A perfect binding thread book stacking device

Abstract

This invention belongs to the field of conveying technology, specifically disclosing a perfect binding book stacking device. It includes a belt conveyor mechanism with a stacking frame installed at the front end of the belt conveyor in the output direction. The stacking frame can collect and stack books conveyed on the surface of the belt conveyor mechanism. A suspended conveyor mechanism is arranged in front of the stacking frame, and a pushing mechanism is arranged below the stacking frame. Multiple suspension rods are evenly arranged inside the suspended conveyor mechanism, and a collection mechanism is installed at the bottom of each suspension rod. This invention uses a belt conveyor mechanism to transport books to the stacking frame, where the books are stacked and collected to form a stack. The suspended conveyor mechanism enables vertical transport of the stacked books, facilitating subsequent book sorting and storage while reducing friction and damage to the book covers, pages, and perfect binding.

Description

Technical Field

[0001] This invention belongs to the field of conveying technology, and specifically discloses a binding thread stacking device. Background Technology

[0002] Perfect binding is a binding method that uses adhesive to fix the pages of printed materials to the spine. It is widely used in binding books, albums, tender documents, and other printed materials. After perfect binding, the individual books need to be arranged into an orderly stack for easy storage.

[0003] Existing perfect binding line book stacking devices typically use belt conveyors to stack and transport the books. This method can easily cause wear and tear on the bottom books, affecting the perfect binding effect and reducing production quality. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a perfect binding thread stacking device to solve the problem that the existing technology usually uses belt conveyor to stack and transport books, which can easily cause wear and compression to the bottom book, affecting the perfect binding effect and reducing production quality.

[0005] To achieve the above objectives, the present invention provides a perfect binding book stacking device, including a belt conveyor mechanism. A stacking frame is installed at the front end of the belt conveyor mechanism in the output direction. The stacking frame is capable of stacking and collecting books conveyed on the surface of the belt conveyor mechanism. A suspended conveyor mechanism is provided in front of the stacking frame, and a pushing mechanism is provided below the stacking frame. Multiple suspension rods are evenly arranged inside the suspended conveyor mechanism, and a collection mechanism is installed at the bottom of the suspension rods. The pushing mechanism is used to push and transport the stacked books inside the stacking frame, and the collection mechanism is used to collect the books pushed by the pushing mechanism.

[0006] In the above technical solution, preferably, L-shaped side plates are fixedly installed on both sides of the bottom of the stacking frame, the pushing mechanism includes a bottom block, the bottom block is located directly below the stacking frame, a lifting frame is movably arranged above the bottom block, guide rods are fixedly installed at the four corners of the bottom of the lifting frame, the surfaces of the guide rods are movably inserted into the interior of the bottom block, a first support plate is provided inside the lifting frame, a path groove is opened on the surface of the L-shaped side plate, protruding columns are installed on both sides of the lifting frame, the surfaces of the protruding columns are movably installed in the path groove, and a first cylinder is provided behind the bottom block, the output end of the first cylinder is connected to the bottom block.

[0007] In the above technical solution, preferably, the path groove includes an inclined groove and a horizontal groove, the end of the path groove located directly below the stacking frame is set as the inclined groove, and the front end of the inclined groove is connected to the horizontal groove.

[0008] In the above technical solution, preferably, a lifting mechanism is provided on the surface of the L-shaped side plate above the inclined groove. The lifting mechanism includes a plug-in plate, which is movably plugged into the side of the stacking frame. A rectangular rod is fixedly installed at one end of the plug-in plate outside the stacking frame. A limiting groove is formed on the surface of the L-shaped side plate between the inclined groove and the plug-in plate. A tension spring is provided inside the limiting groove. A limiting block is connected to the top of the tension spring. The limiting block is slidably installed in the limiting groove. A light rod is fixedly connected to the middle of the limiting block. A first connecting rod is connected to the end of the light rod and the end of the rectangular rod through a rotating shaft. An upward moving plate is fixedly installed at the bottom of the limiting block.

