A multi-layer storage mechanism for metal plates

Abstract

The application provides a kind of for metal sheet multilayer storage mechanism, it is related to storage device technical field, including storage box, the top of storage box is equipped with top cover, the bottom of storage box is fixed with support at four corners, and the bottom of top cover is equipped with multiple frame assemblies, the frame assembly can be incorporated into storage box inside, the frame assembly includes upper plate, the bottom of upper plate is equipped with lower plate, and the front end of upper plate and lower plate is fixed with front end cross bar, the rear end of upper plate and lower plate is fixed with rear end cross bar, the rear end of a group of frame assemblies rear end cross bar is fixed with telescopic rod at both ends, relative to prior art, through frame assembly, multiple metal sheets can be stacked and stored, metal sheet is received in wrapping film inside, after frame assembly is stacked and shrunk, the opening end of wrapping film is sealed, the gas in wrapping film is extracted by air cylinder, vacuum state is realized, so that multiple stacked sheets are rust protected, convenient for long-term storage or transportation storage.

Description

Technical Field

[0001] This invention relates to the field of storage device technology, specifically to a multi-layer storage mechanism for metal plates. Background Technology

[0002] Metal sheets generally refer to pure metals or alloys used in industrial applications. There are about 70 kinds of pure metals in nature, among which common ones include iron, copper, aluminum, tin, nickel, gold, silver, lead, zinc, etc. Alloys usually refer to materials that combine two or more metals or metals with non-metals and have metallic properties. There are many types of metal sheets, which can be broadly classified into pure metal sheets and alloy metal sheets. Both types are prone to rusting when stored, especially steel sheets, which will develop a layer of rust on their surface after a long period of storage. Once rust is present on the surface of steel sheets, the rate of rust production will increase, further corroding the steel sheets. Therefore, when storing steel sheets for a long time, it is necessary to remove moisture and oxygen from the container to prevent the steel sheets from easily rusting.

[0003] In order to prevent rusting, existing technologies for packaging, storing, or transporting ferrous metal sheets usually require storing them in sealed boxes and then wrapping them with a film or applying rust-preventive oil. However, this method is too cumbersome and requires handling each sheet individually, which is time-consuming and labor-intensive. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a multi-layer storage mechanism for metal sheets to solve the problems mentioned in the background. The present invention has a novel structure, in which multiple metal sheets can be stacked and stored through a frame assembly. The metal sheets are housed inside a wrapping film. After the frame assembly is stacked and contracted, the opening end of the wrapping film is sealed. The gas inside the wrapping film is extracted through an air cylinder to achieve a vacuum state, thereby providing rust protection for the multiple stacked sheets and facilitating long-term storage or transport storage.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-layer storage mechanism for metal sheets, comprising a storage box, a top cover, and four corner supports at the bottom of the storage box. Multiple frame assemblies are installed at the bottom of the top cover. These frame assemblies can be retracted into the storage box. Each frame assembly includes an upper plate and a lower plate at its bottom. Front crossbars are fixed to the front ends of both the upper and lower plates, and rear crossbars are fixed to the rear ends of both the upper and lower plates. Telescopic rods are fixed to both ends of the rear crossbars of each frame assembly. A wrapping assembly is provided inside the frame assembly, and the wrapping assembly includes a bag... The upper and lower plates have slots inside, through which the wrapping film slides. The front end of the wrapping film is connected to two front horizontal bars on its upper and lower sides. Air cylinders are fixed on both sides of the outer wall of the storage box, and piston rods are slidably inserted inside the air cylinders. The air outlets of the two sets of air cylinders and the piston rods move in opposite directions. The upper plate of the uppermost frame assembly inside the storage box is fixedly connected to the top cover. Upper side strips are fixed on both sides of the top cover. Lower side strips are fixed on both sides of the storage box at the bottom of the upper side strips. Two bolts are inserted into the surface of the upper side strips, and two screw holes are opened on the surface of the lower side strips. The bolts can be threaded into the screw holes.

