A same-station feeding and discharging device of a plate cleaning equipment

Abstract

This utility model relates to the field of sheet metal loading and unloading technology, and discloses a same-station loading and unloading device for sheet metal cleaning equipment. It includes a base with an open top and a convex sheet metal. A connecting box is provided on the base, and a robotic arm for clamping and moving the convex sheet metal is mounted on the connecting box. The base has a discharge bin and a loading bin for storing the convex sheet metal, with the loading bin located near the connecting box. A support plate is provided inside the base, and a linear slide rail and a linear conveying mechanism are provided on the support plate. A transfer tray is provided on the linear conveying mechanism and slidably connected to the outside of the linear slide rail. Two sensors are provided on the support plate, and a sensing element is provided at the bottom of the transfer tray. The transfer tray is divided into a discharge placement section and a loading placement section, which correspond to the positions of the discharge bin and the loading bin, respectively. This utility model, by utilizing the fixed-point and reciprocating conveying of the same conveying mechanism, can save installation space for the loading and unloading device.

Description

Technical Field

[0001] This utility model relates to the field of sheet material loading and unloading technology, specifically to a same-station loading and unloading device for sheet material cleaning equipment. Background Technology

[0002] Reusable boards need to be cleaned after use. Existing cleaning equipment typically consists of a linear conveyor belt. The two ends of the conveyor belt are the loading and unloading devices, while the middle section is equipped with a device for cleaning the boards, thus realizing the functions of conveying, loading, unloading, and cleaning the boards.

[0003] Currently, a utility model patent with announcement number CN216500950U discloses a board cleaning device, including a PLC control unit. The PLC control unit is electrically connected to the cleaning device. The cleaning device includes a feeding control unit A, a loading control unit B, a cleaning host C, an empty tray control unit D, a discharge control unit F, and a discharge control unit E, which are arranged perpendicularly to the cleaning host C and are arranged in the same plane. It also includes a cleaning inlet roller, a first cleaning brush, a second cleaning brush, a third cleaning brush, and a cleaning outlet roller located at the intersection of the cleaning host C and the discharge control unit F. This device realizes automatic feeding and unloading, automatic cleaning, automatic unloading and unloading, and automatic discharge.

[0004] Existing loading and unloading devices require separate installations in practical applications, resulting in a large footprint. For indoor factories, especially compact ones, this significantly reduces walkways and hinders the movement of personnel and equipment, leading to low overall space utilization. To address these issues, this application provides a same-station loading and unloading device for a board washing machine. Utility Model Content

[0005] Based on the above description, this utility model provides a same-station loading and unloading device for a board cleaning equipment, in order to solve the problem that the existing board loading and unloading devices have a large actual floor area, resulting in low space utilization.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a loading and unloading device for a plate cleaning equipment, including a base with an open top and a convex plate, a connecting box on the base, and a mechanical arm on the connecting box for clamping and moving the convex plate. The base is provided with a feeding bin and a loading bin for storing convex plates. The loading bin is located on the side close to the connecting box. The base is provided with a support plate, and the support plate is provided with a linear slide rail and a linear conveying mechanism. The linear conveying mechanism is provided with a transplanting tray, which is slidably connected to the outside of the linear slide rail. The support plate is equipped with two sensors, and the bottom of the transplanting tray is equipped with a sensing element that is sensed by the sensors. The transplanting tray is divided into a feeding section and a feeding section, which correspond to the positions of the feeding bin and the feeding bin, respectively. The base is equipped with an upper lifting mechanism that lifts the convex plate upwards, and the upper lifting mechanism is located below the support plate.

[0007] Through the above technical solution, the linear conveying mechanism can drive the transplanting tray to move along the path of the linear slide rail; the unloading and loading parts can correspond to the positions of the unloading bin and the loading bin respectively, so that the boards to be cleaned and the cleaned boards can be unloaded and loaded respectively.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the bottom of the transplanting tray is provided with a sliding block, which is slidably connected to the outside of the linear slide rail; The transplanting tray has two placement slots for placing convex plates. The transplanting tray also has two sets of ejection holes and one lightweight hole. The ejection holes in the same set are connected to the interior of the corresponding placement slots. The lightweight hole is located on the side of the transplanting tray away from the linear conveying mechanism.

[0010] The above technical solution allows for the proper placement of convex plates via a placement groove, and the lightweight hole design reduces the weight of the transplanting tray.

[0011] Furthermore, a sinking groove is provided on the support plate, and the linear conveying mechanism includes two central shafts rotatably connected to the sinking groove via bearings. Synchronous pulleys are sleeved on the outer side of the central shafts, and a synchronous belt meshes between the outer sides of the two synchronous pulleys. The bottom of the support plate is equipped with a servo motor, and the output shaft of the servo motor passes through the bottom of the support plate and is fixed to the bottom end of one of the central shafts.

[0012] The above technical solution allows the central shaft and synchronous pulley to be properly positioned within the sinking trough, preventing physical interference; the servo motor can drive the corresponding central shaft to rotate.

