Stacking and conveying device for producing colored stone metal tiles

Abstract

This invention relates to the field of conveying facilities, specifically a stacking conveyor device for the production of colored stone metal tiles. The device includes a chain conveyor with a stacking tray placed at its upper end. A locking mechanism is installed between the stacking tray and the chain conveyor. Two guide rods are symmetrically fixed to the upper end of the stacking tray. Multiple partition plates are linearly arranged above the stacking tray, and a dispersing mechanism is installed between the partition plates and the chain conveyor. The bottom partition plate is fixed to the guide rod, while the remaining partition plates are slidably connected to the guide rod. The upper surfaces of the remaining partition plates (excluding the top partition plate) are linearly arranged with multiple arc-shaped grooves. This invention ensures the service life of the stacked arc-shaped tiles, facilitates stacking, and prevents collapse of the stacked tiles.

Description

Technical Field

[0001] This invention relates to the field of conveying facilities, specifically a stacking conveying device for the production of colored stone metal tiles. Background Technology

[0002] Colored stone metal roofing tiles are suitable for various applications including wooden roof trusses, steel frames, all-steel space frames, and concrete roofs. They can replace traditional roofing materials such as clay tiles, cement tiles, color steel plates, fiberglass asphalt shingles, and slate tiles. A wide variety of colored stone metal roofing tiles are available, including arched tiles, eight-wave tiles, beveled tiles, wood grain tiles, square tiles, small Roman tiles, and large Roman tiles, to meet different architectural styles and needs.

[0003] In the production process of curved tiles, specialized intelligent packaging equipment is often used for automatic conveying and packaging. The intelligent packaging equipment has a conveyor line and a packaging line. Workers stack the produced curved tiles on the conveyor device, and then the conveyor device transports them to an outdoor stacking area for centralized storage and waiting for packaging. Finally, the packaging line packages them together for subsequent transportation.

[0004] However, in actual use, since the arc-shaped tiles are pressed and stacked together for transportation, it is difficult for multiple arc-shaped tiles to ventilate. As a result, when they are transported to the outdoor stacking area for centralized storage, the multiple arc-shaped tiles are prone to dampness and cannot be kept dry. Dampness can easily cause the tiles to deform and crack, seriously affecting their lifespan. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a stacking and conveying device for the production of colored stone metal tiles.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a stacking and conveying device for the production of colored stone metal tiles, comprising a chain conveyor, a stacking tray placed at the upper end of the chain conveyor, a tray locking component provided between the stacking tray and the chain conveyor, two guide rods symmetrically fixedly installed at the upper end of the stacking tray, multiple partition plates arranged in a linear array above the stacking tray, a dispersing component provided between the partition plates and the chain conveyor, the partition plate at the bottom being fixed to the guide rod, the partition plates other than those at the bottom being slidably connected to the guide rod, the upper end surfaces of the partition plates other than those at the top being linearly arrayed with multiple arc-shaped grooves, the lower ends of the partition plates other than those at the bottom being symmetrically fixedly installed with two arc-shaped seats, and tile fixing components provided on the partition plates.

[0007] Preferably, the dispersing component includes a rail frame fixedly installed at the rear end of the frame of the chain conveyor. Multiple dispersing rails are evenly distributed and embedded at the front end of the rail frame. The length of the multiple dispersing rails decreases from bottom to top. Dispersing wheels are installed at the middle of the rear end of multiple partition plates except those located at the bottom. The multiple dispersing wheels correspond to the multiple dispersing rails respectively.

[0008] Preferably, the fixing element includes two top seats that extend symmetrically at the rear ends of multiple partition plates (excluding the top one), and two protruding ears that extend symmetrically at the rear ends of each of the multiple partition plates (excluding the bottom one). Each end of the two protruding ears is rotatably mounted with a clamping bracket, and an ear bracket is rotatably mounted between the ends of the two clamping brackets. Two top ears are symmetrically fixedly mounted on the ear bracket.