[0006] Furthermore, the frame assembly also includes a slide groove, with slide grooves provided at both ends of the front horizontal bar, and a slide plate slidably connected inside the slide groove. A spring is fixed between the slide plate and the inner wall of the slide groove, and a limit block is fixed at the bottom of the slide plate. The four corners of the wrapping film slide along the inside of the limit block.

[0007] Furthermore, a bidirectional telescopic plate is fixed on the bottom surface of the front horizontal bar of the upper plate, and the two extended ends of the bidirectional telescopic plate are fixedly connected to the limiting block. The bidirectional telescopic plate is located at the rear end of the slide groove, and the top of the front end of the wrapping film is in pressure contact with the bidirectional telescopic plate.

[0008] Furthermore, the lower and upper plates of adjacent frame components are fixedly connected, and storage plates are provided on both sides of the front and rear crossbars of multiple sets of frame components. The upper and lower ends of the storage plates are slidably inserted with protruding plates, and the protruding plates and storage plates are fixedly connected to the upper and lower plates at different positions.

[0009] Furthermore, connecting rings are symmetrically fixed on both sides of the wrapping film, and the connecting rings of adjacent wrapping films are vertically arranged. A slide rod is slidably inserted inside the connecting ring, and a return spring is sleeved on the top and bottom of the slide rod. The other end of the return spring is fixed to the connecting ring, and multiple sets of connecting rings and slide rods on the sides of the wrapping film are staggered.

[0010] Furthermore, slide rails are fixed on the inner walls at both ends of the storage box at positions corresponding to the storage plates, and the storage plates slide along the inside of the slide rails.

[0011] Furthermore, the packaging assembly also includes air holes, air holes are provided on both sides of the middle of the packaging film, hollow inner plates are provided on the inner walls of both sides of the storage box, and elastic connection ports are fixed at equal intervals on the surface of the inner plates, and the air holes can be slidably inserted into the elastic connection ports.

[0012] Furthermore, an outer plate is provided on the outer side of the storage box at the position corresponding to the inner plate, and the outer plate is fixedly connected to the inner plate by a connecting rod. The connecting rod part of the outer plate and the inner plate slides out along the storage box. A bidirectional screw is rotatably installed at the bottom of the storage box through a bearing seat, and the bottom of the outer plate is threaded onto the surface of the bidirectional screw.

[0013] Furthermore, a corrugated pipe is fixed to the inner plate at the position corresponding to the air cylinder inlet, and the other end of the corrugated pipe extends out of the storage box and connects to the air cylinder inlet in the corresponding direction.

[0014] Furthermore, a connecting plate is fixed to the tail end of the piston rod, and a soft strap is fixedly connected to the top of the connecting plate. The soft strap wraps around the outside of the storage box, and a limiting frame is provided at the corner of the storage box, and the soft strap slides along the limiting frame.

[0015] The beneficial effects of this invention are:

[0016] 1. This invention uses a connecting plate to move a piston rod, which creates negative pressure inside the air cylinder. This negative pressure draws air out of the wrapping film through the corrugated pipe, hollow inner plate, air holes, and elastic connecting ports, creating a vacuum. After the top cover is placed on top of the storage box, the soft strip is squeezed and fixed by the bolts and screw holes of the upper side strip and lower plate. Since the soft strip cannot move, the piston rod cannot push the gas out of the air cylinder, thus maintaining a continuous vacuum inside the wrapping film.

[0017] 2. The frame components of the present invention are connected to each other by a telescopic structure, and the storage plate and the extension plate are provided with springs inside, which can elastically contract and expand, maintaining the connectivity of multiple stacked frame components while separating the upper and lower plates of each frame component for the removal of metal sheets.