[0013] Furthermore, the sensing element includes a shield that is detachably connected to the bottom of the transplanting tray, and a sensing groove is provided on the support plate for the shield to slide. The sensing sensor includes a photoelectric sensor disposed in the sensing groove, with two photoelectric sensors located on the left and right sides of the sensing groove, respectively.

[0014] The above technical solution, through the combination of the shielding plate and the photoelectric sensor, can achieve the effect of triggering sensing.

[0015] Furthermore, a clip is detachably connected between the bottom of the transplanting tray and the outer side of the timing belt; The shielding plate can be moved to the outside of the two photoelectric sensors respectively, and the sliding block is located at the central axis of the transplanting tray.

[0016] The above technical solution enables the synchronous belt to move synchronously, driving the transplanting tray to move synchronously; the blocking of the shielding plate can trigger the corresponding photoelectric sensor.

[0017] Furthermore, the upper lifting mechanism includes two fixed plates disposed within the base, with a hydraulic cylinder at the bottom of the fixed plate, the piston end of the hydraulic cylinder penetrating through the corresponding fixed plate and having a lifting plate. The lifting plate is equipped with a Z-shaped connecting frame on the outside, and each Z-shaped connecting frame is equipped with four bottom support columns.

[0018] Through the above technical solution, the hydraulic cylinder can drive the lifting plate to move with the corresponding Z-shaped connecting frame and the bottom support column.

[0019] Furthermore, the bottom of the lifting plate is provided with two guide rods, the fixing plate is provided with two through holes for the corresponding two guide rods to pass through, and the bottom of the fixing plate is provided with two linear bearings; Both ends of the linear bearing are open, and the linear bearing is connected to the interior of the corresponding through hole. The guide rod is slidably connected between the corresponding through hole and the inner side of the linear bearing.

[0020] The above technical solution achieves a sliding guiding effect through the cooperation of the guide rod and the linear bearing, making the movement smoother and more stable.

[0021] Furthermore, the support plate has connecting holes for the movement of eight bottom support columns. Each group of the ejector holes has four holes. The four ejector holes in the same group allow the corresponding four bottom support columns to pass through and move. The four ejector holes in the same group are located at the four corners of the corresponding placement slots.

[0022] The above technical solution enables the ejector hole to allow the bottom support column to move, thereby lifting the four corners of the convex plate placed in the placement groove through the corresponding four bottom support columns.

[0023] Furthermore, both the unloading hopper and the loading hopper are equipped with two automatically opening and closing limiting components. The two limiting components are symmetrically distributed and abut against the bottom of the first convex plate at the bottom.

[0024] The above technical solution uses an automatically opening and closing limiting device to limit the movement of convex plates in the unloading and loading hoppers.

[0025] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. By setting the loading and unloading stations on the same side and using the same conveying mechanism for fixed-point and reciprocating conveying, the boards to be cleaned and the cleaned boards can be moved normally into the corresponding silos for storage; this can save the installation space of the loading and unloading devices, allowing more usable space in small and medium-sized factories, facilitating the movement of personnel and vehicles, and improving space utilization. 2. Through the sensing and coordination of sensors, the linear conveyor mechanism can drive the transplanting tray to move along the specified path, thereby meeting the needs of picking up and placing boards at the same workstation; through the hydraulic cylinder and the bottom support column, the boards can be lifted upwards and placed into the corresponding hopper, or the boards can be moved out of the hopper, realizing the functions of loading and unloading to meet normal loading and unloading needs. Attached Figure Description

[0026] Figure 1 A schematic diagram of the overall structure of a same-station loading and unloading device for a board cleaning equipment provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the internal connection structure of the base in an embodiment of this utility model; Figure 3 This is an embodiment of the present utility model. Figure 2 Schematic diagram of the connection structure of the middle base; Figure 4 This is a schematic diagram of the connection structure of the transplanting tray in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the convex plate placed on the transplanting tray in an embodiment of the present invention; Figure 6 This is an embodiment of the present utility model. Figure 5 A schematic diagram showing the separation of the convex plate and the transplanting tray; Figure 7 This is a top view of the support plate connection structure in an embodiment of this utility model.

[0027] Reference numerals: 1. Base; 21. Connecting box; 22. Robotic arm; 23. Convex plate; 31. Feeding bin; 32. Loading bin; 4. Support plate; 51. Linear guide rail; 52. Sliding block; 53. Transplanting tray; 531. Placement groove; 532. Ejection hole; 533. Lightweight hole; 534. Unloading placement section; 535. Loading placement section; 54. Sinking groove; 55. Central shaft; 56. Synchronous pulley; 57. Synchronous belt; 58. Servo motor; 59. Clamping plate; 510. Shielding plate; 511. Photoelectric sensor; 61. Fixed plate; 62. Hydraulic cylinder; 63. Lifting plate; 64. Guide rod; 65. Z-shaped connecting frame; 66. Bottom support column. Detailed Implementation