[0009] Preferably, multiple limiting blocks are slidably mounted on the outer surfaces of both guide rods, and the multiple limiting blocks are closely attached to multiple partition plates. A carrier is embedded between the opposite faces of two limiting blocks on the same horizontal line. Two column seats are symmetrically embedded on the upper end face of the carrier. Guide posts extend from the ends of the column seats. A sliding sleeve is slidably mounted on the outer surface of the guide post. The upper end of the sliding sleeve is fixed to the ear bracket. A positioning cap is coaxially embedded at the end of the guide post. A return spring is wound around the outside of the guide post. The two ends of the return spring are fixed to the sliding sleeve and the column seat, respectively.

[0010] Preferably, the upper end face of the partition plate located at the top has two symmetrically rotatably mounted handles, the outer surface of the handles is fixedly mounted with a connecting frame, the end of the connecting frame is fixedly mounted with a locking block, and the outer surface of the guide rod is provided with a locking groove, the locking groove corresponding to the locking block.

[0011] Preferably, the locking plate component includes two top plates elastically mounted at the front and rear ends of the stacking pallet. Locking pushers are rotatably mounted at both ends of the top plates. The locking pushers are inclined. Locking lugs are rotatably mounted at the ends of the locking pushers. The locking lugs are slidably connected to the stacking pallet. The locking lugs are T-shaped.

[0012] Preferably, multiple sets of positioning blocks are evenly distributed and fixedly installed on the chain plate of the chain conveyor, with four positioning blocks in each set. The four positioning blocks are arranged in a square array, and the stacking tray is attached to the inner side of one set of positioning blocks. Locking grooves are opened on the opposite sides of the four positioning blocks, and the locking lugs correspond to the locking grooves.

[0013] Preferably, the top plate extends symmetrically with two sliding columns relative to the end face of the stacking tray. The sliding columns slide through the stacking tray. A spring body is wound around the outside of the sliding column. The two ends of the spring body are fixed to the stacking tray and the top plate, respectively. A locking wheel is installed in the middle of the end face of the top plate opposite to the stacking tray. Two locking frames are symmetrically fixed on the upper end of the frame of the chain conveyor. The locking wheel corresponds to the end of the locking frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By using the partition plates, multiple arc tiles can be separated during stacking, ensuring good ventilation between the stacked arc tiles and keeping them dry to prevent deformation, cracking, and other problems, thus guaranteeing the service life of the stacked arc tiles.

[0015] 2. When the chain conveyor transports the pallet to the locking frame, the locking wheel rolls along the inclined edge of the locking frame to drive the top plate toward the pallet, which in turn drives the locking pusher to move and push the locking lug into the locking groove on the positioning block, thus fixing the pallet. Then the chain conveyor continues to transport the pallet. At this time, the bottommost dispersing wheel contacts the bottommost dispersing rail and rolls along its inclined edge to drive multiple partition plates (except the bottom ones) to move upward synchronously. After moving upward, the second-to-last dispersing wheel contacts the second-to-last dispersing rail and rolls along its inclined edge to drive multiple partition plates (except the two bottom partition plates) to move upward synchronously. This process continues, allowing the multiple partition plates to disperse on their own, so that workers can place the arc tiles between the multiple partition plates for stacking.

[0016] 3. When the dispersed partition plates move down and reset, the limiting block moves down synchronously with the partition plates. After the limiting block presses on the lower partition plate, the top ear just contacts the arc tile. Then, the upper partition plate continues to move down under gravity. At this time, the limiting block remains stationary due to the support of the lower partition plate, which in turn keeps the guide post stationary. The clamping frame moves under the action of the continuing downward partition plate to push the ear frame. At this time, the sliding sleeve slides on the guide post, allowing the ear frame to move horizontally, which in turn drives the top ear to move horizontally to press against the convex edge of the arc tile, making the arc tile adhere tightly to the top seat. At this time, the arc seat on the upper partition plate just presses on the arc tile to press the arc tile into the arc groove of the lower partition plate. This process is repeated to firmly fix each layer of arc tiles to ensure that the stacked arc tiles will not collapse. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the dispersion track of the present invention; Figure 3 For the present invention Figure 1 Enlarged view of A in the middle; Figure 4 For the present invention Figure 1 Enlarged view of B in the middle; Figure 5 For the present invention Figure 1 Enlarged view of C; Figure 6This is a stacked view of the arc-shaped tiles of the present invention; Figure 7 This is a fixed view of the arc-shaped tile of the present invention; Figure 8 This is a schematic diagram of the top ear of the present invention; Figure 9 This is a schematic diagram of the sliding sleeve of the present invention; Figure 10 This is a schematic diagram of the partition plate of the present invention; Figure 11 This is a schematic diagram of the arc-shaped tile of the present invention.