[0018] 3. In the stacked state of the overall frame components, the protruding plate is stored in the storage plate, which slides along the slide rail to limit the frame components. The outer side of the wrapping film of each frame component is connected by a connecting ring and a sliding rod. The adjacent sliding rods are staggered to prevent movement interference in the stacked storage state, maintain the connection of the wrapping film, and can also be unfolded and folded synchronously. In addition, the outward movement distance of each wrapping film in the folded state is the same to connect with the elastic connection port. When the board is removed, the upper and lower plates of each frame component can be separated from top to bottom by pulling the top cover. Because the connection length between the storage plate and the protruding plate is limited, the lower frame components will also separate the upper and lower plates synchronously when the top plate is continuously pulled upward.

[0019] 4. When the upper and lower plates separate, the open end will be covered with a strip. At this time, the limiting block drives the sliding plate to retract inward along the slide groove, retracting the excess length on both sides of the wrapping film to facilitate the removal of the metal sheet. When the upper and lower plates close, the spring force in the slide groove moves the sliding plate outward, and the bidirectional telescopic rod also moves synchronously, pushing the excess length of the wrapping film outward to maintain contact between the upper and lower parts and the metal sheet. At the same time, rust-preventive oil can be pre-applied to the inner wall of the wrapping film to enhance the rust-preventive protection effect. When the upper and lower plates are close together, they will work together with the bidirectional telescopic plate to squeeze and seal the open end of the wrapping film, thus sealing the opening.

[0020] 5. Compared with the prior art, the present invention can stack and store multiple metal plates through the frame assembly. The metal plates are stored inside the wrapping film. After the frame assembly is stacked and shrunken, the opening end of the wrapping film is sealed. The gas inside the wrapping film is extracted by the air cylinder to achieve a vacuum state, thereby protecting the stacked plates from rust and facilitating long-term storage or transportation storage. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a multi-layer storage mechanism for metal sheets according to the present invention;

[0022] Figure 2 This is a schematic diagram of the bottom structure of a storage box for a multi-layer storage mechanism for metal sheets according to the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of a storage box for a multi-layer storage mechanism for metal sheets according to the present invention.

[0024] Figure 4 This is a schematic diagram of multiple connections of a frame assembly for a multi-layer storage mechanism for metal sheets according to the present invention;

[0025] Figure 5 This is a schematic diagram showing the connection between a frame assembly and a wrapping film for a multi-layer storage mechanism for metal sheets according to the present invention.

[0026] Figure 6 This is a schematic diagram of a frame component structure for a multi-layer storage mechanism for metal sheets according to the present invention.

[0027] Figure 7 This is a schematic diagram of the outer structure of a wrapping component for a multi-layer storage mechanism for metal sheets according to the present invention.

