Visual inspection equipment facilitating feeding and discharging

Abstract

The utility model discloses visual inspection equipment convenient for feeding and discharging. The visual inspection equipment comprises a skeleton frame and a base, a baffle is arranged on the base; a first-stage feeding part is arranged on the base; a secondary feeding part is arranged on the skeleton frame; the first-stage feeding part and the second-stage feeding part respectively comprise a roller conveying part and a reference part; the second-stage feeding part further comprises a lifting table used for arranging the roller conveying part. The reference part comprises a bottom plate, a cross rod connected to the bottom plate in a sliding mode, a plurality of stand columns arranged on the cross rod, a plurality of inserting holes formed in the bottom plate and an elastic pin connected to the cross rod in a sliding mode. And the elastic pin is selectively connected with any one of the insertion holes in an insertion manner. The operation space is increased, the device can also be used for positioning and adjusting the positions of raw materials, the positions of the stand columns can be rapidly slid and locked, adjustment can be conveniently conducted according to the specifications of the raw materials, and the device is suitable for feeding of a single pile or more than two piles of raw materials.

Description

Technical Field

[0001] This utility model belongs to the field of automation equipment technology, and in particular relates to a visual inspection device that facilitates loading and unloading of materials. Background Technology

[0002] In automated production lines, the feeding structure, as the starting point, directly impacts the efficiency and quality of the entire production process. Its fundamental requirement is the ability to quickly and accurately feed raw materials or semi-finished products into the production line. In traditional manual feeding processes, human factors can lead to errors such as improper material placement or incorrect test parameter settings. Automated feeding structures, through precise programming and control, can minimize these human errors, ensuring the stability and consistency of the production process. Modern automated production line feeding structures typically offer high flexibility, allowing for adjustments and optimization based on different production needs.

[0003] Chinese patent document CN219362420U discloses a PCB loading and inspection mechanism, belonging to the technical field of loading and inspection mechanisms. This mechanism includes a mounting frame and a lifting plate embedded in the mounting frame. The lifting plate has a groove at its top, and telescopic grooves are formed on both sides of the inner wall of the groove. An adjustable partition is embedded in the groove. The mounting frame has sliding grooves on its side walls, and threaded screws are symmetrically arranged in the mounting frame, threaded to the bottom of the partitions. A screw connected to the lifting plate is installed in the sliding groove. A telescopic plate is elastically arranged in the telescopic groove, and a mounting groove is formed at the top of the telescopic plate. Support blocks are equidistantly installed at the top of the mounting groove. This solution aims to solve the problem that existing PCB loading mechanisms have poor adaptability due to the varying sizes and shapes of PCBs and the fixed position of the partitions, making it impossible to disassemble and adjust the partitions to fit the PCB size.

[0004] However, the embedded mounting structure of the mounting rack in this solution makes it inconvenient for manual loading onto the lifting plate. If loading is done when the lifting plate is at the top, the placement of the stacked PCBs cannot be accurately positioned, and the relative positions of each PCB cannot be adjusted, which hinders the subsequent automated process. If loading is done when the lifting plate is at the bottom, manual operation is required to enter the mounting rack, which is inconvenient and has limited operating space, especially for larger PCBs, where the operation becomes even more difficult. Utility Model Content

[0005] To overcome the technical problem of inconvenient manual replenishment of raw materials in the hoppers of plate-shaped components due to their embedded installation structure, this utility model aims to provide a visual inspection device that facilitates loading and unloading. This device features a primary loading section for manual replenishment and a secondary loading section for conveying raw materials to the inspection equipment. The primary loading section has only columns and baffles at its upper end for positioning and aligning the raw materials, providing ample operating space. The columns can also be easily adjusted according to the type of raw material. After manual replenishment, the raw materials are conveyed by roller conveyors to the secondary loading section for subsequent automated processes.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a visual inspection device for easy loading and unloading, comprising a frame and a base disposed on the outside of the frame; a baffle is longitudinally disposed on the upper end of the base; a primary loading section is disposed on the upper end of the base between the baffle and the frame; a secondary loading section is disposed on the frame near the primary loading section; the primary loading section and the secondary loading section respectively include a roller conveying section and a reference section; the secondary loading section further includes a lifting platform longitudinally slidably connected to the frame, and the roller conveying section is disposed on the upper end of the lifting platform; the roller conveying section includes a plurality of horizontally arranged conveying rollers; wherein, the reference section includes a base plate, a horizontally slidably connected crossbar on the upper end of the base plate, a plurality of vertically arranged columns on the upper end of the crossbar, a plurality of insertion holes disposed on the base plate, and an elastic pin slidably connected to the crossbar; the columns extend upward from between two adjacent conveying rollers; the elastic pin can be selectively inserted into any of the insertion holes.