[0018] The components represented by each number in the attached diagram are listed below: 1. Chain conveyor; 2. Locking frame; 3. Positioning block; 4. Stacking tray; 5. Rail frame; 6. Dispersing rail; 7. Guide rod; 8. Dispersing wheel; 9. Divider plate; 10. Carrier frame; 11. Top plate; 12. Top lug; 13. Arc-shaped seat; 14. Limiting block; 15. Column base; 16. Guide column; 17. Positioning cap; 18. Sliding sleeve; 19. Return spring; 20. Extending lug; 21. Tightening frame; 22. Lug frame; 23. Top seat; 24. Sliding column; 25. Spring body; 26. Locking push frame; 27. Locking lug; 28. Locking groove; 29. ​​Arc-shaped groove; 30. Locking wheel; 31. Slot; 32. Turning handle; 33. Connecting frame; 34. Locking block; 35. Arc-shaped tile. Detailed Implementation

[0019] 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.

[0020] This invention provides a technical solution: such as Figure 1 - Figure 11The illustrated stacking and conveying device for producing colored stone metal tiles includes a chain conveyor 1. A stacking tray 4 is placed on the upper end of the chain conveyor 1. The stacking tray 4 serves to support the partition plates 9, guide rods 7, etc. The design of the stacking tray 4 prevents it from contacting the arc-shaped tiles 35 during hoisting, effectively avoiding breakage of the arc-shaped tiles 35 during the hoisting process. A locking device is installed between the stacking tray 4 and the chain conveyor 1. Two guide rods 7 are symmetrically fixedly installed on the upper end of the stacking tray 4. Multiple partition plates 9 are arranged in a linear array above the stacking tray 4, and the guide rods 7 guide the partition plates 9. For the function of the guide, a dispersing component is provided between the partition plate 9 and the chain conveyor 1. The partition plate 9 at the bottom is fixed to the guide rod 7. Except for the partition plate at the bottom, multiple partition plates 9 are slidably connected to the guide rod 7. Except for the partition plate at the top, multiple arc-shaped grooves 29 are linearly arrayed on the upper surface of multiple partition plates 9. Except for the partition plate at the bottom, two arc-shaped seats 13 are symmetrically fixedly installed at the lower end of multiple partition plates 9. The arc-shaped grooves 29 and arc-shaped seats 13 can adapt to the curvature of the arc tile 35 and press it, so that the arc tile 35 will not shift left or right. The partition plate 9 is provided with tile fixing components.

[0021] The dispersing component includes a rail frame 5 fixedly installed at the rear end of the frame of the chain conveyor 1. Multiple dispersing rails 6 are evenly distributed and embedded at the front end of the rail frame 5. The rail frame 5 serves to support and fix the dispersing rails 6. The length of the multiple dispersing rails 6 decreases from bottom to top, which allows the multiple partition plates 9 to be dispersed from bottom to top. Except for the bottom, the middle of the rear end of the multiple partition plates 9 is equipped with a dispersing wheel 8. The multiple dispersing wheels 8 correspond to the multiple dispersing rails 6 respectively. The dispersing wheels 8 can cooperate with the dispersing rails 6 to disperse the multiple partition plates 9.

[0022] The fixing component includes two top seats 23 extending symmetrically from the rear ends of multiple partition plates 9 (excluding the top). The top seats 23 can fit against the ends of the arc-shaped tile 35, preventing the arc-shaped tile 35 from moving backward. Each of the multiple partition plates 9 (excluding the bottom) has two protruding ears 20 extending symmetrically from its rear ends. Each end of the two protruding ears 20 is rotatably mounted with a clamping frame 21. The protruding ears 20 serve to connect the clamping frame 21. An ear bracket 22 is rotatably mounted between the ends of the two clamping frames 21. Two top ears 12 are symmetrically fixed on the ear bracket 22. The clamping frame 21 can push the ear bracket 22, allowing the top ears 12 on the ear bracket 22 to move horizontally and press against the protruding edge of the arc-shaped tile 35, thereby pressing the arc-shaped tile 35 tightly against the top seat 23 and preventing the arc-shaped tile 35 from shifting back and forth.