[0028] In the diagram: 1. Storage box; 11. Top cover; 12. Support leg; 13. Lower side strip; 14. Upper side strip; 15. Bolt; 16. Screw hole; 17. Slide rail; 2. Frame assembly; 21. Top plate; 22. Rear end crossbar; 23. Front end crossbar; 24. Connecting ring; 25. Slide rod; 26. Return spring; 27. Storage plate; 28. Extending plate; 29. ​​Slide groove; 210. Slide plate; 211. Limiting block; 212. Two-way telescopic plate; 213. Lower plate; 214. Through groove; 215. Telescopic rod; 3. Wrapping assembly; 31. Two-way screw; 32. Outer plate; 33. Air pump; 34. Soft strap; 35. Inner plate; 36. Elastic connection port; 37. Corrugated pipe; 38. Wrapping film; 39. Air hole; 310. Piston rod; 311. Connecting plate; 312. Limiting frame. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] Please see Figures 1 to 7This invention provides a technical solution: a multi-layer storage mechanism for metal sheets, including a storage box 1. The storage box 1 has a top cover 11, and four support legs 12 are fixed at the bottom corners of the storage box 1. Multiple frame assemblies 2 are installed at the bottom of the top cover 11. The frame assemblies 2 can be retracted into the storage box 1. Each frame assembly 2 includes an upper plate 21, and a lower plate 213 is provided at the bottom of the upper plate 21. A front crossbar 23 is fixed to the front end of both the upper plate 21 and the lower plate 213. Both the upper plate 21 and the lower plate 213 have rear crossbars 22 fixed to their rear ends. Telescopic rods 215 are fixed to both ends of the rear crossbars 22 of a set of frame components 2. A wrapping component 3 is provided inside the frame component 2. The wrapping component 3 includes a wrapping film 38. Through slots 214 are formed inside the upper plate 21 and the lower plate 213. The wrapping film 38 slides through the through slots 214 of the upper plate 21 and the lower plate 213, and the upper and lower sides of the front end of the wrapping film 38 are connected to two front crossbars 23. The outer wall of the storage box 1... Air cylinders 33 are fixed on both sides, and piston rods 310 are slidably inserted inside the air cylinders 33. The air outlets of the two sets of air cylinders 33 and piston rods 310 move in opposite directions. The upper plate 21 of the uppermost frame assembly 2 inside the storage box 1 is fixedly connected to the top cover 11. Upper side strips 14 are fixed on both sides of the top cover 11. Lower side strips 13 are fixed on both sides of the storage box 1 at the bottom of the upper side strips 14. Two bolts 15 are inserted into the surface of the upper side strips 14, and two bolts 15 are formed on the surface of the lower side strips 13. The screw hole 16 and the bolt 15 can be threaded into the screw hole 16. When using the device, open the top cover 11, pull out the stacked frame assembly 2 and unfold it. Put the metal plate into the opening end of the unfolded wrapping film 38 of the frame assembly 2, and then stack the frame assembly 2 to wrap the metal plate. Compress the vertical storage of the frame assembly 2 for convenient and unified storage in the storage box 1. The air in the wrapping film 38 is extracted by the wrapping assembly 3 to achieve rust prevention protection in a vacuum state, thereby improving the convenience of protecting the metal plate.

[0031] In this embodiment, the frame assembly 2 further includes a slide groove 29. Slide grooves 29 are provided at both ends of the front horizontal bar 23, and a sliding plate 210 is slidably connected inside the slide groove 29. A spring is fixed between the sliding plate 210 and the inner wall of the slide groove 29. A limit block 211 is fixed to the bottom of the sliding plate 210. The four corners of the wrapping film 38 slide along the inside of the limit block 211. A bidirectional telescopic plate 212 is fixed to the bottom surface of the front horizontal bar 23 of the upper plate 21, and the extended ends of the bidirectional telescopic plate 212 are fixedly connected to the limit block 211. The bidirectional telescopic plate 212 is located at the rear end of the slide groove 29, and the top front end of the wrapping film 38 is in contact with the bidirectional telescopic plate 212. The upper plate 21 and the lower plate... When 213 separates, the open end will be pulled along the edge. At this time, the limiting block 211 drives the sliding plate 210 to retract inward along the slide groove 29, retracting the excess length on both sides of the wrapping film 38 to facilitate the removal of the metal sheet. When the upper plate 21 and the lower plate 213 are closed, the spring force in the slide groove 29 moves the sliding plate 210 outward. The bidirectional telescopic rod 215 will also move synchronously, pushing the excess length of the wrapping film 38 outward to maintain contact with the metal sheet. At the same time, rust-preventive oil can be pre-applied to the inner wall of the wrapping film 38 to enhance the rust-preventive protection effect. When the upper plate 21 and the lower plate 213 are close together, they will cooperate with the bidirectional telescopic plate 212 to squeeze and seal the open end of the wrapping film 38, thus sealing the opening.