[0007] According to the specifications and dimensions of the raw materials, the elastic pins are adjusted to be inserted into the corresponding holes. When the raw materials are placed manually, they are aligned with the columns and the baffles at the same time, providing a large operating space and facilitating operation. Subsequently, the corresponding roller conveyor transports the placed raw materials to the secondary feeding section. The lifting platform pushes the raw materials upwards one by one, making it easy for the automated program to remove the raw materials from the secondary feeding section.

[0008] Furthermore, it includes a conveyor belt and a discharge section disposed on the frame; the discharge section and the secondary feeding section are respectively located at both ends of the conveyor belt; turnover sections for handling raw materials are respectively disposed between the discharge section and the conveyor belt, and between the secondary feeding section and the conveyor belt; a detection section is disposed in the middle of the conveyor belt.

[0009] Specifically, the detection unit includes a supplementary light cover disposed above the conveyor belt and two CCD cameras disposed above the supplementary light cover; a detection slit is provided at the upper end of the supplementary light cover; a light shield is slidably connected to the upper end of the supplementary light cover; the distance between the light shield and the inner wall of the detection slit can be adjusted; the CCD cameras are directly opposite the detection slit.

[0010] Specifically, the detection unit includes an inclined plate disposed on the skeleton frame and two U-shaped frames rotatably connected to the inclined plate; the CCD camera is rotatably connected inside the U-shaped frames; two first adjusting screws are threadedly connected to the inclined plate, the first adjusting screws abutting against the side wall of the U-shaped frame for driving the U-shaped frame to rotate; two bending plates are disposed on the U-shaped frame; a second adjusting screw is threadedly connected to the bending plate, the second adjusting screw abutting against the CCD camera for driving the CCD camera to rotate.

[0011] The amount of light transmitted through the detection slit can be adjusted by sliding the light-shielding plate to provide optimal visual conditions for the CCD camera. At the same time, the second and first adjustment screws can be rotated to fine-tune the angle of the CCD camera, ensuring the accuracy of the detection results and work efficiency. The adjustment is more accurate and convenient.

[0012] Furthermore, a first adjustment groove is horizontally arranged at the lower part of the baffle; two first sensors are slidably connected in the first adjustment groove; the first sensors are directly opposite the upper end of the adjacent conveying roller; the two first sensors are respectively located on both sides of the crossbar.

[0013] Furthermore, the secondary feeding section includes a mounting plate longitudinally arranged on the frame, a lead screw rotatably connected to the mounting plate and driven by the lifting platform, and a lifting motor arranged at the lower part of the mounting plate and driven by the lead screw; the mounting plate is arranged on the side of the secondary feeding section away from the primary feeding section; two second sensors are slidably connected to the upper end of the mounting plate; the second sensors are respectively located on both sides of the crossbar; the detection end of the second sensor is flush with the upper end of the conveyor belt.

[0014] Specifically, the secondary feeding section and the discharge section are located on the same side of the conveying direction of the conveyor belt; the discharge section includes a lifting platform and a roller conveying section identical to the secondary feeding section, as well as a third adjusting groove disposed on the side of the corresponding lifting platform away from the conveyor belt; a third sensor is slidably connected in the third adjusting groove, and the detection end of the third sensor faces the direction of the conveyor belt.

[0015] The crossbar has two sides for placing raw materials. The first, second, and third sensors monitor the material conveying process, allowing for manual control and judgment of the automated movement. The sensors can also be flexibly adjusted according to the specific specifications of the raw materials. The secondary feeding section and the discharge section are located on the same side and are linearly arranged, facilitating iterative upgrades to the existing linear conveyor belt with minimal modifications.

[0016] Furthermore, the turnover section includes a linear module disposed on the upper part of the frame, a telescopic cylinder disposed on the moving end of the linear module, a perforated plate disposed on the lower part of the moving end of the telescopic cylinder, and a plurality of pneumatic suction cups detachably connected to the lower end of the perforated plate; wherein, a pneumatic connector is disposed on the moving end of the telescopic cylinder; and a plurality of valves are disposed on the pneumatic connector, each communicating with a corresponding pneumatic suction cup.

