including a material sorting and conveying mechanism 3, a clamping and transferring mechanism 4, a forming and pushing mechanism 5, a box conveying and opening mechanism 1 and a box sealing mechanism 2. The forming and pushing mechanism includes a left baffle 27, a right baffle 35, an upper baffle 32, a lower sealing plate 26, and a pushing piece. The left baffle 27 is connected to the first moving drive component, the right baffle 35 is connected to the second moving drive component, the upper baffle 32 is connected to the first lifting drive component, the lower sealing plate 26 is connected to the third moving drive component, and the pushing piece is connected to the fourth moving drive component. The left baffle 27, the right baffle 35 and the upper baffle 32 enclose a forming space. The clamping and transferring component can clamp the material from the material sorting and conveying mechanism to the forming space and rotate to achieve forming.

[0017] Furthermore, the left baffle 27 is movably mounted on the left movable frame 30, with an elastic member 31 disposed between the left baffle 27 and the left movable frame 30. The right baffle 35 is movably mounted on the right movable frame, with an elastic member disposed between the right baffle 35 and the right movable frame. The upper baffle 32 is movably mounted on the upper movable frame, with an elastic member disposed between the upper baffle and the upper movable frame. Specifically, the elastic member is a spring. With the above structure, if the amount of material is large or the volume is large, when the material is rotated and formed in the forming space, the material and the baffle are squeezed and collided, pushing the baffle to move a short distance, thereby preventing the material from getting stuck or damaged during the forming process due to insufficient space. After the forming process is completed, the spring will push the baffle to move to the appropriate position again.

[0018] Specifically, the first mobile drive assembly includes a first cylinder 29, which is connected to the left mobile frame 30; the second mobile drive assembly includes a second cylinder 34, which is connected to the right mobile frame; the third mobile drive assembly includes a third cylinder 28, which is connected to the lower sealing plate 26; and the first lifting drive assembly includes a fourth cylinder 33, whose piston rod is connected to the upper mobile frame. Using the above structure, by controlling the corresponding cylinders, the corresponding mobile frames and the lower sealing plate 26 can be driven to move. Of course, in addition to using cylinders, common linear drive structures such as linear motors, gear racks, synchronous belts, screws, and chains can also be used to drive the movement of each mobile frame and the lower sealing plate 26.

[0019] Furthermore, the clamping and transferring assembly includes a clamping rod 36, which is connected to a clamping cylinder 37, which is connected to a rotating disk 38, which is connected to a rotating drive assembly. The rotating drive assembly is a rotary drive motor 39, which is arranged on a first movable seat 40, which is connected to a forward and backward moving drive assembly. Specifically, the forward and backward moving drive assembly is a first linear motor 42, which is movably arranged on a second movable seat 43, which is connected to a left and right drive assembly. The left and right drive assembly is a second linear motor 41, which is movably arranged on a lifting seat 45, which is connected to a second lifting drive assembly. The second lifting drive assembly includes a second motor 44, the output end of the second motor 44 is connected to a first gear 46, which is meshed with a second gear 47, which is meshed with a vertically arranged rack 48. With the above structure, the clamping rod 36 can be driven to open and close, rotate, move forward and backward, move left and right, and lift by controlling the corresponding drive mechanism. The clamping rod 36 first moves to the material picking station to clamp the stacked materials (such as stacked packaging bags), and then the corresponding mobile drive assembly drives the clamping rod 36 to move, and transfers the clamped materials to the molding space surrounded by the baffle. At this time, the lower sealing plate 26 is in an open state, and some materials are hanging down and located outside the molding space. Then the rotating disk 38 drives the clamping rod 36 and the materials to rotate. During the rotation process, the materials will rotate along the clamping rod 36 and be wrapped in a bundle, so that all the materials can enter the molding space. Then the lower sealing plate 26 moves to seal the bottom of the molding space, and then the clamping rod 36 releases the material and withdraws from the molding space to separate from the material. The bottom of the material is supported by the lower sealing plate 26, and the other directions are limited by the baffles and will not be scattered or deformed. Finally, the forward push block 24 moves to push the molded material out of the molding space and into the packaging box.

[0020] Furthermore, the pusher includes a forward push block 24 with extended raised portions 25 at the corners. This structure allows the raised portions 25 to pre-enclose the corners of the material, preventing it from spreading during the pushing process and further improving the stability and reliability of the material pushing process. The forward push block 24 is connected to a push rod 23, which is in turn connected to a push drive mechanism. This push drive mechanism can be a common linear drive structure such as a cylinder, linear motor, or synchronous belt structure.

