FPC feeding device

Abstract

The utility model relates to the technical field of flexible board processing, and relates to an FPC feeding device. A material frame loaded with flexible plates is conveyed to the material taking station through the conveying track, after the material blocking assembly blocks and positions the material frame, the jacking assembly jacks and positions the material frame on the material taking station to conduct flexible plate discharging, meanwhile, partition paper between two flexible plates is placed in the material frame of the discharging station, and after flexible plate discharging is completed, the partition paper is placed in the material frame of the discharging station. The lifting component drives the transfer belt line to ascend to move the material frame on the conveying rail to the material receiving height the same as the material receiving height of the discharging rail, the transfer belt line drives the material frame to be conveyed to the discharging rail, and therefore conveying and feeding of the FPC flexible board are completed, an operator only needs to add the material frame loaded with the flexible board, and the operation is convenient. The workload and the working intensity of operators are reduced to the maximum extent, and feeding of the flexible plates and recycling of the partition paper are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible plate processing, in particular to an FPC feeding device. Background Art

[0002] FPC (flexible circuit board) requires the assembly and soldering of various functional components to form a complete circuit. During the assembly and processing of flexible circuit boards (abbreviated as FPC), different components need to be soldered multiple times, so the FPC needs to be repeatedly placed on the high-temperature board, and after the components are attached and reflow soldered, the FPC needs to be removed from the high-temperature board. The FPC needs to be separated with separator paper to prevent damage to the components. The separated FPC is then transported to the front end of the line and placed on the high-temperature board again. However, in the existing production process, the operation process is that personnel carry the FPC from the back of the oven to the equipment for loading, which will directly contact the FPC, posing some risks in handling and loading. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an FPC feeding device which can reduce the workload and work intensity of the operator to the greatest extent and facilitate the feeding of the flexible plate and the recovery of the separator paper.

[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0005] An FPC feeding device, comprising:

[0006] Conveyor track, on which loading station, retrieving station and unloading station are set;

[0007] The material frame is arranged on the conveying track, and the conveying track is used to transport the material frame loaded with the flexible plate from the loading station to the retrieving station, and at the same time transport the empty material frame after the material is retrieved to the unloading station for spacer paper recovery;

[0008] A lifting assembly is provided below the material taking station and is used to lift and position the material frame on the material taking station;

[0009] A material blocking assembly is provided on the conveying track. The material blocking assembly is provided between the loading station and the retrieving station, and between the retrieving station and the unloading station. The material blocking assembly is used to position the material frame;

[0010] A material unloading track is connected to the unloading station on the conveying track, and the material unloading track is used to transport and unload the material frame for recycling the separator paper;

[0011] A transfer track is provided below the conveying track, the transfer track includes a transfer frame, and transfer belt lines are provided on both sides of the transfer frame, and the transfer belt lines are used to transfer the material frame of the recycled separator paper to the unloading track;

[0012] Among them, the material receiving height of the unloading track is higher than the transmission height of the conveying track, and the transfer frame is driven and connected with the lifting component. The lifting component is used to drive the transfer belt line to rise and move the material frame on the conveying track to the same material receiving height as the unloading track to receive the material.

[0013] In one embodiment of the present invention, the jacking assembly includes a jacking frame, a driving component is provided on the jacking frame, the driving component is connected to the jacking plate, a guide rod is provided on the bottom surface of the jacking plate, the guide rod is passed through the guide sleeve of the jacking frame, and the jacking plate is provided with a positioning hole or positioning pin matching the material frame, and the driving component drives the jacking plate to lift the material frame to make it leave the conveying track.

[0014] In one embodiment of the present utility model, the driving component includes a driving motor, a driving frame is slidably provided on the jacking frame, the driving frame is connected to one end of the rack, the free end of the rack is connected to the jacking plate, and a driving gear is provided on the output shaft of the driving motor, and the driving gear is engaged with the rack.

[0015] In one embodiment of the present utility model, the material stopping assembly includes a material stopping rack, a material stopping cylinder is provided on the material stopping rack, the material stopping cylinder is drivingly connected to the material stopping block, a buffer block is provided on the material stopping block, and the material stopping cylinder drives the material stopping block to pass through the conveying track.