[0023] Multiple limiting blocks 14 are slidably mounted on the outer surfaces of both guide rods 7. These limiting blocks 14 are tightly fitted between multiple partition plates 9. The limiting blocks 14 support the upper partition plate 9, thereby supporting the weight of the upper arc-shaped tile 35 and preventing its weight from being transferred to the lower arc-shaped tile 35, thus avoiding breakage due to excessive weight. A carrier frame 10 is embedded between the opposite faces of two limiting blocks 14 on the same horizontal line. The limiting blocks 14 can slide on the guide rods 7 to guide the carrier frame 10. Two column bases 15 are symmetrically embedded on the upper end face of the carrier frame 10. The end of the seat 15 extends into a guide post 16, which supports the guide post 16. A sliding sleeve 18 is slidably mounted on the outer surface of the guide post 16. The upper end of the sliding sleeve 18 is fixed to the ear bracket 22. The guide post 16 and the sliding sleeve 18 provide horizontal guidance for the ear bracket 22. A positioning cap 17 is coaxially embedded at the end of the guide post 16. A return spring 19 is wound around the outside of the guide post 16. The positioning cap 17 positions the sliding sleeve 18 in its reset position. The two ends of the return spring 19 are fixed to the sliding sleeve 18 and the seat 15, respectively. The return spring 19 resets the moved sliding sleeve 18.

[0024] Two rotatable handles 32 are symmetrically and rotatably mounted on the upper end face of the top partition plate 9. A connecting frame 33 is fixedly mounted on the outer surface of the rotatable handle 32. The connecting frame 33 serves to connect and fix the parts. A locking block 34 is fixedly mounted at the end of the connecting frame 33. The rotatable handle 32 drives the locking block 34 to rotate. A slot 31 is opened on the outer surface of the guide rod 7. The slot 31 corresponds to the locking block 34. The slot 31 and the locking block 34 engage to restrict the multiple partition plates 9 that are gathered together to prevent them from shaking, thereby improving the fixation of the arc tile 35.

[0025] The locking plate assembly includes two top plates 11 that are elastically mounted at the front and rear ends of the pallet 4. Both ends of the top plates 11 are rotatably mounted with locking pushers 26. The top plates 11 drive the locking pushers 26 to move. The locking pushers 26 are inclined. The ends of the locking pushers 26 are rotatably mounted with locking lugs 27. The locking pushers 26 can push the locking lugs 27. The locking lugs 27 are slidably connected to the pallet 4. The locking lugs 27 are T-shaped to prevent them from separating from the pallet 4.

[0026] Multiple sets of positioning blocks 3 are evenly distributed and fixedly installed on the chain plate of the chain conveyor 1. Each set of positioning blocks 3 consists of four blocks, which are arranged in a square array. The positioning blocks 3 are used to position the pallet 4. The pallet 4 is attached to the inner side of one set of positioning blocks 3. The opposite surfaces of the four positioning blocks 3 are provided with locking grooves 28, and locking ears 27 correspond to the locking grooves 28. The locking ears 27 and locking grooves 28 can lock the pallet 4 onto the chain plate of the chain conveyor 1.

[0027] Two sliding columns 24 extend symmetrically from the end face of the top plate 11 relative to the stacking tray 4. The sliding columns 24 slide through the stacking tray 4 and guide the top plate 11. A spring body 25 is wound around the outside of the sliding column 24. The two ends of the spring body 25 are fixed to the stacking tray 4 and the top plate 11 respectively. The spring body 25 can reset the top plate 11 after it has moved, so that the locking lug 27 separates from the locking groove 28, thereby loosening the locked stacking tray 4. A locking wheel 30 is installed in the middle of the end face of the top plate 11 opposite to the stacking tray 4. Two locking frames 2 are symmetrically fixed on the upper end of the frame of the chain conveyor 1. The locking wheel 30 corresponds to the end of the locking frame 2. The locking wheel 30 can roll on the inclined side of the end of the locking frame 2 to drive the top plate 11 to move toward the stacking tray 4, thereby driving the locking push frame 26 to move, so as to push the locking lug 27 into the locking groove 28 on the positioning block 3, so that the stacking tray 4 is fixed.