[0009] In the above technical solution, preferably, the surface of the lifting frame is provided with a groove, a spring is provided inside the groove, a sliding plate is installed at the front end of the spring, the front end of the sliding plate protrudes from the lifting frame, a rack is provided at the top of the sliding plate, a second support plate is fixedly connected to the front end of the first support plate, a gear is provided at the connection between the first support plate and the second support plate, a cylindrical rod is provided at the center of the gear, the end of the cylindrical rod is connected to the lifting frame, the gear meshes with the rack, and a touch plate is provided at the front end of the sliding plate.

[0010] In the above technical solution, preferably, the collection mechanism includes a collection platform, which is fixedly connected to the bottom of the suspension rod by bolts.

[0011] In the above technical solution, preferably, the surface of the collection platform is provided with a mating groove, the middle of the second support plate is provided with a first opening, the mating groove corresponds to the first opening, the inside of the collection platform is provided with a central groove, a crossbar is movably arranged inside the central groove, a second cylinder is arranged inside the central groove and at the front end of the crossbar, the output end of the second cylinder is connected to the crossbar, the end of the crossbar protrudes from the central groove, locking blocks are arranged on both sides of the collection platform, a rotating rod is arranged at the end of the crossbar, the top of the rotating rod is connected to the locking block, a stop is arranged at the end of the locking block near the pushing mechanism, and a second opening is provided in the middle of both sides of the first support plate, the second opening cooperates with the stop.

[0012] In the above technical solution, preferably, the surface of the snap-fit ​​block near the collection platform is provided with a guide groove, the front end of the guide groove is provided with an inclined boss, the two sides of the collection platform near the pushing mechanism are fixedly provided with cylindrical blocks, the cylindrical blocks are movably installed inside the guide groove, and the rotating rod and the crossbar are connected by a torsion spring.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Through the coordinated work of components such as belt conveyor, stacking frame, and pushing mechanism, books can be accurately stacked in the stacking frame and stably transported to the collection mechanism by the pushing mechanism. This reduces the misalignment and falling of books during the transportation process, greatly improves the collection success rate and work efficiency, and ensures the orderly stacking of books in the stacking frame.

[0015] The structural design of the lifting frame allows stacked books to stand upright stably, with the bound parts of the books located at the bottom. This facilitates subsequent book handling and storage, and reduces friction and damage to the book covers, pages, and bound parts, thus ensuring the quality of the books. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the belt conveyor mechanism of the present invention;

[0018] Figure 3 This is a schematic diagram of the lifting mechanism structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the pushing mechanism structure of the present invention;

[0020] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0021] Figure 6 This is a schematic diagram of the suspended conveying mechanism of the present invention;

[0022] Figure 7 This is a top sectional view of the collection platform of the present invention;

[0023] Figure 8 For the present invention Figure 3 Enlarged view of point B in the middle.

[0024] In the diagram: 1. Belt conveyor mechanism; 2. Suspended conveyor mechanism; 3. Stacking frame; 4. Pushing mechanism; 5. Collecting mechanism; 6. L-shaped side plate; 7. First cylinder; 8. Base block; 9. Guide rod; 10. Lifting frame; 11. First support plate; 12. Second support plate; 13. Gear; 14. Groove; 15. Spring; 16. Sliding plate; 17. Rack; 18. Contact plate; 19. Path groove; 2 0. Protruding column; 21. Upper moving plate; 22. Limiting groove; 23. Tension spring; 24. Limiting block; 25. Smooth rod; 26. First connecting rod; 27. Rectangular rod; 28. Insertion plate; 29. ​​Collection platform; 30. Center groove; 31. Second cylinder; 32. Crossbar; 33. Snap-fit ​​block; 34. Guide groove; 35. Cylindrical block; 36. Mating groove; 37. Stop block; 38. First opening; 39. Second opening. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0027] like Figures 1-8 The illustrated perfect binding book stacking device includes a belt conveyor mechanism 1. A stacking frame 3 is installed at the front end of the belt conveyor mechanism 1 in the output direction. The stacking frame 3 can stack and collect books conveyed on the surface of the belt conveyor mechanism 1. A suspended conveyor mechanism 2 is provided in front of the stacking frame 3, and a pushing mechanism 4 is provided below the stacking frame 3. Multiple suspension rods are evenly arranged inside the suspended conveyor mechanism 2, and a collection mechanism 5 is installed at the bottom of the suspension rods. The pushing mechanism 4 is used to push and transport the stacked books inside the stacking frame 3, and the collection mechanism 5 is used to collect the books pushed by the pushing mechanism 4. The belt conveyor mechanism 1 transports the books to the stacking frame 3, where the books are stacked and collected to form a stack of books. The suspended conveyor mechanism 2 is provided to vertically transport the stacked books, which facilitates subsequent book sorting and storage, and also reduces friction and damage to the book covers, pages, and perfect binding parts.