[0016] In one embodiment of the present utility model, the lifting component includes a lifting frame, a lifting cylinder is provided on the lifting frame, the lifting cylinder is connected to the lifting plate, the transfer track is provided on the lifting plate, and the lifting cylinder drives the transfer track on the lifting plate to lift and lower the position of the material frame.

[0017] In one embodiment of the present invention, the conveying track includes a conveying frame, conveying belt lines are arranged on both sides of the conveying frame, an avoidance groove is opened on the conveying frame, the transfer belt line is passed through the avoidance groove, and the lifting component drives the transfer belt line to extend out of the avoidance groove to lift the material frame.

[0018] In one embodiment of the present invention, a pushing rack and a positioning plate are respectively provided on both sides of the conveying rack, the pushing rack is arranged on the material picking station, and a pushing cylinder is provided on the pushing rack, the pushing cylinder is connected to the pushing block, and the pushing cylinder drives the pushing block to push the material frame to the positioning plate for pushing and positioning.

[0019] In one embodiment of the present invention, the material frame includes a support frame, support plates are provided at the four corners of the support frame, the support plates are L-shaped, a carrying plate for loading flexible board products is provided on the support frame, and carrying handles are provided on both sides of the support frame.

[0020] In one embodiment of the present invention, vertical rods are provided at the four corners of the bottom surface of the support plate, the vertical rods are connected to the support frame, a movable plate is provided on the support frame, guide holes matching the vertical rods are opened at the four corners of the movable plate, the vertical rods are passed through the guide holes, a spring is sleeved on the vertical rod, one end of the spring abuts against the support plate, and the other end abuts against the movable plate, and an opening matching the lifting plate is provided on the bottom surface of the support frame.

[0021] In one embodiment of the present invention, the unloading track includes a unloading rack, unloading belt lines are arranged on both sides of the unloading rack, a test rack is arranged on the unloading rack, and a test sensor for detecting the unloading frame is arranged on the test rack. A blocking cylinder is arranged at the discharge end of the unloading belt line, and the blocking cylinder is driven and connected to the blocking plate.

[0022] Beneficial effects of the utility model:

[0023] The utility model transmits the material frame loaded with the flexible board to the material picking station through the conveying track, and after the material blocking component positions the material frame, the jacking component lifts and positions the material frame on the material picking station to unload the flexible board, and at the same time, the separator paper between the two flexible boards is placed in the material frame of the unloading station. After the unloading of the flexible board is completed, the lifting component drives the transfer belt line to rise and moves the material frame on the conveying track to the same material receiving height as the unloading track, and the transfer belt line drives the material frame to be transferred to the unloading track, thereby completing the transmission and feeding of the FPC flexible board. The operator only needs to add the material frame loaded with the flexible board, which minimizes the operator's workload and work intensity, and facilitates the feeding of the flexible board and the recycling of the separator paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of an FPC feeding device of the present utility model.

[0025] Figure 2 It is a schematic diagram of a material frame of the present utility model.

[0026] Figure 3 It is a schematic diagram of the conveying track of the present utility model.

[0027] Figure 4 It is a schematic diagram of the jacking assembly of the present utility model.

[0028] Figure 5 It is a schematic diagram of the transfer track of the present utility model.

[0029] Explanation of the numbers in the figure: 1. Conveyor track; 11. Loading station; 12. Retrieving station; 13. Unloading station; 14. Conveyor frame; 15. Conveyor belt line; 16. Stopper assembly; 17. Stopper cylinder; 18. Stopper block; 19. Pusher cylinder; 191. Pusher block; 192. Positioning plate; 2. Material frame; 21. Support frame; 22. Support plate; 23. Loading plate; 24. Moving plate; 25. Vertical rod; 26. Spring; 27. Handle; 28. Opening; 3. Transfer track; 31. Transfer rack; 32. Transfer belt line; 33. Avoidance trough; 34. Lifting rack; 35. Lifting cylinder; 4. Unloading track; 41. Unloading rack; 42. Unloading belt line; 43. Test sensor; 44. Blocking cylinder; 45. Blocking plate; 5. Lifting assembly; 51. Lifting plate; 52. Positioning hole; 53. Guide rod; 54. Lifting rack; 55. Drive rack; 56. Drive motor; 57. Rack; 58. Gear. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0031] Reference Figure 1-5 As shown, an FPC feeding device includes:

[0032] Conveyor track 1, on which a loading station 11, a retrieving station 12 and an unloading station 13 are arranged;

[0033] The material frame 2 is arranged on the conveying track 1, and the conveying track 1 is used to transport the material frame 2 loaded with the flexible plate from the loading station 11 to the retrieving station 12, and at the same time transport the empty material frame 2 after the material is retrieved to the unloading station 13 for paper recovery;

[0034] A lifting assembly 5 is provided below the retrieving station 12 and is used to lift and position the material frame 2 on the retrieving station 12;

[0035] The material blocking assembly 16 is provided on the conveying track 1. The material blocking assembly 16 is provided between the loading station 11 and the retrieving station 12, and between the retrieving station 12 and the unloading station 13. The material blocking assembly 16 is used to block and position the material frame 2;

[0036] The unloading track 4 is connected to the unloading station 13 on the conveying track 1, and the unloading track 4 is used to transport and unload the material frame 2 for recycling the separator paper;

[0037] The transfer track 3 is provided below the conveying track 1. The transfer track 3 includes a transfer frame 31. Transfer belt lines 32 are provided on both sides of the transfer frame 31. The transfer belt lines 32 are used to transfer the material frame 2 for recycling the separator paper to the unloading track 4.

[0038] Among them, the material receiving height of the unloading track 4 is higher than the transmission height of the conveying track 1, and the transfer frame 31 is driven and connected to the lifting component, and the lifting component is used to drive the transfer belt line 32 to rise and move the material frame 2 on the conveying track 1 to the same material receiving height as the unloading track 4 to receive the material.

[0039] The utility model transmits the material frame 2 loaded with the flexible board to the material picking station 12 through the conveying track 1. After the material blocking component 16 blocks and positions the material frame 2, the jacking component 5 lifts and positions the material frame 2 on the material picking station 12 to unload the flexible board. At the same time, the spacer paper between the two flexible boards is placed in the material frame 2 of the unloading station 13. After the unloading of the flexible board is completed, the lifting component drives the transfer belt line 32 to rise and moves the material frame 2 on the conveying track 1 to the same material receiving height as the unloading track 4. The transfer belt line 32 drives the material frame 2 to be transferred to the unloading track 4, thereby completing the transmission and feeding of the FPC flexible board. The operator only needs to add the material frame 2 loaded with the flexible board, which minimizes the operator's workload and work intensity, and facilitates the feeding of the flexible board and the recycling of the spacer paper.

[0040] In one embodiment of the present utility model, the jacking assembly 5 includes a jacking frame 54, and a driving component is provided on the jacking frame 54, and the driving component is connected to the jacking plate 51. A guide rod 53 is provided on the bottom surface of the jacking plate 51, and the guide rod 53 is passed through the guide sleeve of the jacking frame 54. The jacking plate 51 is provided with a positioning hole 52 or a positioning pin matching the material frame 2. The driving component drives the jacking plate 51 to lift the material frame 2 to make it separate from the conveying track 1, prevent the material frame 2 from shaking, ensure the positioning accuracy, and have a good positioning effect, which is beneficial to the equipment of the subsequent material taking process.

[0041] In one embodiment of the present utility model, the driving component includes a driving motor 56, and a driving frame 55 is slidably provided on the jacking frame 54. The driving frame 55 is connected to one end of the rack 57, and the free end of the rack 57 is connected to the jacking plate 51. A driving gear 58 is provided on the output shaft of the driving motor 56, and the driving gear 58 is engaged with the rack 57. The driving motor 56 drives the driving gear 58 to rotate, thereby driving the jacking plate 51 connected to the rack 57 to move upward. The jacking plate 51 passes through the opening 28 under the guidance of the guide rod 53 and abuts against the movable plate 24. The driving gear 58 is engaged with the rack 57, which can stably lift the jacking plate 51 and realize self-locking to avoid the sudden fall of the jacking plate 51 and ensure the jacking stability.

