An opening and closing culling device

Abstract

The utility model belongs to packaging bag elimination technical field discloses a kind of opening and closing elimination device.The device mainly includes rack, feeding mechanism, elimination mechanism and conveying mechanism;Wherein rack is set in preset position;Feeding mechanism is set in rack, feeding mechanism can receive workpiece incoming material, and workpiece is sent along first direction;Elimination mechanism is set in the downstream of feeding mechanism, elimination mechanism has conveying state and elimination state, when elimination mechanism is in conveying state, elimination mechanism is flush with the height of feeding mechanism, to be able to convey good product to the downstream unloading mechanism;When elimination mechanism is in elimination state, the end close to feeding mechanism can be raised, and elimination gap is formed with feeding mechanism;Conveying mechanism is set below the junction of feeding mechanism and elimination mechanism, defective product can drop to conveying mechanism through elimination gap.The device structure is simple, realizes the separation of good product and defective product, and in elimination process, continuous feeding can be carried out, and the continuity of operation is higher.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag rejection technology, and in particular to an opening and closing rejection device. Background Technology

[0002] In the packaging bag printing industry, the requirements for printing quality are becoming increasingly stringent. Therefore, the precision of quality inspection and control before packaging bags are put into use is also increasing. Thus, once defects are identified in a packaging bag, it should be quickly rejected to prevent it from entering subsequent workflows. Relying solely on manual rejection of defective products is not only slow and inaccurate, but also costly and cannot be used for extended periods, resulting in low safety. However, existing rejection devices are complex in structure, expensive to operate, and cannot continuously feed materials during the rejection process, leading to poor operational continuity.

[0003] Therefore, there is an urgent need for an opening and closing rejection device to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide an opening and closing rejection device that is not only simple in structure and can separate good products from defective products, but also can continuously feed materials during the rejection process, resulting in a high degree of operational continuity.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An opening and closing rejection device, comprising:

[0007] The rack is set in the preset position;

[0008] A feeding mechanism is provided on the frame, which can receive incoming workpieces and transport the workpieces along a first direction;

[0009] A rejection mechanism is located downstream of the feeding mechanism. The rejection mechanism has a conveying state and a rejection state. When the rejection mechanism is in the conveying state, the height of the rejection mechanism is flush with that of the feeding mechanism so that good products can be conveyed to the downstream unloading mechanism. When the rejection mechanism is in the rejection state, the end of the rejection mechanism near the feeding mechanism can be raised to form a rejection gap with the feeding mechanism.

[0010] A conveying mechanism is located below the junction of the feeding mechanism and the rejection mechanism, allowing defective products to fall through the rejection gap onto the conveying mechanism.

[0011] Preferably, the rejection mechanism includes a guide plate disposed below the rejection mechanism, and when the rejection mechanism is in the rejection state, the defective product can slide down the guide plate onto the conveying mechanism.

[0012] Preferably, the guide plate has a guide portion at one end near the feeding mechanism, and the guide portion is inclined toward the rejection mechanism.

[0013] Preferably, an air blowing mechanism is provided at the junction of the feeding mechanism and the rejection mechanism. The air blowing mechanism is configured to blow air toward the defective product so that the defective product can fall to the conveying mechanism.

[0014] Preferably, the rejection mechanism further includes a drive roller, a tension roller, a transmission roller, and a rejection belt. The drive roller and the transmission roller respectively engage to tension the rejection belt. A plurality of tension rollers are arranged between the drive roller and the transmission roller to tension the rejection belt. The guide plate is located below the transmission roller.

[0015] Preferably, the rejection mechanism further includes a drive component, a rotating shaft, and a drive plate. The output end of the drive component is hinged to one end of the drive plate. The rotating shaft passes through the drive plate and is hinged to the frame. The rotating shaft is also hinged to the drive plate. The other end of the drive plate is connected to the transmission roller. The guide plate is connected to the drive plate.