[0028] When the dedicated intelligent packaging equipment conveyor line is in operation, the pallet 4 is placed on the chain conveyor 1. At this time, the positioning block 3 is attached to the corner of the pallet 4 to limit the pallet 4. Then the chain conveyor 1 works to transport the pallet 4. When the chain conveyor 1 transports the pallet 4 to the locking frame 2, the locking wheel 30 will roll on the inclined side of the end of the locking frame 2 to drive the top plate 11 to move towards the pallet 4, thereby driving the locking push frame 26 to move to push the locking lug 27 into the locking groove 28 on the positioning block 3, so that the pallet 4 is fixed. Then the chain conveyor 1 continues to transport the pallet 4. At this time, the lowest dispersing wheel 8 contacts the lowest dispersing rail 6 and moves along its inclined side. The rollers roll, driving multiple partition plates 9 (excluding the bottom ones) to move upwards synchronously. After moving upwards, the second-to-last dispersing roller 8 contacts the second-to-last dispersing rail 6 and rolls along its end slope, driving multiple partition plates 9 (excluding the two bottom partition plates 9) to move upwards synchronously. This process continues, allowing the multiple partition plates 9 to disperse on their own. Then, the chain conveyor 1 stops working. Next, workers can place the produced arc tiles 35 onto the multiple partition plates 9 in sequence. Then, the chain conveyor 1 works to transport the pallet 4. At this time, under the action of gravity, multiple dispersing rollers 8 will disengage from multiple dispersing rails 6 from top to bottom, thereby driving multiple partition plates 9 to move downwards in sequence, that is, the top partition plate 9 moves downwards. After moving closer to the second partition plate 9, the second partition plate 9 will move down synchronously with the top partition plate 9 to move closer to the third partition plate 9, and so on, bringing the dispersed partition plates 9 together. As the partition plates 9 move down, the limiting block 14 will move down synchronously with them. After the limiting block 14 presses down on the lower partition plate 9, the top ear 12 will just contact the arc tile 35. Then, the upper partition plate 9 continues to move down under gravity. At this time, the limiting block 14 remains stationary due to the support of the lower partition plate 9, thus keeping the guide post 16 stationary. The clamping frame 21 will move under the action of the continuing downward movement of the partition plates 9 to push the ear frame 22. At this time, the sliding... The sleeve 18 slides on the guide post 16, allowing the ear bracket 22 to move horizontally, which in turn drives the top ear 12 to move horizontally, pressing against the protruding edge of the arc tile 35, so that the arc tile 35 is tightly attached to the top seat 23. At this time, the arc seat 13 on the upper partition plate 9 just presses on the arc tile 35, pressing the arc tile 35 into the arc groove 29 of the lower partition plate 9. This process is repeated to firmly fix each layer of arc tiles 35. When transported to the outdoor stacking area, they can be hoisted off the chain conveyor 1 and placed in the stacking area for storage. During this process, the handle 32 can be rotated to make the locking block 34 lock into the locking groove 31 on the guide rod 7, locking multiple partition plates 9 to prevent them from shaking up and down. Finally, they can be centrally packaged by a dedicated intelligent packaging equipment packaging line for subsequent transportation.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stacking and conveying device for the production of colored stone metal tiles, comprising a chain conveyor (1), characterized in that: A stacking tray (4) is placed on the upper end of the chain conveyor (1). A locking device is provided between the stacking tray (4) and the chain conveyor (1). Two guide rods (7) are symmetrically fixedly installed on the upper end of the stacking tray (4). Multiple partition plates (9) are arranged in a linear array above the stacking tray (4). A dispersing device is provided between the partition plate (9) and the chain conveyor (1). The partition plate (9) at the bottom is fixed to the guide rod (7). The partition plates (9) except those at the bottom are slidably connected to the guide rod (7). Multiple arc grooves (29) are linearly arranged on the upper surface of the partition plates (9) except those at the top. Two arc seats (13) are symmetrically fixedly installed on the lower end of the partition plates (9) except those at the bottom. A fixing device is provided on the partition plate (9). The dispersing component includes a rail frame (5) fixedly installed at the rear end of the frame of the chain conveyor (1). Multiple dispersing rails (6) are evenly distributed and embedded at the front end of the rail frame (5). The length of the multiple dispersing rails (6) decreases from bottom to top. Dispersing wheels (8) are installed at the middle of the rear end of multiple partition plates (9) except those located at the bottom. The multiple dispersing wheels (8) correspond to the multiple dispersing rails (6) respectively. The fixing element includes two top seats (23) that extend symmetrically to the rear ends of multiple partition plates (9) except for the top. Each of the multiple partition plates (9) except for the bottom has two protruding ears (20) that extend symmetrically to the rear ends. Each of the two protruding ears (20) has a top clamping bracket (21) that is rotatably mounted at the end. An ear bracket (22) is rotatably mounted between the ends of the two top clamping brackets (21). Two top ears (12) are symmetrically fixed on the ear bracket (22). The locking plate component includes two top plates (11) elastically installed at the front and rear ends of the stacking tray (4). Both ends of the top plates (11) are rotatably mounted with locking pushers (26). The locking pushers (26) are inclined. The ends of the locking pushers (26) are rotatably mounted with locking lugs (27). The locking lugs (27) are slidably connected to the stacking tray (4). The locking lugs (27) are T-shaped.