[0021] Furthermore, two lower sealing plates 26 are provided on the left and right sides. With the above structure, the bottom of the molding space can be opened or closed on both sides, which is convenient for feeding; at the same time, the structure of the two sealing plates 26 can also adjust the size of the bottom opening as needed to adapt to materials of different specifications.

[0022] Furthermore, the material handling and conveying mechanism includes a coordinated first conveyor belt 9 and a second conveyor belt 6. First baffles 8 are spaced apart on the first conveyor belt 9, and second baffles 7 are spaced apart on the second conveyor belt 6. The first and second baffles enclose a material placement space. The first and second conveyor belts can move relative to each other, and the spacing between the first and second baffles can be adjusted so that the first and second baffles cooperate to align the stacked materials. The first and second conveyor belts can also move synchronously so that the first and second baffles cooperate to transport the stacked materials. Furthermore, multiple sets of the first and second conveyor belts 9 and 6 are spaced apart. This allows for the balanced and stable delivery of large-scale materials. Materials (such as packaging bags) are first continuously fed into the material placement space surrounded by the first partition and the second partition. At this time, the distance between the first partition and the second partition is slightly larger than the specifications of the material, so that the material can fall into the material placement space more easily. After the required number of materials are stacked, the first conveyor belt and the second conveyor belt move relative to each other, so that the first partition and the second partition cooperate to align the materials. Then the first conveyor belt and the second conveyor belt move synchronously. At this time, the first partition and the second partition respectively resist the front and rear of the stacked materials, driving the materials backward to the comb-shaped platform to wait for the clamping component to clamp the stacked materials away.

[0023] Furthermore, baffles 12 are provided on one side of the first and second conveyor belts 9 and 6, and a material sensor 11 is mounted on the baffles 12. With this structure, the baffles 12 can limit the position of the packaging bag on both sides. If the material does not fall accurately into the material placement space enclosed by the first and second baffles, the material sensor 11 will sense it and feed back information to the controller, which will promptly control the machine to stop and issue an alarm.

[0024] Furthermore, the feed ends corresponding to the first and second conveyor belts are provided with obliquely arranged pressing pieces 10. The pressing pieces 10 are connected to the frame by fasteners, and their positions can be changed as needed. Moreover, the shape of the pressing pieces 10 can also be designed to be flat, cylindrical, etc. as needed. With the above structure, when the material is fed in, it will be guided by the pressing piece 10 and more easily enter the material placement space surrounded by the first and second partitions.

[0025] Furthermore, a weighing platform 66 is provided at the discharge end of the corresponding box sealing mechanism. A weighing sensor 65 is provided at the bottom of the weighing platform 66. A transfer assembly is provided above the corresponding weighing platform 66. The transfer assembly includes a third linear motor 67. The moving portion of the third linear motor is connected to a fifth cylinder 70. The piston rod of the fifth cylinder 70 is connected to a nozzle holder 69. The nozzle holder 69 is provided with a nozzle 68. By controlling the third linear motor 67 and the fifth cylinder 70, the nozzle 68 can be driven to move horizontally and rise and fall. The weighing sensor 65 can feedback information to the controller, and the controller can control the movement of the transfer assembly. With the above structure, when the package box with completed material boxing is sent to the weighing platform 66, the weighing sensor 65 will weigh its weight and feedback information to the controller. If the weight does not meet the requirements after the control analysis, the nozzle will suck the unqualified package box to the defective product collection area. Of course, it can also be configured so that after the controller analyzes the weight and meets the requirements, the nozzle will suck the finished carton to the finished product collection area.

[0026] A comb-like platform is installed at the discharge ends of the first and second conveyor belts. This platform is composed of spaced support members 15. The shapes of the support members 15 are not limited to bars, plates, or columns. With this structure, the comb-like platform can support the stacked materials being transferred there, while the subsequent clamping assembly can be inserted between the gaps in the support members 15 to clamp the materials for transfer.