[0016] Preferably, the feeding mechanism includes a drive roller, a driven roller, a tensioning roller, and a feeding belt. The drive roller and the driven roller respectively engage to tension the feeding belt. A plurality of tensioning rollers are arranged between the drive roller and the driven roller to tension the feeding belt, and one tensioning roller is at the same height as the driven roller.

[0017] Preferably, the feeding mechanism further includes an adjusting plate and a floating roller. The adjusting plate is slidably connected to the frame, and the tension roller, which is at the same height as the driven roller, is disposed on the adjusting plate. The feeding belt passes around the floating roller. The adjusting plate is configured to slide along the first direction, and the floating roller is configured to float in the vertical direction to adjust the preload of the feeding belt.

[0018] Preferably, a pressure roller mechanism is provided at the end of the rejection mechanism away from the feeding mechanism, and the pressure roller mechanism is located above the rejection mechanism, so that the good product can pass between the pressure roller mechanism and the rejection mechanism.

[0019] Preferably, the pressure roller mechanism includes multiple pressure rollers and axles, the shaft is mounted on the frame, and the multiple pressure rollers are spaced apart on the outer periphery of the axles.

[0020] The beneficial effects of this utility model are:

[0021] This utility model discloses an opening and closing rejection device. The device mainly includes a frame, a feeding mechanism, a rejection mechanism, and a conveying mechanism; wherein the frame is set in a preset position; the feeding mechanism is set on the frame, and the feeding mechanism can receive incoming workpieces and convey the workpieces along a first direction; the rejection mechanism is set downstream of the feeding mechanism, and the rejection mechanism has a conveying state and a rejection state. When the rejection mechanism is in the conveying state, the rejection mechanism is at the same height as the feeding mechanism, so that good products can be conveyed to the downstream unloading mechanism; when the rejection mechanism is in the rejection state, the end of the rejection mechanism near the feeding mechanism can be raised, forming a rejection gap with the feeding mechanism; the conveying mechanism is set below the junction of the feeding mechanism and the rejection mechanism, and defective products can fall into the conveying mechanism through the rejection gap.

[0022] In this device, the frame ensures the stability of the operation. When the incoming material is a good product, the rejection mechanism is in conveying mode, receiving the good product from the end of the feeding mechanism and quickly transferring it to the unloading mechanism. When the incoming workpiece is a defective product, the rejection mechanism is in rejection mode, with one end tilted up to form a rejection gap. The defective product can then fall through the rejection gap onto the conveying mechanism, while the feeding mechanism maintains its feeding state. This device is not only simple in structure but also easy to operate, eliminating the need for manual rejection, ensuring operational safety, reducing overall manufacturing costs, and enabling continuous feeding while achieving automatic rejection, thus ensuring operational continuity. Attached Figure Description

[0023] Figure 1 This is an isometric view of the opening and closing rejection device described in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the rejection mechanism described in an embodiment of the present utility model;

[0025] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0026] Figure 4 This is a schematic diagram of the feeding mechanism described in an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the pressure roller mechanism described in an embodiment of the present invention.

[0028] In the picture:

[0029] 10. Frame; 11. Floating tank;

[0030] 20. Feeding mechanism; 21. Driven roller; 22. Driven roller; 23. Tensioning roller; 24. Feeding belt; 25. Adjusting plate; 26. Floating roller; 27. Slide rail; 28. Slider;

[0031] 30. Rejection mechanism; 31. Drive roller; 32. Tension roller; 33. Transmission roller; 34. Rejection belt; 35. Guide plate; 351. Guide section; 36. Drive component; 37. Rotating shaft; 38. Drive plate;

[0032] 40. Conveying mechanism;

[0033] 50. Pressure roller mechanism; 51. Pressure roller; 52. Wheel axle; 53. Fixed base; 54. Bearing; 55. Retaining ring;

[0034] 60. Feeding mechanism;