2. The stacking and conveying device for producing colored stone metal tiles according to claim 1, characterized in that: Multiple limiting blocks (14) are slidably installed on the outer surfaces of the two guide rods (7). The multiple limiting blocks (14) are closely attached to the multiple partition plates (9). A carrier (10) is embedded between the opposite sides of the two limiting blocks (14) on the same horizontal line. Two column seats (15) are symmetrically embedded on the upper end face of the carrier (10). A guide post (16) extends from the end of the column seat (15). A sliding sleeve (18) is slidably installed on the outer surface of the guide post (16). The upper end of the sliding sleeve (18) is fixed to the ear bracket (22). A positioning cap (17) is coaxially embedded at the end of the guide post (16). A return spring (19) is wound around the outside of the guide post (16). The two ends of the return spring (19) are fixed to the sliding sleeve (18) and the column seat (15) respectively.

3. The stacking and conveying device for producing colored stone metal tiles according to claim 1, characterized in that: The upper end of the partition plate (9) located at the top has two rotatable handles (32) symmetrically rotatably mounted. A connecting frame (33) is fixedly mounted on the outer surface of the rotatable handle (32). A locking block (34) is fixedly mounted at the end of the connecting frame (33). A slot (31) is opened on the outer surface of the guide rod (7). The slot (31) corresponds to the locking block (34).

4. The stacking and conveying device for producing colored stone metal tiles according to claim 1, characterized in that: The chain conveyor (1) has multiple sets of positioning blocks (3) evenly distributed and fixedly installed on the chain plate. Each set of positioning blocks (3) has four blocks, and the four positioning blocks (3) are arranged in a square array. The stacking tray (4) is attached to the inner side of one set of positioning blocks (3). The opposite surfaces of the four positioning blocks (3) are provided with locking grooves (28), and the locking lugs (27) correspond to the locking grooves (28).

5. A stacking and conveying device for producing colored stone metal tiles according to claim 4, characterized in that: The top plate (11) extends symmetrically with two sliding columns (24) relative to the end face of the stack (4). The sliding columns (24) slide through the stack (4). A spring body (25) is wound around the outside of the sliding column (24). The two ends of the spring body (25) are fixed to the stack (4) and the top plate (11) respectively. A locking wheel (30) is installed in the middle of the end face of the top plate (11) opposite to the stack (4). Two locking frames (2) are symmetrically fixed on the upper end of the frame of the chain conveyor (1). The locking wheel (30) corresponds to the end of the locking frame (2).

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