[0017] Depending on the type and specifications of the raw materials, the positions of the pneumatic suction cups can be selected and distributed. The connection / operation status of the pneumatic suction cups can also be adjusted through the valves to improve compatibility.

[0018] Specifically, each end of the crossbar is provided with a slider; the elastic pin is provided on one of the sliders; the upper end of the base plate is provided with two rails that are slidably connected to the corresponding sliders; the upper end of the base plate is provided with at least one locking plate; and the insertion hole is provided on the locking plate.

[0019] Specifically, a baffle plate is provided between the detection section and the secondary feeding section; the upper end of the baffle plate is rotatably connected to the frame, and the lower end can be selectively pressed against the upper end of the conveyor belt; a motor that is drivenly connected to the baffle plate is provided on the frame.

[0020] The barrier plate can stop the raw materials on the conveyor belt, causing them to slide relative to the conveyor belt. This allows the raw materials to pass parallel to the barrier plate, and all raw materials pass through the detection unit in a uniform posture, which helps to improve the accuracy of the detection results.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up a primary feeding section, with only baffles and columns at the top, this utility model not only increases the operating space for manual replenishment of raw materials, but also allows for positioning and adjusting the position of raw materials, reducing the difficulty of manual operation; at the same time, the position of the columns can be quickly slid and locked, making it easy to adjust according to the specifications of the raw materials, and is suitable for feeding single stacks or two or more stacks of raw materials.

[0022] This invention features a high degree of automation, automatically picking up and arranging raw materials, and automatically visually inspecting the materials on the conveyor belt. The baffle plate makes fine adjustments to the materials on the conveyor belt, ensuring that the materials entering the inspection station have a uniform posture. The inspection speed is fast and the accuracy is high.

[0023] This invention is highly compatible with raw materials of different specifications. The arrangement of the suction cups and the feeding position of the raw materials can be easily adjusted according to the raw materials, which facilitates the subsequent implementation of automated processes. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the front structure of the present invention after removing the outer shell;

[0026] Figure 3 This is a schematic diagram of the back structure of the present invention after the outer shell has been removed;

[0027] Figure 4 This is a schematic diagram of the structure of the primary feeding section of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the secondary feeding section of this utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the reference part of this utility model;

[0030] Figure 7 This is a schematic diagram of the material discharge section of this utility model;

[0031] Figure 8 This is a schematic diagram of the inclined plate and U-shaped frame of this utility model;

[0032] Figure 9 This is a schematic diagram of the structure of the supplementary lighting cover of this utility model.

[0033] In the diagram: 1. Skeleton frame; 2. Conveyor belt; 3. Turnover section; 31. Linear module; 32. Telescopic cylinder; 33. Perforated plate; 34. Pneumatic connector; 4. Primary feeding section; 41. Base; 42. Baffle; 421. First adjusting groove; 43. First sensor; 5a. Secondary feeding section; 5b. Discharge section; 51. Mounting plate; 511. Serrated edge; 52. Lifting platform; 53. Second adjusting groove; 54. Second sensor; 55. Lead screw; 56. Optical axis; 57. Lifting motor; 58. Third sensor; 5 9. Third adjustment groove; 6. Detection section; 61. Supplemental light cover; 611. Detection seam; 62. CCD camera; 63. Light shield; 64. Inclined plate; 641. First adjustment screw threaded hole; 65. U-shaped frame; 651. Bending plate; 6511. Second adjustment screw threaded hole; 7. Roller conveyor section; 71. Conveyor roller; 72. Spacing seam; 8. Reference section; 81. Crossbar; 82. Column; 83. Slider; 84. Track; 85. Locking plate; 851. Insertion hole; 86. Elastic pin; 87. Base plate; 9. Barrier plate. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0035] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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. They should not be construed as limiting the specific protection scope of this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In this description of the utility model, "a number" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, terms such as "set" and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of 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] See Figures 1-9 A visual inspection device for easy loading and unloading includes a frame frame 1 and a base 41 disposed on the outside of the frame frame 1; a baffle 42 is longitudinally disposed on the upper end of the base 41; a primary loading section 4 is disposed on the upper end of the base 41 between the baffle 42 and the frame frame 1; a secondary loading section 5a is disposed on the frame frame 1 near the primary loading section 4. A conveyor belt 2 is horizontally disposed on the frame frame 1; the secondary loading section 5a is located at one end of the conveyor belt 2 near the base 41; a discharge section 5b is disposed on the frame frame 1 at the other end of the conveyor belt 2; turnover sections 3 for handling raw materials are respectively disposed between the discharge section 5b and the conveyor belt 2, and between the secondary loading section 5a and the conveyor belt 2; an inspection section 6 is disposed in the middle of the conveyor belt 2.