[0027] Furthermore, the first and second conveyor belts 9 and 6 are mounted on a movable plate 16, which is connected to a horizontal adjustment assembly. Specifically, the horizontal adjustment assembly includes a first adjustment screw 22, which is threadedly connected to the movable plate 16. The movable plate 16 is provided with a slide 17 and a slide rail 18 that cooperates with the slide 17. By controlling the rotation of the first adjustment screw 22, the movable plate 16 is guided by the slide rail 18, thereby adjusting the position of the first and second conveyor belts to suit the specifications of the packaging bags. Furthermore, the first and second conveyor belts 9 and 6 are mounted on a lifting member, which is connected to the lifting and adjustment assembly. Specifically, the lifting member is a slide rail 18, which is movably mounted on a frame and equipped with a guide assembly. The lifting drive assembly includes a lifting screw 19 fixed at one end to the slide rail 18. The lifting screw 19 is screwed to a threaded hole in the middle of a drive sprocket 20. A chain 21 is wound around the drive sprocket 20, which passes around a driving sprocket. The driving sprocket is connected to an adjustment handle or a corresponding motor. By controlling the rotation of the driving sprocket and transmitting the power through the chain 21, the drive sprocket 20 can be driven to rotate, and the lifting screw 19 and the slide rail 18 can be driven up and down, thereby adjusting the overall height of the first and second conveyor belts. Of course, in addition to the above-mentioned structure, the horizontal adjustment assembly and the lifting adjustment assembly can also be driven by common linear drive structures such as linear motors, synchronous belt structures, and gear racks to drive them to operate.

[0028] Furthermore, the box conveying and opening mechanism 1 includes a box feeding conveyor belt 49, and the discharge end of the box feeding conveyor belt 49 is provided with a downward inclined slope section, and a lower baffle 52 and an upper limit plate 50 are provided corresponding to the slope section. The lower baffle 52 can locally position and support the paper box that has been sent to the slope section and has not been opened. The upper limit plate 50 is used to limit the top of the paper box to prevent it from moving up and down. A guide assembly is provided corresponding to the upper limit plate 50, and the upper limit plate 50 is screwed with the second adjusting screw 51. By controlling the rotation of the second adjusting screw 51, the position of the upper limit plate 50 can be adjusted to adapt to the specifications of the paper box. The corresponding slope section is provided with a box suction nozzle 53, which is arranged on a box suction rack. The box suction rack is connected to the piston rod of the sixth cylinder 54, and the cylinder body of the sixth cylinder 54 is connected to the rotating cylinder 55. A lower suction nozzle 56 is provided below the corresponding box suction nozzle 53, and the lower suction nozzle 56 is arranged on the lower suction nozzle rack 57. The lower suction nozzle rack 57 is connected to the piston rod of the seventh cylinder 58. During operation, the unopened box body is first placed on the box feeding conveyor 49 for transportation. Then the box suction nozzle 53 sucks the box body partially blocked by the lower baffle 52 and transfers it downward. During the descending process, the paper box will be squeezed by the opening and closing plate and opened. Then the lower suction nozzle 56 rises to suck the opened packaging box and convey it downward to the conveyor belt 59. Push blocks 60 are arranged on the conveyor belt 59. The opened box body will be sent between adjacent push blocks 60 and pushed to the pushing station by the push blocks 60.

[0029] The box sealing mechanism 2 includes a tongue folding plate assembly 63 and a gluing assembly 64 arranged along the conveying path of the conveyor belt 59, which are used to fold the box tongue inward and glue and seal the box. This is a common structure on the market and is not an innovation of this application. Its specific structure and action will not be described in detail.

[0030] The method of using fully automatic material sorting, forming and boxing equipment to box materials includes the following steps: S1, feeding the material 71 into the material sorting and conveying mechanism 3 for stacking and sorting, and then sending it to the clamping station; S2, the clamping and transferring mechanism 4 clamps the material at the clamping station and transfers it to the forming space surrounded by the left baffle 27, the right baffle 35 and the upper baffle 32 in the forming and pushing mechanism. Then, the clamping and transferring mechanism drives the material 71 to rotate, so that the material rolls up into a bundle 72 in the forming space. Then, the lower sealing plate 26 moves to hold the bundled material, and the clamping and transferring mechanism releases the material and separates it. S3, the box body conveying and opening mechanism 1 opens the box body 73 and sends it to the pushing station. The pushing piece pushes the bundled material into the opened empty box body, and then sends the box body 73 to the sealing mechanism to seal the box body.

[0031] The structure of the present invention can realize the stacking and winding of materials into bundles, and then the subsequent boxing of materials, realizing the whole process of automation, greatly reducing the labor intensity of workers and improving the efficiency of forming and pushing materials, and is particularly suitable for some stacked packaging bag products.