[0035] 100. Workpiece. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this utility model, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0040] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1 to 5 As shown, this utility model provides an opening and closing rejection device, which mainly includes a frame 10, a feeding mechanism 20, a rejection mechanism 30, and a conveying mechanism 40. The frame 10 is set in a preset position. The feeding mechanism 20 is set on the frame 10 and can receive the workpiece 100 and convey the workpiece 100 along a first direction. The rejection mechanism 30 is set downstream of the feeding mechanism 20 and has a conveying state and a rejection state. When the rejection mechanism 30 is in the conveying state, the height of the rejection mechanism 30 is flush with that of the feeding mechanism 20 so that good products can be conveyed to the downstream unloading mechanism 60. When the rejection mechanism 30 is in the rejection state, the end of the rejection mechanism 30 near the feeding mechanism 20 can be raised to form a rejection gap with the feeding mechanism 20. The conveying mechanism 40 is set below the junction of the feeding mechanism 20 and the rejection mechanism 30, and defective products can fall into the conveying mechanism 40 through the rejection gap.

[0042] In this device, the frame 10 ensures the stability of the device's operation. When the incoming material is a good product, the rejection mechanism 30 is in conveying mode. At this time, the rejection mechanism 30 can receive the incoming material (good product) from the end of the feeding mechanism 20 and quickly transfer the good product to the unloading mechanism 60. When the incoming workpiece 100 is a defective product, the rejection mechanism 30 is in rejection mode, with one end tilted up to form a rejection gap. At this time, the defective product can fall through the rejection gap onto the conveying mechanism 40, while the feeding mechanism 20 can still maintain its feeding state. This device is not only simple in structure but also easy to operate. It eliminates the need for manual rejection, ensuring operational safety and reducing overall manufacturing costs. Furthermore, it enables continuous feeding while achieving automatic rejection, ensuring the continuity of operations.

[0043] It is worth noting that an identification structure is provided upstream of the feeding mechanism 20. This structure can identify the workpiece 100 and determine whether it is a good or defective product based on its appearance characteristics. The structure then transmits the instruction to the rejection mechanism 30, which can switch between the feeding state and the rejection state based on the corresponding identification signal. Since the identification mechanism uses existing technology, its identification principle will not be elaborated in this embodiment.

[0044] Furthermore, such as Figures 1-3 As shown, the rejection mechanism 30 includes a guide plate 35, which is disposed below the rejection mechanism 30. When the rejection mechanism 30 is in the rejection state, defective products can slide down along the guide plate 35 onto the conveying mechanism 40. By setting the guide plate 35, the smoothness of the defective products sliding down can be improved, and it can be ensured that the defective products slide down in a preset direction and do not fall randomly, thereby ensuring a good rejection effect.

[0045] Preferably, such as Figure 3 As shown, a guide portion 351 is provided at one end of the guide plate 35 near the feeding mechanism 20, and the guide portion 351 is inclined in a direction closer to the rejection mechanism 30. By providing the guide portion 351, not only can it provide a good guiding effect for defective products to enter the rejection gap from the end of the feeding mechanism 20, but it can also close the gap between the guide plate 35 and the rejection mechanism 30, preventing defective products from entering the gap between the guide plate 35 and the rejection mechanism 30 instead of falling onto the conveying mechanism 40 through the rejection gap, thus avoiding the problem of equipment jamming and ensuring a good rejection effect.

[0046] It is worth noting that in this embodiment, the workpiece 100 is a packaging bag. In different application scenarios, the material of the packaging bag varies. When encountering a hard bag or a bag with a smooth surface, jamming or slippage may occur, potentially affecting the rejection effect. To solve this problem, an air blowing mechanism is also provided at the junction of the feeding mechanism 20 and the rejection mechanism 30. This air blowing mechanism is configured to blow air towards the defective product, allowing it to fall to the conveying mechanism 40. By setting up the air blowing mechanism, the defective product can be assisted in falling, thus cooperating with the guide plate 35 to further improve the rejection effect and avoid excessive accumulation of defective products in the rejection gap, which would affect the subsequent conveying of good products.