[0039] The primary feeding section 4 and the secondary feeding section 5a each include a roller conveyor section 7 and a reference section 8. The secondary feeding section 5a further includes a mounting plate 51 disposed on the frame 1, a lifting platform 52 longitudinally slidably connected to the mounting plate 51, a lead screw 55 rotatably connected to the mounting plate 51 and driven by the lifting platform 52, and a lifting motor 57 disposed at the lower part of the mounting plate 51 and driven by the lead screw 55. The mounting plate 51 is disposed on the side of the secondary feeding section 5a away from the primary feeding section 4. A serrated edge 511 is disposed between the mounting plate 51 and the lifting platform 52. Two optical shafts 56 are disposed on the mounting plate 51 and are slidably connected to the lifting platform 52 respectively.

[0040] The roller conveying section 7 includes a plurality of horizontally arranged conveying rollers 71; each conveying roller 71 has a gap 72 between it; the reference section 8 includes a base plate 87, a horizontally slidably connected crossbar 81 to the upper end of the base plate 87, and a plurality of longitudinally arranged columns 82 to the upper end of the crossbar 81; the columns 82 extend upward from the gap 72. A slider 83 is provided at both ends of the crossbar 81, and an elastic pin 86 is longitudinally slidably connected to one of the sliders 83; a spring is provided between the elastic pin and the corresponding slider 83, and the spring force is used to make the elastic pin 86 slide downward; two tracks 84 are provided at the upper end of the base plate 87, which are slidably connected to the corresponding sliders 83; a locking plate 85 is provided at the upper end of the base plate 87 directly below the elastic pin 86; the locking plate 85 is provided with a plurality of linearly and uniformly arranged insertion holes 851 along the sliding direction of the crossbar 81; the elastic pin 86 can be selectively inserted into any of the insertion holes 851.

[0041] The lower part of the baffle 42 is horizontally provided with a first adjusting groove 421; two first sensors 43 are slidably connected in the first adjusting groove 421; the first sensors 43 are directly opposite the upper end of the adjacent conveyor roller 71; the two first sensors 43 are respectively located on both sides of the crossbar 81. The upper end of the mounting plate 51 is slidably connected with two second sensors 54; the second sensors 54 are respectively located on both sides of the crossbar 81; the detection end of the second sensors 54 is flush with the upper end of the conveyor belt 2.

[0042] The upper end of the mounting plate 51 is provided with a second adjustment groove 53; the second sensor 54 is slidably connected in the second adjustment groove 53.

[0043] The secondary feeding section 5a and the discharge section 5b are located on the same side of the conveying direction of the conveyor belt 2. The discharge section 5b includes a lifting platform 52 and a roller conveying section 7, which are the same as those of the secondary feeding section 5a, and a third adjusting groove 59 disposed on the side of the corresponding lifting platform 52 away from the conveyor belt 2. A third sensor 58 is disposed in the third adjusting groove 59, and the detection end of the third sensor 58 faces the direction of the conveyor belt 2.

[0044] The detection unit 6 includes a supplementary light cover 61 disposed above the conveyor belt 2 and two CCD cameras 62 disposed above the supplementary light cover 61; a detection slit 611 is provided at the upper end of the supplementary light cover 61; a light shield 63 is slidably connected to the upper end of the supplementary light cover 61; the distance between the light shield 63 and the inner wall of the detection slit 611 can be adjusted; the CCD cameras 62 are directly opposite the detection slit 611.