[0032] In this embodiment, the lower plate 213 and upper plate 21 of adjacent frame components 2 are fixedly connected. Storage plates 27 are provided on both sides of the front crossbar 23 and rear crossbar 22 of multiple sets of frame components 2. Extension plates 28 are slidably inserted into the upper and lower ends of the storage plates 27. The extension plates 28 and storage plates 27 are fixedly connected to the upper plate 21 and lower plate 213 at different positions, respectively. Connecting rings 24 are symmetrically fixed on both sides of the wrapping film 38. The connecting rings 24 of adjacent wrapping films 38 are vertically arranged, and a sliding rod 25 is slidably inserted into the inside of the connecting ring 24. The top and bottom of the slide bar 25 are fitted with return springs 26, and the other end of the return spring 26 is fixed to the connecting ring 24. Multiple sets of connecting rings 24 and slide bars 25 on the sides of the wrapping film 38 are staggered. Slide rails 17 are fixed on the inner walls of both ends of the storage box 1 at positions corresponding to the storage plates 27, and the storage plates 27 slide along the inside of the slide rails 17. The front and rear ends of the upper plates 21 and lower plates 213 of multiple sets of frame assemblies 2 are connected through the storage plates 27 and the protruding plates 28. This can be simply understood as the frame assemblies 2 being connected to each other through a telescopic structure. The storage plate 27 and the extension plate 28 are equipped with springs inside, allowing for elastic contraction and expansion. This maintains the connectivity of the multiple stacked frame components 2 while separating the upper plate 21 and lower plate 213 of each frame component 2 for easy removal of metal sheets. When the frame components 2 are stacked, the extension plate 28 is stored in the storage plate 27, which slides along the slide rail 17 to limit the movement of the frame components 2. The outer side of the wrapping film 38 of each frame component 2 is connected to a sliding rod 25 via a connecting ring 24. Adjacent sliding rods 25 are staggered to allow for... In the stacked storage state, there will be no movement interference, maintaining the connectivity of the wrapping film 38. It can also be unfolded and folded synchronously, and each group of wrapping films 38 moves outward the same distance in the folded state so as to connect with the elastic connection port 36. When the board is taken out, the upper plate 21 and lower plate 213 of each group of frame components 2 can be separated from top to bottom by pulling the top cover 11. Because the connection length between the storage plate 27 and the extension plate 28 is limited, when the top plate is continuously pulled upward, the lower frame component 2 will also separate the upper plate 21 and the lower plate 213 synchronously.

[0033] In this embodiment, the packaging assembly 3 further includes air holes 39. Air holes 39 are provided on both sides of the middle of the packaging film 38. Hollow inner plates 35 are provided on the inner walls of both sides of the storage box 1, and elastic connection ports 36 are fixed at equal intervals on the surface of the inner plates 35. The air holes 39 can be slidably inserted into the elastic connection ports 36. An outer plate 32 is provided on the outer side of the storage box 1 corresponding to the position of the inner plate 35, and the outer plate 32 is fixedly connected to the inner plate 35 by a connecting rod. The connecting rod portion of the outer plate 32 and the inner plate 35 slides out along the storage box 1. A bidirectional screw 31 is rotatably mounted on the bottom of the storage box 1 via a bearing seat. The bottom of the outer plate 32 is threaded onto the surface of the bidirectional screw 31. A bellows 37 is fixed to the inner plate 35 at the position corresponding to the air inlet of the air cylinder 33, and the other end of the bellows 37 extends out of the storage box 1 and connects to the air inlet of the air cylinder 33 in the corresponding direction. A connecting plate 311 is fixed to the tail end of the piston rod 310, and a soft strap 34 is fixedly connected to the top of the connecting plate 311. The soft strap 34 wraps around the outside of the storage box 1. A limiting frame 312 is provided at the corner of the storage box 1, and the soft strap 34 slides along the limiting frame 312. After the frame assembly 2 is stacked and stored inside the storage box 1, the bidirectional screw 31 is rotated, and the two... The outer plate 32 and the bidirectional screw 31 work together to push the inner plate 35. Due to the compression of the frame assembly 2, the excess part of the wrapping film 38 expands to both sides. At this time, the vent 39 is close to the elastic connection port 36. As the inner plate 35 moves, the vent 39 is inserted into the elastic connection port 36, and the elasticity of the elastic connection port 36 maintains the sealing effect at the connection between the two. Then, the soft belt 34 on the outside of the storage box 1 is moved manually. The soft belt 34 is a ring shape and moves around the limiting frame 312 on the outside of the storage box 1. During the movement, the piston rod 310 is driven to move through the connecting plate 311. A negative pressure is generated inside the air cylinder 33, thereby drawing out the air from the wrapping film 38 through the corrugated pipe 37, the hollow inner plate 35, the air hole 39, and the elastic connection port 36, making it a vacuum state. After the top cover 11 covers the top of the storage box 1, the soft belt 34 is squeezed and fixed by the bolts 15 and screw holes 16 of the upper side strip 14 and the lower plate. Since the soft belt 34 cannot move, the piston rod 310 cannot push out the gas in the air cylinder 33, and the vacuum state inside the wrapping film 38 can be maintained continuously. When it is necessary to remove the metal plate, the inner plate 35 is moved outward, and the air hole 39 is separated from the connection port.