[0042] In one embodiment of the present utility model, the material stopping assembly 16 includes a material stopping rack, on which a material stopping cylinder 17 is provided, the material stopping cylinder 17 is driven and connected to a material stopping block 18, a buffer block is provided on the material stopping block 18, and the material stopping cylinder 17 drives the material stopping block 18 to pass through the conveying track 1.

[0043] Specifically, the material blocking cylinder 17 drives the material blocking block 18 to pass through the conveying track 1 to block and position the material frame 2 on the material picking station 12, thereby achieving stable and efficient conveying and temporary storage, streamlining the material picking action process, greatly reducing the material picking and unloading time, and effectively improving production efficiency.

[0044] In one embodiment of the present utility model, the lifting component includes a lifting frame 34, a lifting cylinder 35 is provided on the lifting frame 34, the lifting cylinder 35 is connected to the lifting plate drive, the transfer track 3 is provided on the lifting plate, and the lifting cylinder 35 drives the transfer track 3 on the lifting plate to lift and lower the position of the material frame 2.

[0045] Specifically, the lifting cylinder 35 drives the transfer track 3 on the lifting plate to rise, and the transfer belt line 32 extends out of the avoidance groove 33, so that the empty material frame 2 of the unloading station 13 is dropped onto the transfer belt line 32. When the transfer belt line 32 rises and moves the material frame 2 on the conveying track 1 to the same material receiving height as the unloading track 4, the transfer belt line 32 transfers the material frame 2 loaded with separator paper to the unloading belt line 42, and adjusts it to the appropriate height of the unloading track 4 through the lifting cylinder 35, thereby reducing the distance between the material frame 2 and the unloading track 4, realizing the automated transmission of the material frame 2 and improving work efficiency.

[0046] In one embodiment of the present utility model, the conveying track 1 includes a conveying frame 14, and conveying belt lines 15 are arranged on both sides of the conveying frame 14. An avoidance groove 33 is opened on the conveying frame 14, and the transfer belt line 32 is passed through the avoidance groove 33. The lifting component drives the transfer belt line 32 to extend out of the avoidance groove 33 to lift the material frame 2.

[0047] Specifically, the lifting cylinder 35 drives the transfer track 3 on the lifting plate to rise, and the transfer belt line 32 extends out of the avoidance groove 33 to lift and transport it. After the aggregate frame 2 is completely transferred, the transfer belt line 32 returns to the avoidance groove 33, and the transfer track 3 can be moved to an avoidance position to avoid getting stuck and ensure the 90° transfer of the material frame 2.

[0048] In one embodiment of the present utility model, a pushing rack and a positioning plate 192 are respectively provided on both sides of the conveying rack 14, and the pushing rack is arranged on the material picking station 12. A pushing cylinder 19 is provided on the pushing rack, and the pushing cylinder 19 is driven and connected to the pushing block 191. The pushing cylinder 19 drives the pushing block 191 to push the material frame 2 to the positioning plate 192 for pushing and positioning.

[0049] Specifically, the driving motor 56 continues to drive the driving gear 58 to rotate so that the material frame 2 is separated from the conveyor belt line 15, and the pushing cylinder 19 drives the pushing block 191 to push the lifted material frame 2 to the positioning plate 192 for pushing and positioning, effectively avoiding shaking when the flexible plate is taking the material, making it easier for the manipulator and other material taking equipment to quickly clamp the product, play the role of quickly taking the material, and then transport it to the next process, thereby greatly improving the feeding efficiency of the flexible plate product.

[0050] In one embodiment of the present invention, the material frame 2 includes a support frame 21, and support plates 22 are provided at the four corners of the support frame 21. The support plate 22 is an L-shaped structure. A loading plate 23 for loading flexible board products is provided on the support frame 21, and carrying handles 27 are provided on both sides of the support frame 21.

[0051] Specifically, the L-shaped support plates 22 at the four corners of the support frame 21 can limit the four corners of the flexible board to prevent the flexible board product from shaking during the transmission of the material frame 2, thereby ensuring the stability of the flexible board transmission. The carrying handles 27 set on both sides of the support frame 21 can facilitate the transportation of the material frame 2 and improve the transmission efficiency of the material frame 2.