[0028] L-shaped side plates 6 are fixedly installed on both sides of the bottom of the stacking frame 3. The pushing mechanism 4 includes a bottom block 8, which is located directly below the stacking frame 3. A lifting frame 10 is movably installed above the bottom block 8. Guide rods 9 are fixedly installed at the four corners of the bottom of the lifting frame 10. The surfaces of the guide rods 9 are movably inserted into the interior of the bottom block 8. A first support plate 11 is provided inside the lifting frame 10. A path groove 19 is opened on the surface of the L-shaped side plate 6. Protruding columns 20 are installed on both sides of the lifting frame 10. The surfaces of the protruding columns 20 are movably installed in the path groove 19. A first cylinder 7 is provided behind the bottom block 8. The output end of the first cylinder 7 is connected to the bottom block 8. When the stacked books inside the stacking frame 3 fall onto the surface of the first support plate 11, the first cylinder 7 extends, which can drive the bottom block 8 to move forward of the device. Thus, the stacked books will also move forward of the device synchronously, completing the stacking and transfer of books.

[0029] The path groove 19 includes an inclined groove and a horizontal groove. The end of the path groove 19 located directly below the stacking frame 3 is set as an inclined groove. The front end of the inclined groove is connected to the horizontal groove. When the first cylinder 7 extends and drives the bottom block 8 to move forward of the device, the protruding column 20 will first move from the inclined groove to the horizontal groove. At this time, under the action of components such as the guide rod 9, the lifting frame 10 will move downward. The first cylinder 7 continues to extend, and the bottom block 8 continues to move forward of the device. At this time, the protruding column 20 will move in the horizontal groove.

[0030] A lifting mechanism is provided on the surface of the L-shaped side plate 6 above the inclined groove. The lifting mechanism includes a plug-in plate 28, which is movably plugged into the side of the stacking frame 3. A rectangular rod 27 is fixedly installed at one end of the plug-in plate 28 on the outside of the stacking frame 3. A limiting groove 22 is formed on the surface of the L-shaped side plate 6 between the inclined groove and the plug-in plate 28. A tension spring 23 is provided inside the limiting groove 22. A limiting block 24 is connected to the top of the tension spring 23 and slides in the limiting groove 22. A smooth rod 25 is fixedly connected to the middle of the limiting block 24. The end of the smooth rod 25 is connected to the end of the rectangular rod 27 via a pivot and a first connecting rod 26. An upward moving plate 21 is fixedly installed at the bottom of the limiting block 24. The bottom of the upward moving plate 21 corresponds to the protruding column 20. When the lifting frame 10 is directly below the stacking frame 3, the protruding column 20 provides a certain distance from the upward moving plate 21. Under a certain squeezing action, the tension spring 23 is in a stretched state, and the limiting block 24 will move to the top of the limiting groove 22. At this time, the smooth rod 25 and the first connecting rod 26 will generate a certain pushing force on the rectangular rod 27, causing the insertion plate 28 to move out of the stacking frame 3. The books can fall directly onto the surface of the first support plate 11. When the lifting frame 10 moves downward, the protruding column 20 will also move downward at the same time. The protruding column 20 will release the upward squeezing force on the upper moving plate 21. Under the action of the tension spring 23, the upper moving plate 21 and the limiting block 24 will move downward synchronously. At this time, the smooth rod 25 and the first connecting rod 26 will generate a certain pulling force on the rectangular rod 27, causing the insertion plate 28 to be inserted into the stacking frame 3. At this time, the surface of the insertion plate 28 can support the books conveyed by the belt conveyor mechanism 1, so that the books can be stacked and collected in the stacking frame 3 to form a stack of books.