Claims

1. A fully automatic material sorting, forming and boxing equipment, characterized by: The invention comprises a material handling and conveying mechanism (3), a clamping and transferring mechanism (4), a molding and pushing mechanism (5), a box conveying and opening mechanism (1) and a box sealing mechanism (2), wherein the molding and pushing mechanism comprises a left baffle (27), a right baffle (35), an upper baffle (32), a lower sealing plate (26) and a material pushing member, wherein the left baffle (27) is connected to a first moving drive assembly, the right baffle (35) is connected to a second moving drive assembly, the upper baffle (32) is connected to a first lifting drive assembly, the lower sealing plate (26) is connected to a third moving drive assembly, and the material pushing member is connected to a fourth moving drive assembly, the left baffle (27), the right baffle (35) and the upper baffle (32) enclose a molding space, and the clamping and transferring assembly can clamp and convey the material from the material handling and conveying mechanism to the molding space and rotate to realize molding.

2. The fully automatic material sorting, forming and boxing equipment according to claim 1, characterized in that: The left baffle (27) is movably arranged on the left movable frame (30), and an elastic member (31) is arranged between the left baffle (27) and the left movable frame (30). The right baffle (35) is movably arranged on the right movable frame, and an elastic member is arranged between the right baffle (35) and the right movable frame. The upper baffle (32) is movably arranged on the upper movable frame, and an elastic member is arranged between the upper baffle and the upper movable frame.

3. The fully automatic material sorting, forming and boxing equipment according to claim 1, characterized in that: The clamping and transferring assembly includes a clamping rod (36), the clamping rod (36) is connected to the clamping cylinder (37), the clamping cylinder (37) is connected to the rotating disk (38), the rotating disk (38) is connected to the rotating drive assembly, the rotating disk (38) is arranged on a first movable seat (40), the first movable seat (40) is connected to the front and rear movable drive assembly, the first movable seat (40) is movably arranged on a second movable seat (43), the second movable seat (43) is connected to the left and right drive assembly, the second movable seat (43) is movably arranged on a lifting seat (45), and the lifting seat (45) is connected to the second lifting drive assembly.

4. The fully automatic material sorting, forming and boxing equipment according to claim 1, characterized in that: The pusher has a front push block (24), and a raised portion (25) is extended and arranged at a corner of the front push block (24).

5. The fully automatic material sorting, forming and boxing equipment according to claim 1, characterized in that: The material sorting and conveying mechanism comprises a first conveyor belt (9) and a second conveyor belt (6) which are arranged in a coordinated manner. A first partition (8) is arranged at intervals on the first conveyor belt (9), and a second partition (7) is arranged at intervals on the second conveyor belt (6). The first partition and the second partition enclose a material placement space. The first conveyor belt and the second conveyor belt can move relative to each other, and the spacing between the first partition and the second partition can be adjusted so that the first partition and the second partition cooperate to align the stacked materials. The first conveyor belt and the second conveyor belt can also move synchronously so that the first partition and the second partition cooperate to transport the stacked materials.

6. The fully automatic material sorting, forming and boxing equipment according to claim 5, characterized in that: A baffle (12) is provided on one side corresponding to the first conveyor belt and the second conveyor belt, and a material sensor (11) is provided on the baffle (12).

7. The fully automatic material sorting, forming and boxing equipment according to claim 1, characterized in that: A weighing platform (66) is provided at the discharge end of the corresponding box sealing mechanism, a weighing sensor (65) is provided at the bottom of the weighing platform (66), and a transfer component is provided above the corresponding weighing platform (66). The weighing sensor (65) can feed back information to the controller, and the controller can control the action of the transfer component.

8. The fully automatic material sorting, forming and boxing equipment according to claim 1, characterized in that: Two lower sealing plates (26) are provided on the left and right sides.

9. The fully automatic material sorting, forming and boxing equipment according to claim 5, characterized in that: Comb-shaped platforms are provided at the discharge ends of the corresponding first conveyor belt and the second conveyor belt, and the comb-shaped platforms are composed of support members (15) arranged at intervals.

10. A method for packing materials into boxes using the fully automatic material sorting, forming and boxing equipment according to claim 1, characterized in that The following steps are involved: S1, feeding the material (71) into the material sorting and conveying mechanism (3) for stacking and sorting, and then sending it to the clamping station; S2, the clamping and transferring mechanism (4) clamps the material at the clamping station and transfers it to the forming space surrounded by the left baffle (27), the right baffle (35) and the upper baffle (32) in the forming and pushing mechanism, and then the clamping and transferring mechanism drives the material (71) to rotate, so that the material rolls up into a bundle (72) in the forming space, and then the lower sealing plate (26) moves to hold the bundled material, and the clamping and transferring mechanism releases the material and separates it from the material; S3, the box body conveying and opening mechanism (1) opens the box body (73) and sends it to the pushing station, and the pushing piece pushes the bundled material into the opened empty box body, and then sends the box body (73) to the box sealing mechanism to seal the box body.

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