[0052] In one embodiment of the present utility model, vertical rods 25 are provided at the four corners of the bottom surface of the support plate 22, and the vertical rods 25 are connected to the support frame 21. A movable plate 24 is provided on the support frame 21, and guide holes matching the vertical rods 25 are opened at the four corners of the movable plate 24. The vertical rods 25 are passed through the guide holes, and a spring 26 is sleeved on the vertical rod 25. One end of the spring 26 abuts against the support plate 22, and the other end abuts against the movable plate 24. An opening 28 matching the lifting plate 51 is provided on the bottom surface of the support frame 21.

[0053] Specifically, the lifting plate 51 passes through the opening 28 under the guidance of the guide rod 53 and abuts against the movable plate 24 to lift the material frame 2. When the material picking equipment presses down on the flexible plate to pick up materials, the spring 26 between the movable plate 24 and the supporting plate 23 provides a certain buffer and support to ensure the accuracy of the material picking equipment in picking up and releasing materials, while avoiding damage to the flexible plate caused by the material picking equipment grabbing.

[0054] In one embodiment of the present invention, the unloading track 4 includes a unloading rack 41, unloading belt lines 42 are arranged on both sides of the unloading rack 41, a test rack is arranged on the unloading rack 41, and a test sensor 43 for detecting the unloading material frame 2 is arranged on the test rack, which can monitor the status of the material frame 2 on the unloading track 4 in real time to avoid excessive accumulation of material frames 2. A blocking cylinder 44 is provided at the discharge end of the unloading belt line 42, and the blocking cylinder 44 is driven and connected to the blocking plate 45.

[0055] Specifically, the transfer belt line 32 transfers the material frame 2 loaded with separator paper to the unloading belt line 42, the lifting cylinder 35 drives the transfer track 3 on the lifting plate to descend, and the transfer belt line 32 returns to the avoidance groove 33. The blocking cylinder 44 drives the blocking plate 45 to block the material frame 2 on the unloading track 4 for temporary storage, so that the material frame 2 can be quickly transferred. The unloading track 4 is set at right angles to the conveying track 1, which can reduce the occupied area and ensure the rapid transfer of the material frame 2.

[0056] Usage process

[0057] The material frame 2 loaded with the flexible plate is transported to the loading station 11 of the conveyor rail 1, and the conveyor belt line 15 moves the material frame 2 on the loading station 11 to the material taking station 12, and the blocking cylinder 17 drives the blocking block 18 to pass through the conveyor rail 1, and after the material frame 2 on the material taking station 12 is blocked and positioned, the driving motor 56 drives the driving gear 58 to rotate, thereby driving the jacking plate 51 connected to the rack 57 to move upward, and the jacking plate 51 passes through the opening 28 and abuts against the moving plate 24 under the guidance of the guide rod 53. The driving motor 56 continues to drive the driving gear 58 to rotate so that the material frame 2 is separated from the conveyor belt line 15, and the pushing cylinder 19 drives the pushing block 191 to push the lifted material frame 2 to the positioning plate 192 for pushing positioning. The material taking equipment takes the material of the flexible plate of the lifted material frame 2, and places the spacer paper between the two flexible plate products in the empty material frame 2 of the unloading station 13. The lifting cylinder 35 drives the transfer track 3 on the lifting plate to rise, and the transfer belt line 32 extends out of the avoidance groove 33, so that the empty material frame 2 of the unloading station 13 is dropped onto the transfer belt line 32. When the transfer belt line 32 rises and moves the material frame 2 on the conveyor track 1 to the same material receiving height as the unloading track 4, the transfer belt line 32 transfers the material frame 2 loaded with spacer paper to the unloading belt line 42, and the lifting cylinder 35 drives the transfer track 3 on the lifting plate to descend, and the transfer belt line 32 returns to the avoidance groove 33, and the blocking cylinder 44 drives the blocking plate 45 to temporarily block the material frame 2 on the unloading track 4, thereby completing the transmission and feeding of the FPC flexible board, facilitating the feeding of the flexible board and the recycling of the spacer paper.