[0031] A groove 14 is formed on the surface of the lifting frame 10, and a spring 15 is installed inside the groove 14. A sliding plate 16 is installed at the front end of the spring 15, and the front end of the sliding plate 16 protrudes from the lifting frame 10. A rack 17 is provided on the top of the sliding plate 16. A second support plate 12 is fixedly connected to the front end of the first support plate 11. A gear 13 is provided at the connection between the first support plate 11 and the second support plate 12. A cylindrical rod is provided at the center of the gear 13, and the end of the cylindrical rod is connected to the lifting frame 10. The gear 13 meshes with the rack 17. A touch plate 18 is provided at the front end of the sliding plate 16. When the lifting frame 10 is directly below the stacking frame 3, the spring 15 is in a certain normal state. When the first cylinder 7 drives the pushing mechanism 4 to move towards the collecting mechanism 5, the touch plate 18 is activated. When the contact plate 18 contacts the collection mechanism 5, the first cylinder 7 continues to drive the pushing mechanism 4 to move. During this process, the sliding plate 16 gradually moves into the groove 14, the spring 15 gradually compresses, and the rack 17 drives the gear 13 to rotate. The first support plate 11 and the second support plate 12 rotate 90 degrees, so that the second support plate 12 rotates to the surface of the collection mechanism 5, and the stacked books stand up. The glued part of the books is at the bottom. At this time, the stacked books stand upright in the collection mechanism 5. This mechanism can ensure that the stacked books can fall accurately into the collection mechanism 5, avoid misalignment and falling of books, improve the success rate and efficiency of collection, and at the same time realize that the books stand up stably, which can reduce the damage caused by friction to the book cover, pages and glued parts, and ensure the quality of the books.

[0032] The collection mechanism 5 includes a collection platform 29, which is fixedly connected to the bottom of the suspension rod by bolts. The collection platform 29 is used for vertical storage of books.

[0033] The surface of the collection platform 29 is provided with a mating groove 36, and the middle of the second support plate 12 is provided with a first opening 38. The mating groove 36 corresponds to the first opening 38. The inside of the collection platform 29 is provided with a central groove 30, and a crossbar 32 is movably installed inside the central groove 30. A second cylinder 31 is installed inside the central groove 30 and at the front end of the crossbar 32. The output end of the second cylinder 31 is connected to the crossbar 32, and the end of the crossbar 32 protrudes from the central groove 30. The two sides of the collection platform 29 are provided with locking blocks 33, and the end of the crossbar 32 is provided with a rotating rod. The top of the rotating rod is connected to the locking block 33. The end of the locking block 33 near the pushing mechanism 4 is provided with a stop block 37. The middle of the two sides of the first support plate 11 is provided with a locking block 37. A second opening 39 is provided, which cooperates with a stop block 37. When the second support plate 12 rotates to the surface of the collection platform 29, the mating groove 36 corresponds to the first opening 38, and the second support plate 12 can be engaged in the mating groove 36. At this time, the surface of the second support plate 12 in contact with the book and the surface of the collection platform 29 are on the same horizontal plane. Then, the second cylinder 31 drives the crossbar 32 to move forward of the central groove 30, and the stop block 37 can pass through the second opening 39, which can push the book to the surface of the collection platform 29. This mechanism can smoothly push the book to the surface of the collection platform 29, ensuring the stability of book transmission and reducing the damage to the book during transmission.

[0034] The surface of the locking block 33 near the collection platform 29 is provided with a guide groove 34, and the front end of the guide groove 34 is provided with an inclined boss. Cylindrical blocks 35 are fixedly installed on both sides of the collection platform 29 near the pushing mechanism 4. The cylindrical blocks 35 are movably installed inside the guide groove 34. The rotating rod and the crossbar 32 are connected by a torsion spring. When the second cylinder 31 drives the crossbar 32 to move backward towards the center groove 30, the locking block 33 also moves backward synchronously. At this time, the cylindrical blocks 35 slide inside the guide groove 34. When the cylindrical blocks 35 contact the inclined boss, the locking block 33 is compressed as a whole. The locking block 33 then rotates around the rotating rod. The block 37 rotates outward from the collection platform 29, thus moving outward to prevent it from obstructing the books during transport. The second cylinder 31 drives the crossbar 32 to move forward from the center groove 30, and the locking block 33 moves forward simultaneously. At this time, the cylindrical block 35 slides inside the guide groove 34. When the cylindrical block 35 moves from the inclined boss to the back of the guide groove 34, there is no pressure between the cylindrical block 35 and the locking block 33. At this time, the locking block 33 will reset under the action of the torsion spring. The locking block 33 is now parallel to the collection platform 29, and the block 37 corresponds to the second opening 39.