[0045] The detection unit 6 includes an inclined plate 64 disposed on the skeleton frame 1 and two U-shaped frames 65 respectively rotatably connected to the inclined plate 64; the CCD camera 62 is rotatably connected inside the U-shaped frames 65; the inclined plate 64 is provided with two first adjusting screw thread holes 641; a first adjusting screw is threaded into the first adjusting screw thread hole 641, and the first adjusting screw abuts against the side wall of the U-shaped frame 65 to drive the U-shaped frame 65 to rotate; the U-shaped frame 65 is provided with two bending plates 651; the bending plate 651 is provided with a second adjusting screw thread hole 6511; a second adjusting screw is threaded into the second adjusting screw thread hole 6511, and the second adjusting screw abuts against the CCD camera 62 to drive the CCD camera 62 to rotate.

[0046] The turnover section 3 includes a linear module 31 disposed on the upper part of the frame 1, a telescopic cylinder 32 disposed on the moving end of the linear module 31, a perforated plate 33 disposed on the lower part of the moving end of the telescopic cylinder 32, and a plurality of pneumatic suction cups detachably connected to the lower end of the perforated plate 33; wherein, a pneumatic connector 34 is disposed on the moving end of the telescopic cylinder 32; and a plurality of valves are disposed on the pneumatic connector 34, which are respectively connected to the corresponding pneumatic suction cups.

[0047] A baffle plate 9 is provided between the detection unit 6 and the secondary feeding unit 5a; the upper end of the baffle plate 9 is rotatably connected to the skeleton frame 1, and the lower end can be selectively pressed against the upper end of the conveyor belt 2; a motor that is drivenly connected to the baffle plate 9 is provided on the skeleton frame 1.

[0048] Workflow: The operator, based on the specifications and size of the raw material (e.g., a PCB board), pulls up the elastic pin 86 to prevent it from contacting the insertion hole 851, then slides the crossbar 81 to the appropriate position, releasing the elastic pin 86 to allow it to insert into the insertion hole 851, locking the position of the crossbar 81. When the crossbar 81 slides to its extreme position on one side, a single large-area raw material can be placed on the primary feeding section 4; when the crossbar 81 slides to the middle position, two stacks of small-area raw materials can be placed on the primary feeding section 4; additionally, by sliding the crossbar 81, two stacks of raw materials of different specifications can be placed on the primary feeding section 4. During placement, the raw material is adjusted so that it simultaneously abuts against both the column 82 and the baffle 42, aligning the position of the raw material to facilitate subsequent automation and ensure motion accuracy.

[0049] The roller conveyor 7 on the primary feeding section 4 transports the raw material to the secondary feeding section 5a. The corresponding lifting platform 52 slides upward, aligning the uppermost raw material with the second sensor 54. The linear module 31 drives the telescopic cylinder 32 to move directly above the secondary feeding section 5a. The telescopic cylinder 32 slides downward, causing the pneumatic suction cup to pick up the raw material. Then, the telescopic cylinder 32 slides upward back to its original position. Driven by the linear module 31, the telescopic cylinder 32 moves to the upper end of the conveyor belt 2, where the pneumatic suction cup releases the raw material, allowing it to fall onto the conveyor belt 2. The lifting platform 52 continues to slide upward until the uppermost raw material is aligned with the second sensor 54.

[0050] The conveyor belt 2 drives the raw material to the inspection section 6. The baffle plate 9 rotates downward to stop the raw material and then rotates upward, so that the raw material passes under the supplementary light cover 61 in a uniform posture, parallel to the baffle plate 9, and is inspected by the inspection section 6. Finally, another turnover section 3 moves the inspected raw material to the discharge section 5b. The lifting platform 52 slides downward intermittently, and the raw materials are stacked together in sequence.

[0051] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A visual inspection apparatus facilitating feeding and discharging, characterized by: The application relates to a raw material feeding device, which comprises a skeleton frame and a base arranged outside the skeleton frame; a baffle is arranged on the upper end of the base in the longitudinal direction; a first-stage feeding part is arranged between the baffle and the skeleton frame on the upper end of the base; a second-stage feeding part is arranged on the skeleton frame close to the first-stage feeding part; the first-stage feeding part and the second-stage feeding part respectively comprise a roller conveying part and a reference part; the second-stage feeding part further comprises a lifting platform which is longitudinally and slidably connected to the skeleton frame, and the roller conveying part is arranged on the upper end of the lifting platform; the roller conveying part comprises a plurality of horizontally arranged conveying rollers; the reference part comprises a bottom plate, a horizontal rod which is horizontally and slidably connected to the upper end of the bottom plate, a plurality of vertical columns which are longitudinally arranged on the upper end of the horizontal rod, a plurality of insertion holes which are arranged on the bottom plate, and an elastic pin which is slidably connected to the horizontal rod; the vertical columns upwardly extend from between two adjacent conveying rollers; and the elastic pin is selectively inserted into any insertion hole.