[0034] When using the device, open the top cover 11. When the upper plate 21 and lower plate 213 separate, the opening end will be pulled. At this time, the limiting block 211 drives the sliding plate 210 to retract inward along the slide groove 29, retracting the excess length on both sides of the wrapping film 38 to facilitate the removal of the metal sheet. When the upper plate 21 and lower plate 213 are closed, the spring force in the slide groove 29 moves the sliding plate 210 outward. The bidirectional telescopic rod 215 will also move synchronously, pushing the excess length of the wrapping film 38 outward to maintain contact with the metal sheet. At the same time, rust-preventive oil can be pre-applied to the inner wall of the wrapping film 38 to enhance the rust-preventive protection effect. When the upper plate 213 approaches the lower plate 212, it will work with the bidirectional telescopic plate 212 to squeeze and seal the opening end of the wrapping film 38, thus sealing the opening. In the stacked state of the overall frame assembly 2, the protruding plate 28 is stored in the storage plate 27. The storage plate 27 slides along the slide rail 17 to limit the frame assembly 2. The outer side of the wrapping film 38 of each frame assembly 2 is connected to the slide rod 25 through the connecting ring 24. The adjacent slide rods 25 are staggered to prevent movement interference in the stacked storage state, maintain the connection of the wrapping film 38, and can also be unfolded and folded synchronously, while keeping each group of wrapping films 38 moving outward in the folded state. The moving distance is the same so as to connect with the elastic connection port 36. When taking out the board, the upper plate 21 and lower plate 213 of each frame assembly 2 can be separated from top to bottom by pulling the top cover 11. Because the connection length of the storage plate 27 and the extension plate 28 is limited, the lower frame assembly 2 will also separate the upper plate 21 and the lower plate 213 simultaneously when the top plate is continuously pulled upward. The soft strap 34 on the outside of the storage box 1 can be moved manually. The soft strap 34 is a ring shape and moves around the limiting frame 312 on the outside of the storage box 1. During the movement, the piston rod 310 is driven to move through the connecting plate 311. The piston rod 310 causes the air cylinder 33 to generate Negative pressure is applied to extract air from the wrapping film 38 through the corrugated pipe 37, the hollow inner plate 35, the air hole 39, and the elastic connection port 36, creating a vacuum. After the top cover 11 covers the top of the storage box 1, the soft strip 34 is squeezed and fixed by the bolts 15 and screw holes 16 of the upper side strip 14 and the lower plate. Since the soft strip 34 cannot move, the piston rod 310 cannot push the gas out of the air cylinder 33, thus maintaining the vacuum state inside the wrapping film 38. When it is necessary to remove the metal plate, the inner plate 35 is moved outward, and the air hole 39 is separated from the connection port, thereby improving the convenience of protecting the metal plate.