[0035] Working principle: First, the belt conveyor 1 transports the books forward. When the books reach the stacking frame 3, the lifting frame 10 is directly below the stacking frame 3. The protruding column 20 presses against the moving plate 21, the tension spring 23 stretches, the limiting block 24 moves upward, and the smooth rod 25 and the first connecting rod 26 push the rectangular rod 27, causing the insertion plate 28 to move out of the stacking frame 3. The books fall directly onto the surface of the first support plate 11 inside the lifting frame 10. As the books are continuously transported, they gradually stack on the first support plate 11 to form a stack. Then, when the books in the stacking frame 3 are stacked, the first cylinder 7 extends, driving the bottom block 8 to move forward of the device. As the lifting frame 10 moves downward under the action of components such as the guide rod 9, the protruding column 20 first moves from the inclined groove to the horizontal groove, thus moving the stacked books synchronously forward of the device. At the same time, the protruding column 20 releases the upward pressing force on the upper moving plate 21. Under the action of the tension spring 23, the upper moving plate 21 and the limiting block 24 move downward synchronously. At this time, the light rod 25 and the first connecting rod 26 will generate a certain tension on the rectangular rod 27, so that the insertion plate 28 is inserted into the stacking frame 3. At this time, the surface of the insertion plate 28 can support the books conveyed by the belt conveyor mechanism 1, so that the books can be stacked and collected within the stacking frame 3. The books are stacked together, ready for the next book transfer operation. Then, as the lifting frame 10 moves towards the collecting mechanism 5, when the touch plate 18 contacts the collecting mechanism 5, the first cylinder 7 continues to drive the pushing mechanism 4 to move. At this time, the spring 15 in the groove 14 on the surface of the lifting frame 10 gradually compresses, and the sliding plate 16 moves into the groove 14. The rack 17 at its top drives the gear 13 to rotate, and the first support plate 11 and the second support plate 12 rotate 90 degrees, so that the second support plate 12 rotates to the surface of the collecting mechanism 5. The stacked books stand up, with the glued parts of the books at the bottom, ensuring that the books fall accurately into the collecting mechanism. Inside mechanism 5, the next step is for the second cylinder 31 to drive the crossbar 32 to move forward of the central groove 30. The stop block 37 passes through the second openings 39 on both sides of the first support plate 11, smoothly pushing the books onto the surface of the collection platform 29 to complete the collection of the books. Finally, the first cylinder 7 retracts, driving the bottom block 8 to move backward. Since the stacked books are clamped to the surface of the collection platform 29 by the stop block 37, when the second support plate 12 is completely removed from the inside of the mating groove 36, the elastic force of the spring 15 can cause the sliding plate 16 to extend out of the lifting frame 10. The first support plate 11 and the second support plate 12 will then rotate 90 degrees in opposite directions to complete the reset.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A book stacking device for perfect binding thread, comprising a belt conveyor mechanism (1), characterized in that, A stacking frame (3) is installed at the front end of the belt conveyor (1) in the output direction. The stacking frame (3) can stack and collect the books conveyed on the surface of the belt conveyor (1). A hanging conveyor (2) is provided in front of the stacking frame (3). A pushing mechanism (4) is provided below the stacking frame (3). Multiple hanging rods are evenly arranged inside the hanging conveyor (2). A collection mechanism (5) is installed at the bottom of the hanging rods. The pushing mechanism (4) is used to push and transmit the stacked books inside the stacking frame (3). The collection mechanism (5) is used to collect the books pushed by the pushing mechanism (4). L-shaped side plates (6) are fixedly installed on both sides of the bottom of the stacking frame (3). The pushing mechanism (4) includes a bottom block (8). The bottom block (8) is located directly below the stacking frame (3). A lifting frame (10) is movably arranged above the bottom block (8). Guide rods (9) are fixedly installed at the four corners of the bottom of the lifting frame (10). The surface of the guide rods (9) is movably inserted into the interior of the bottom block (8). A first support plate (11) is provided inside the lifting frame (10). A path groove (19) is opened on the surface of the L-shaped side plate (6). Protruding columns (20) are installed on both sides of the lifting frame (10). The surface of the protruding columns (20) is movably installed in the path groove (19). A first cylinder (7) is provided behind the bottom block (8). The output end of the first cylinder (7) is connected to the bottom block (8). The surface of the lifting frame (10) is provided with a groove (14), and a spring (15) is provided inside the groove (14). A sliding plate (16) is installed at the front end of the spring (15). The front end of the sliding plate (16) protrudes from the lifting frame (10). A rack (17) is provided at the top of the sliding plate (16). A second support plate (12) is fixedly connected to the front end of the first support plate (11). A gear (13) is provided at the connection between the first support plate (11) and the second support plate (12). A cylindrical rod is provided at the center of the gear (13). The end of the cylindrical rod is connected to the lifting frame (10). The gear (13) meshes with the rack (17). A touch plate (18) is provided at the front end of the sliding plate (16).