[0047] Preferably, such as Figures 1-3 As shown, the rejection mechanism 30 also includes a drive roller 31, a tension roller 32, a transmission roller 33, and a rejection belt 34. The drive roller 31 and the transmission roller 33 respectively engage to tension the rejection belt 34. Multiple tension rollers 32 are arranged between the drive roller 31 and the transmission roller 33 to tension the rejection belt 34. The guide plate 35 is located below the transmission roller 33. That is, after the drive roller 31 rotates, it can drive the rejection belt 34 to rotate around the transmission roller 33, and the multiple tension rollers 32 can maintain the tension of the rejection belt 34 to prevent slack. The friction of the rejection belt 34 surface drives the good products into the downstream unloading mechanism 60.

[0048] It should be noted that in this embodiment, a tension roller 32 is flush with the height of the drive roller 33 and is located at the end of the rejection mechanism 30, and the drive roller 31 is located directly below the tension roller 32; in addition, the rejection belt 34 has a small width, but multiple belts are spaced apart to ensure sufficient conveying force while also conveying multiple good products, thereby improving work efficiency.

[0049] Furthermore, such as Figures 1-3 As shown, the rejection mechanism 30 also includes a drive component 36, a rotating shaft 37, and a drive plate 38. The output end of the drive component 36 is hinged to one end of the drive plate 38. The rotating shaft 37 passes through the drive plate 38 and is hinged to the frame 10, and the rotating shaft 37 is also hinged to the drive plate 38. The other end of the drive plate 38 is connected to the transmission roller 33, and the guide plate 35 is connected to the drive plate 38. In this structure, when the output end of the drive component 36 retracts, the end of the drive plate 38 connected to it moves accordingly, and the drive plate 38 rotates around the rotating shaft 37. Consequently, the other end of the drive plate 38 tilts upward, thereby causing the transmission roller 33 to tilt upward as well, forming a rejection gap with the feeding mechanism 20. Conversely, when the output end of the drive component 36 extends, the drive plate 38 can drive the transmission roller 33 to move downward, switching to the conveying state. The overall structure is simple, and installation and use are extremely convenient. The switching between the rejection state and the conveying state can be completed simply by extending and retracting the drive component 36, significantly reducing manufacturing and usage costs.

[0050] It should be noted that in this embodiment, the driving component 36 is a cylinder. Cylinders have a simple structure, are inexpensive, and are easy to install and use. In addition, a tensioning roller 32 is provided between the rotating shaft 37 and the transmission roller 33. The tensioning roller 32 is mounted on the driving plate 38 and moves up or down with the driving plate 38. This allows the preload of the rejection belt 34 to be adjusted when switching between rejection and conveying states, ensuring that the rejection belt 34 is tensioned while avoiding breakage due to excessive tension.

[0051] In addition, such as Figure 1 and Figure 4 As shown, the feeding mechanism 20 includes a drive roller 21, a driven roller 22, a tension roller 23, and a feeding belt 24. The drive roller 21 and the driven roller 22 respectively engage with the feeding belt 24. Multiple tension rollers 23 are arranged between the drive roller 21 and the driven roller 22 to tension the feeding belt 24, and one tension roller 23 is at the same height as the driven roller 22. That is, after the drive roller 21 rotates, it can drive the feeding belt 24 to rotate around the driven roller 22, and the multiple tension rollers 23 can maintain the tension of the feeding belt 24 to prevent slack. The workpiece 100 is moved along the first direction by the friction force on the surface of the feeding belt 24. The overall structure is simple, easy to install, and significantly improves the feeding efficiency.