[0035] The foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-layer storage mechanism for metal sheets, comprising a storage box (1), characterized in that: The storage box (1) is provided with a top cover (11) and four corner supports (12) at the bottom of the storage box (1). Multiple sets of frame assemblies (2) are installed at the bottom of the top cover (11). The frame assemblies (2) can be stored inside the storage box (1). The frame assembly (2) includes an upper plate (21) and a lower plate (213) at the bottom of the upper plate (21). Front crossbars (23) are fixed at the front ends of the upper plate (21) and the lower plate (213). Rear crossbars (22) are fixed at the rear ends of the upper plate (21) and the lower plate (213). Telescopic rods (215) are fixed at both ends of the rear crossbars (22) of a set of frame assemblies (2). A wrapping assembly (3) is provided inside the frame assembly (2). The wrapping assembly (3) includes a wrapping film (38). A through groove (214) is opened inside the upper plate (21) and the lower plate (213). The wrapping film (38) 38) The through slot (214) of the upper plate (21) and the lower plate (213) is slidably passed through, and the front end of the wrapping film (38) is connected to the two front horizontal bars (23) on the upper and lower sides. Air cylinders (33) are fixed on both sides of the outer wall of the storage box (1), and piston rods (310) are slidably inserted inside the air cylinders (33). The air outlets of the two sets of air cylinders (33) and piston rods (310) move in opposite directions. The upper plate (21) of the uppermost frame assembly (2) inside the storage box (1) is fixedly connected to the top cover (11). Upper side strips (14) are fixed on both sides of the top cover (11). Lower side strips (13) are fixed on both sides of the storage box (1) at the bottom of the upper side strips (14). Two bolts (15) are inserted on the surface of the upper side strips (14). Two screw holes (16) are opened on the surface of the lower side strips (13), and the bolts (15) can be threaded into the screw holes (16). The frame assembly (2) also includes a slide groove (29). The two ends of the front crossbar (23) are provided with slide grooves (29), and a slide plate (210) is slidably connected inside the slide groove (29). A spring is fixed between the slide plate (210) and the inner wall of the slide groove (29). A limit block (211) is fixed at the bottom of the slide plate (210). The four corners of the wrapping film (38) slide along the inside of the limit block (211). A bidirectional telescopic plate (212) is fixed on the bottom surface of the front crossbar (23) of the upper plate (21), and the two extended ends of the bidirectional telescopic plate (212) are fixedly connected to the limit block (211). The bidirectional telescopic plate (212) is located at the rear end of the slide groove (29), and the wrapping film (38) is also fixed thereto. The front top is pressed against the bidirectional telescopic plate (212). When the upper plate (21) and the lower plate (213) are separated, the limiting block (211) drives the slide plate (210) to retract inward along the slide groove (29) and retract the excess length on both sides of the wrapping film (38). When the upper plate (21) and the lower plate (213) are closed, the spring force of the spring in the slide groove (29) moves the slide plate (210) outward and pushes the excess length of the wrapping film (38) outward, keeping the upper and lower parts in contact with the metal plate. When the upper plate (21) and the lower plate (213) are close together, they will cooperate with the bidirectional telescopic plate (212) to press and seal the opening end of the wrapping film (38), thus sealing the opening. Connecting rings (24) are symmetrically fixed on both sides of the wrapping film (38). The connecting rings (24) of adjacent wrapping films (38) are vertically arranged, and a sliding rod (25) is slidably inserted inside the connecting ring (24). A return spring (26) is sleeved on the top and bottom of the sliding rod (25). The other end of the return spring (26) is fixed to the connecting ring (24). The connecting rings (24) and sliding rods (25) on the sides of multiple sets of wrapping films (38) are staggered. The lower plate (213) and upper plate (21) of adjacent frame components (2) are fixedly connected. Storage plates (27) are provided on both sides of the front crossbar (23) and rear crossbar (22) of multiple sets of frame components (2). The upper and