2. The perfect binding thread book stacking device according to claim 1, characterized in that, The path slot (19) includes an inclined slot and a horizontal slot. The end of the path slot (19) located directly below the stacking frame (3) is set as the inclined slot, and the front end of the inclined slot is connected to the horizontal slot.

3. The perfect binding thread book stacking device according to claim 2, characterized in that, A lifting mechanism is provided on the surface of the L-shaped side plate (6) above the inclined groove. The lifting mechanism includes a plug plate (28), which is movably plugged into the side of the stacking frame (3). A rectangular rod (27) is fixedly installed at one end of the plug plate (28) outside the stacking frame (3). A limiting groove (22) is opened on the surface of the L-shaped side plate (6) between the inclined groove and the plug plate (28). A tension spring (23) is provided inside the limiting groove (22). A limiting block (24) is connected to the top of the tension spring (23). The limiting block (24) is slidably installed in the limiting groove (22). A light rod (25) is fixedly connected to the middle of the limiting block (24). A first connecting rod (26) is connected to the end of the light rod (25) and the end of the rectangular rod (27) through a pivot. An upward moving plate (21) is fixedly installed at the bottom of the limiting block (24).

4. The perfect binding thread book stacking device according to claim 1, characterized in that, The collection mechanism (5) includes a collection platform (29), which is fixedly connected to the bottom of the suspension rod by bolts.

5. A book stacking device for perfect binding thread according to claim 4, characterized in that, The surface of the collection platform (29) is provided with a mating groove (36), and the middle of the second support plate (12) is provided with a first opening (38). The mating groove (36) corresponds to the first opening (38). The inside of the collection platform (29) is provided with a central groove (30), and a crossbar (32) is movably arranged inside the central groove (30). A second cylinder (31) is arranged inside the central groove (30) and at the front end of the crossbar (32). The output end of the second cylinder (31) is connected to the... A crossbar (32) is provided with its end protruding from the central groove (30). The collection platform (29) is provided with snap-fit ​​blocks (33) on both sides. The end of the crossbar (32) is provided with a rotating rod. The top of the rotating rod is connected to the snap-fit ​​block (33). The snap-fit ​​block (33) is provided with a stop block (37) at one end near the pushing mechanism (4). The middle of both sides of the first support plate (11) is provided with a second opening (39). The second opening (39) cooperates with the stop block (37).

6. The perfect binding thread book stacking device according to claim 5, characterized in that, The snap-fit ​​block (33) has a guide groove (34) on its surface near the collection platform (29). The front end of the guide groove (34) has an inclined boss. The collection platform (29) has cylindrical blocks (35) fixedly installed on both sides near the pushing mechanism (4). The cylindrical blocks (35) are movably installed inside the guide groove (34). The rotating rod and the crossbar (32) are connected by a torsion spring.

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