[0052] In addition, such as Figure 4As shown, the feeding mechanism 20 also includes an adjusting plate 25 and a floating roller 26. The adjusting plate 25 is slidably connected to the frame 10. A tension roller 23, at the same height as the driven roller 22, is disposed on the adjusting plate 25. The feeding belt 24 passes around the floating roller 26. The adjusting plate 25 is configured to slide in a first direction, and the floating roller 26 can float in the vertical direction to adjust the preload of the feeding belt 24. Since the workstation where the feeding mechanism 20 receives incoming materials may not be convenient to place the entire device, the horizontal length of the feeding mechanism 20 can be extended by sliding the adjusting plate 25, thereby facilitating docking and significantly improving ease of use.

[0053] Specifically, such as Figure 4 As shown, a slider 28 is provided on the inner side of the frame 10, and a slide rail 27 is provided on the outer side of the adjusting plate 25. The slider 28 and the slide rail 27 are slidably connected. The frame 10 also has a floating groove 11 in the vertical direction. The two ends of the floating roller 26 are set in the floating groove 11. When feeding is required, the adjusting plate 25 can be fixed on both sides by the fixing block to prevent it from sliding. When it is necessary to extend the length of the feeding end, the fixing block can be removed and the adjusting plate 25 can be slid to extend its horizontal feeding section to the preset length. At the same time, the floating roller 26 can float in the floating groove 11 to adjust the tension of the feeding belt 24. It is necessary to ensure that the feeding belt 24 is always in a taut state, and to avoid it from breaking due to excessive tension, thereby ensuring a good feeding effect and improving the convenience of use.

[0054] To ensure that good products can smoothly reach the feeding mechanism 60, such as Figure 1 and Figure 5 As shown, a pressure roller mechanism 50 is also provided at the end of the rejection mechanism 30 away from the feeding mechanism 20, and the pressure roller mechanism 50 is located above the rejection mechanism 30, allowing good products to pass between the pressure roller mechanism 50 and the rejection mechanism 30. In this structure, the pressure roller mechanism 50 plays a good guiding and limiting role, improving the feeding efficiency and ensuring the accuracy of the feeding position.

[0055] Preferably, such as Figure 1 and Figure 5 As shown, the pressure roller mechanism 50 includes multiple pressure rollers 51 and axle 52. The axle 52 is mounted on the frame 10, and the multiple pressure rollers 51 are spaced apart on the outer periphery of the axle 52. This arrangement can simultaneously complete the feeding of multiple good products, achieving uniform feeding.

[0056] It should be noted that in this embodiment, the pressure roller mechanism 50 also includes a fixed seat 53, a bearing 54, and a retaining ring 55. The two ends of the wheel axle 52 are mounted on the frame 10 through the fixed seat 53. Each pressure roller 51 is rotatably connected to the outer periphery of the wheel axle 52 through the bearing 54. Each pressure roller 51 is provided with a retaining ring 55 on both sides, thereby ensuring that each pressure roller 51 can only rotate in the corresponding position and will not be offset during material feeding.

[0057] Referring to the accompanying drawings, the working process of the opening and closing rejection device in this embodiment is described as follows:

[0058] First, the upstream identification mechanism of this device identifies the workpiece 100, while the feeding mechanism 20 feeds the workpiece.

[0059] Secondly, when the incoming material is a defective product, the rejection mechanism 30 switches to the rejection state. After the defective product passes the end of the feeding mechanism 20, it falls onto the conveying mechanism 40 through the rejection gap, thus completing the rejection of the defective product.

[0060] Finally, when the incoming material is a good product, the rejection mechanism 30 switches to the conveying state, thereby conveying the good product to the pressure roller mechanism 50, and after passing through the pressure roller mechanism 50, it falls onto the unloading mechanism 60.