lower ends are slidably connected with protruding plates (28). The protruding plates (28) and the storage plates (27) are fixedly connected to the upper plates (21) and lower plates (213) at different positions respectively. The adjacent sliding rods (25) are staggered so that there will be no movement interference in the stacked storage state. They can also be unfolded and folded synchronously. When the plate is taken out, the upper plate (21) and lower plate (213) of each frame assembly (2) can be separated from top to bottom by pulling the top cover (11). Because the connection length of the storage plate (27) and the protruding plates (28) is limited, when the top plate is continuously pulled upward, the lower frame assembly (2) will also synchronously separate the upper plate (21) and the lower plate (213). The packaging assembly (3) also includes air holes (39). Air holes (39) are provided on both sides of the middle of the packaging film (38). Hollow inner plates (35) are provided on the inner walls of both sides of the storage box (1), and elastic connection ports (36) are fixed at equal intervals on the surface of the inner plates (35). The air holes (39) can be slidably inserted into the elastic connection ports (36). An outer plate (32) is provided on the outer side of the storage box (1) at the position corresponding to the inner plate (35), and the outer plate (32) and the inner plate (35) are fixedly connected by a connecting rod. The connecting rod part of the outer plate (32) and the inner plate (35) slides out along the storage box (1). A double-ended screw (31) is rotatably mounted on the bottom of the box (1) via a bearing seat, and the bottom thread of the outer plate (32) is threaded onto the surface of the double-ended screw (31). A bellows (37) is fixed on the inner plate (35) at the position corresponding to the air inlet of the air cylinder (33), and the other end of the bellows (37) passes through the storage box (1) and connects to the air inlet of the air cylinder (33) in the corresponding direction. A connecting plate (311) is fixed to the tail end of the piston rod (310), and a soft strap (34) is fixedly connected to the top of the connecting plate (311). The soft strap (34) wraps around the outside of the storage box (1), and a limiting frame is provided at the corner of the storage box (1). (312), and the soft band (34) slides along the limiting frame (312), rotate the bidirectional screw (31), the two outer plates (32) cooperate with the bidirectional screw (31) to push the inner plate (35) to push, because the compression of the frame assembly (2) causes the excess part of the wrapping film (38) to expand to both sides, as the inner plate (35) moves, the air hole (39) is inserted into the elastic connection port (36), and the elasticity of the elastic connection port (36) is used to maintain the sealing effect at the connection between the two. Then, the soft band (34) on the outside of the storage box (1) is moved manually, and during the movement, the connection is used to push the inner plate (35) ...6) to push the inner plate (35) to push the inner plate (35) to push the inner plate (36) to push the inner plate (35) to push the inner plate (36) to push the inner plate (35) to push the inner plate (36) to push the inner plate (35) to push the inner plate (36) to push the inner plate (35) to push the inner plate (36) to push the inner plate (35) to push the inner plate (36) to push the inner plate (35) to push the inner plate (36 The plate (311) drives the piston rod (310) to move. The piston rod (310) creates a negative pressure inside the air cylinder (33), thereby drawing out the air from the wrapping film (38) through the corrugated pipe (37), the hollow inner plate (35), the air hole (39), and the elastic connection port (36), making it a vacuum state. If the soft belt (34) cannot move, the piston rod (310) cannot push out the gas in the air cylinder (33), and the vacuum state inside the wrapping film (38) can be maintained continuously. When it is necessary to remove the metal plate, the inner plate (35) is moved outward, and the air hole (39) is separated from the connection port.

2. The multi-layer storage mechanism for metal sheets according to claim 1, characterized in that: The storage box (1) has slide rails (17) fixed on the inner walls at both ends corresponding to the positions of the storage plate (27), and the storage plate (27) slides along the inside of the slide rails (17).

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