2. The detection device of claim 1, wherein: The application further relates to a raw material feeding device, which comprises a conveying belt and a discharging part arranged on the skeleton frame; the discharging part and the second-stage feeding part are respectively arranged at two ends of the conveying belt; a turnover part for carrying raw materials is arranged between the discharging part and the conveying belt and between the second-stage feeding part and the conveying belt; and a detection part is arranged in the middle of the conveying belt.

3. The detection device of claim 2, wherein: The detection part comprises a light supplement lampshade arranged above the conveying belt and two CCD cameras arranged above the light supplement lampshade; a detection slot is arranged on the upper end of the light supplement lampshade; a light shielding plate is slidably connected to the upper end of the light supplement lampshade; the distance between the light shielding plate and the inner wall of the detection slot can be adjusted; and the CCD cameras are opposite to the detection slot.

4. The detection device of claim 3, wherein: The detection part comprises an inclined plate arranged on the skeleton frame and two U-shaped frames which are respectively rotationally connected to the inclined plate; the CCD cameras are rotationally connected to the U-shaped frames; two first adjusting screws are threadedly connected to the inclined plate and abut against the side walls of the U-shaped frames to drive the U-shaped frames to rotate; two bending plates are arranged on the U-shaped frames; second adjusting screws are threadedly connected to the bending plates and abut against the CCD cameras to drive the CCD cameras to rotate.

5. The detection device of any one of claims 1-4, wherein: A first adjusting groove is horizontally arranged on the lower part of the baffle; two first sensors are slidably connected in the first adjusting groove; the first sensors are opposite to the upper ends of the adjacent conveying rollers; and the two first sensors are respectively arranged on the two sides of the horizontal rod.

6. The detection device of any one of claims 2-4, wherein: The second-stage feeding part comprises a mounting plate which is longitudinally arranged on the skeleton frame, a lead screw which is rotationally connected to the mounting plate and is in transmission connection with the lifting platform, and a lifting motor which is arranged on the lower part of the mounting plate and is in transmission connection with the lead screw; the mounting plate is arranged on the side of the second-stage feeding part which is away from the first-stage feeding part; two second sensors are slidably connected to the upper end of the mounting plate; the second sensors are respectively arranged on the two sides of the horizontal rod; and the detection ends of the second sensors are flush with the upper end of the conveying belt.

7. The detection device of any one of claims 2-4, wherein: The secondary feeding part and the discharging part are located at the same side of the conveying direction of the conveying belt; the discharging part comprises the same lifting platform and roller conveying part as the secondary feeding part and a third adjusting groove arranged on the side of the corresponding lifting platform away from the conveying belt; a third sensor is slidably connected in the third adjusting groove, and the detection end of the third sensor faces the conveying belt direction.

8. The detection device of any one of claims 2-4, wherein: The turnover part comprises a linear module arranged on the upper part of the skeleton frame, a telescopic cylinder arranged on the moving end of the linear module, a multi-hole plate arranged on the lower part of the moving end of the telescopic cylinder, and a plurality of detachably connected pneumatic suction cups on the lower end of the multi-hole plate; wherein the moving end of the telescopic cylinder is provided with a pneumatic joint connector; the pneumatic joint connector is provided with a plurality of valves respectively communicating with the corresponding pneumatic suction cups.

9. The detection device of any one of claims 1-4, wherein: The two ends of the horizontal rod are respectively provided with sliding blocks; the elastic pin is arranged on one of the sliding blocks; the upper end of the bottom plate is provided with two rails respectively slidably connected with the corresponding sliding blocks; the upper end of the bottom plate is provided with at least one locking plate; the jack is arranged on the locking plate.

10. The detection device of any one of claims 2-4, wherein: A blocking plate is arranged between the detection part and the secondary feeding part; the upper end of the blocking plate is rotationally connected with the skeleton frame, and the lower end is selectively abutting against the upper end of the conveying belt; the skeleton frame is provided with a motor in transmission connection with the blocking plate.

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