[0061] In summary, the opening and closing rejection device in this embodiment is not only simple in structure and achieves the separation of good and defective products, but also can continuously feed materials during the rejection process, resulting in a high degree of operational continuity.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An opening and closing rejection device, characterized in that, include: The rack (10) is set in a preset position; A feeding mechanism (20) is provided on the frame (10). The feeding mechanism (20) can receive the workpiece (100) and transport the workpiece (100) along the first direction. The rejection mechanism (30) is located downstream of the feeding mechanism (20). The rejection mechanism (30) has a conveying state and a rejection state. When the rejection mechanism (30) is in the conveying state, the rejection mechanism (30) is flush with the feeding mechanism (20) so that good products can be conveyed to the downstream unloading mechanism (60). When the rejection mechanism (30) is in the rejection state, the end of the rejection mechanism (30) near the feeding mechanism (20) can be raised and form a rejection gap with the feeding mechanism (20). The conveying mechanism (40) is located below the junction of the feeding mechanism (20) and the rejection mechanism (30), and the defective products can fall into the conveying mechanism (40) through the rejection gap.

2. The opening and closing rejection device according to claim 1, characterized in that, The rejection mechanism (30) includes a guide plate (35) which is located below the rejection mechanism (30). When the rejection mechanism (30) is in the rejection state, the defective product can slide down the guide plate (35) onto the conveying mechanism (40).

3. The opening and closing rejection device according to claim 2, characterized in that, The guide plate (35) has a guide part (351) at one end near the feeding mechanism (20), and the guide part (351) is inclined toward the rejection mechanism (30).

4. The opening and closing rejection device according to claim 2, characterized in that, An air blowing mechanism is also provided at the junction of the feeding mechanism (20) and the rejection mechanism (30). The air blowing mechanism is configured to blow air toward the defective product so that the defective product can fall to the conveying mechanism (40).

5. The opening and closing rejection device according to claim 2, characterized in that, The rejection mechanism (30) further includes a drive roller (31), a tension roller (32), a transmission roller (33), and a rejection belt (34). The drive roller (31) and the transmission roller (33) respectively engage to tension the rejection belt (34). A plurality of tension rollers (32) are arranged between the drive roller (31) and the transmission roller (33) to tension the rejection belt (34). The guide plate (35) is located below the transmission roller (33).

6. The opening and closing rejection device according to claim 5, characterized in that, The rejection mechanism (30) further includes a drive member (36), a rotating shaft (37), and a drive plate (38). The output end of the drive member (36) is hinged to one end of the drive plate (38). The rotating shaft (37) passes through the drive plate (38) and is hinged to the frame (10). The rotating shaft (37) is hinged to the drive plate (38). The other end of the drive plate (38) is connected to the transmission roller (33). The guide plate (35) is connected to the drive plate (38).

7. The opening and closing rejection device according to claim 1, characterized in that, The feeding mechanism (20) includes a drive roller (21), a driven roller (22), a tension roller (23), and a feeding belt (24). The drive roller (21) and the driven roller (22) respectively engage to tension the feeding belt (24). A plurality of tension rollers (23) are arranged between the drive roller (21) and the driven roller (22) to tension the feeding belt (24), and one tension roller (23) is at the same height as the driven roller (22).

8. The opening and closing rejection device according to claim 7, characterized in that, The feeding mechanism (20) also includes an adjusting plate (25) and a floating roller (26). The adjusting plate (25) is slidably connected to the frame (10). The tension roller (23), which is at the same height as the driven roller (22), is disposed on the adjusting plate (25). The feeding belt (24) passes around the floating roller (26). The adjusting plate (25) is configured to slide along the first direction, and the floating roller (26) is able to float in the vertical direction to adjust the preload of the feeding belt (24).

9. The opening and closing rejection device according to claim 1, characterized in that, The rejection mechanism (30) is further provided with a pressure roller mechanism (50) at one end away from the feeding mechanism (20), and the pressure roller mechanism (50) is located above the rejection mechanism (30), so that the good product can pass between the pressure roller mechanism (50) and the rejection mechanism (30).

10. The opening and closing rejection device according to claim 9, characterized in that, The pressure roller mechanism (50) includes multiple pressure rollers (51) and axle (52), the axle (52) is mounted on the frame (10), and the multiple pressure rollers (51) are spaced apart on the outer periphery of the axle (52).

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