[0058] The above-described embodiments are merely preferred embodiments for the purpose of fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

Claims

1. An FPC feeding device, characterized in that: include: Conveyor track, on which loading station, retrieving station and unloading station are set; The material frame is arranged on the conveying track, and the conveying track is used to transport the material frame loaded with the flexible plate from the loading station to the retrieving station, and at the same time transport the empty material frame after the material is retrieved to the unloading station for spacer paper recovery; A lifting assembly is provided below the material taking station and is used to lift and position the material frame on the material taking station; A material blocking assembly is provided on the conveying track. The material blocking assembly is provided between the loading station and the retrieving station, and between the retrieving station and the unloading station. The material blocking assembly is used to position the material frame; A material unloading track is connected to the unloading station on the conveying track, and the material unloading track is used to transport and unload the material frame for recycling the separator paper; A transfer track is provided below the conveying track, the transfer track includes a transfer frame, and transfer belt lines are provided on both sides of the transfer frame, and the transfer belt lines are used to transfer the material frame of the recycled separator paper to the unloading track; Among them, the material receiving height of the unloading track is higher than the transmission height of the conveying track, and the transfer frame is driven and connected with the lifting component. The lifting component is used to drive the transfer belt line to rise and move the material frame on the conveying track to the same material receiving height as the unloading track to receive the material.

2. The FPC feeding device according to claim 1, wherein: The jacking assembly includes a jacking frame, a driving component is provided on the jacking frame, and the driving component is connected to the jacking plate. A guide rod is provided on the bottom surface of the jacking plate, and the guide rod is passed through the guide sleeve of the jacking frame. The jacking plate is provided with a positioning hole or a positioning pin that matches the material frame. The driving component drives the jacking plate to lift the material frame to make it leave the conveying track.

3. The FPC feeding device according to claim 2, wherein: The driving component includes a driving motor. A driving frame is slidably provided on the lifting frame. The driving frame is connected to one end of the rack. The free end of the rack is connected to the lifting plate. A driving gear is provided on the output shaft of the driving motor. The driving gear is engaged with the rack.

4. The FPC feeding device according to claim 1, wherein: The material blocking assembly includes a material blocking rack, a material blocking cylinder is provided on the material blocking rack, the material blocking cylinder is drivingly connected to a material blocking block, a buffer block is provided on the material blocking block, and the material blocking cylinder drives the material blocking block to pass through the conveying track.

5. The FPC feeding device according to claim 1, wherein: The lifting component includes a lifting frame, a lifting cylinder is provided on the lifting frame, the lifting cylinder is connected to the lifting plate, the transfer track is provided on the lifting plate, and the lifting cylinder drives the transfer track on the lifting plate to lift and lower the position of the material frame.

6. The FPC feeding device according to claim 1, wherein: The conveying track includes a conveying frame, and conveying belt lines are arranged on both sides of the conveying frame. An avoidance groove is opened on the conveying frame, and the transfer belt line is passed through the avoidance groove. The lifting component drives the transfer belt line to extend out of the avoidance groove to lift the material frame.

7. The FPC feeding device according to claim 6, wherein: A pushing rack and a positioning plate are respectively provided on both sides of the conveying rack. The pushing rack is provided on the material picking station. A pushing cylinder is provided on the pushing rack. The pushing cylinder is driven and connected to the pushing block. The pushing cylinder drives the pushing block to push the material frame to the positioning plate for pushing and positioning.

8. The FPC feeding device according to claim 2, wherein: The material frame includes a support frame, and support plates are provided at the four corners of the support frame. The support plates are L-shaped. A loading plate for loading flexible board products is provided on the support frame, and carrying handles are provided on both sides of the support frame.

9. The FPC feeding device according to claim 8, wherein: Vertical rods are provided at the four corners of the bottom surface of the support plate, and the vertical rods are connected to the support frame. A movable plate is provided on the support frame, and guide holes matching the vertical rods are opened at the four corners of the movable plate. The vertical rods are passed through the guide holes, and a spring is sleeved on the vertical rod. One end of the spring abuts against the support plate, and the other end abuts against the movable plate. An opening matching the lifting plate is provided on the bottom surface of the support frame.

10. The FPC feeding device according to claim 1, wherein: The unloading track includes a unloading rack, unloading belt lines are arranged on both sides of the unloading rack, a test rack is arranged on the unloading rack, a test sensor for detecting the unloading frame is arranged on the test rack, and a blocking cylinder is arranged at the discharge end of the unloading belt line, and the blocking cylinder is driven and connected to the blocking plate.

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