[0028] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0030] Example: Reference Figure 1 and Figure 2 A loading and unloading device for a board cleaning equipment includes a base 1 with an open top and a convex board 23. A connecting box 21 is mounted on the base 1, and a robotic arm 22 is mounted on the connecting box 21 to clamp and move the convex board 23. The base 1 has a loading bin 31 for storing the convex board 23 and a loading bin 32, with the loading bin 32 located near the connecting box 21. A support plate 4 is located inside the base 1, and a linear slide rail 51 and a linear conveying mechanism are mounted on the support plate 4. The structure is provided with a transplanting tray 53, which is slidably connected to the outside of the linear slide rail 51; the support plate 4 is provided with two sensing sensors, and the bottom of the transplanting tray 53 is provided with a sensing element that is sensed by the sensing sensors. The transplanting tray 53 is divided into a material feeding part 534 and a material feeding part 535, which correspond to the positions of the material feeding bin 31 and the material feeding bin 32, respectively; the base 1 is provided with an upper lifting mechanism that lifts the convex plate 23 upward, and the upper lifting mechanism is located below the support plate 4.

[0031] It should be noted that the cleaning equipment can be set on one side of the base 1. The cleaning equipment includes a water storage tank and a rinsing pipe. The robotic arm 22 clamps the convex plate 23 placed on the transfer tray 53 and located in the unloading placement part 534 and moves it to the water storage tank for rinsing by the rinsing pipe. After rinsing, it is placed in the loading placement part 535 by the robotic arm 22.

[0032] refer to Figure 5 and Figure 6 The transplanting tray 53 has two placement slots 531 for placing the convex plate 23. The transplanting tray 53 also has two sets of ejection holes 532 and one lightweight hole 533. The ejection holes 532 in the same set are connected to the interior of the corresponding placement slots 531. The lightweight hole 533 is located on the side of the transplanting tray 53 away from the linear conveying mechanism. The convex plate 23 can be placed normally through the placement slots 531. The setting of the lightweight hole 533 can reduce the weight of the transplanting tray 53.

[0033] Specifically, when the transplanting tray 53 moves to the end of the linear slide rail 51, a portion of the side of the transplanting tray 53 with the lightweight hole 533 is in the air. The lightweight hole 533 reduces the load on that side, making it less likely for the structure to deform.

[0034] refer to Figure 2 and Figure 7 The support plate 4 has a recessed groove 54. The linear conveying mechanism includes two central shafts 55 rotatably connected to the recessed groove 54 via bearings. Synchronous pulleys 56 are sleeved on the outside of the central shafts 55, allowing the central shafts 55 and synchronous pulleys 56 to be properly arranged in the recessed groove 54 to prevent physical interference. A synchronous belt 57 meshes between the outer sides of the two synchronous pulleys 56. A servo motor 58 is provided at the bottom of the support plate 4. The output shaft of the servo motor 58 passes through the bottom of the support plate 4 and is fixed to the bottom end of one of the central shafts 55. The servo motor 58 can drive the corresponding central shaft 55 to rotate, thereby achieving the transmission effect through the transmission cooperation of the synchronous pulleys 56 and the synchronous belt 57.

[0035] refer to Figure 4 and Figure 7 The sensing element includes a shield 510 detachably connected to the bottom of the transplanting tray 53. The support plate 4 has a sensing groove for the shield 510 to slide, so that the shield 510 can move normally with the transplanting tray 53. The sensing sensor includes a photoelectric sensor 511 located in the sensing groove. The two photoelectric sensors 511 are located on the left and right sides of the sensing groove, respectively. The effect of triggering sensing can be achieved by the cooperation of the shield 510 and the photoelectric sensor 511.

[0036] It should be noted that the blocking plate 510 blocks the photoelectric sensor 511, interrupting the light emission path and triggering the sensor. Specifically, when the transplanting tray 53 is located at the beginning of the linear slide rail 51, the blocking plate 510 corresponds to the position of the photoelectric sensor 511 and blocks it. At this time, the unloading part 534 and the loading part 535 on the transplanting tray 53 correspond to the positions of the unloading bin 31 and the loading bin 32, respectively. When the transplanting tray 53 is located at the end of the linear slide rail 51, the blocking plate 510 corresponds to the position of the photoelectric sensor 511 and blocks it. At this time, the transplanting tray 53 is located outside the base 1 and below the robotic arm 22.

[0037] refer to Figure 3 and Figure 4The bottom of the transplanting tray 53 is provided with a sliding block 52, which is slidably connected to the outside of the linear slide rail 51. A clip 59 is detachably connected between the bottom of the transplanting tray 53 and the outside of the synchronous belt 57. The clip 59 allows the synchronous belt 57 to move, driving the transplanting tray 53 to move synchronously on the outside of the linear slide rail 51 via the sliding block 52. The blocking plate 510 can be moved to the outside of the two photoelectric sensors 511 respectively. The sliding block 52 is located at the central axis of the transplanting tray 53. The blocking of the blocking plate 510 can trigger the sensing of the corresponding photoelectric sensor 511.

[0038] refer to Figure 2 and Figure 3 The upper lifting mechanism includes two fixed plates 61 located inside the base 1. A hydraulic cylinder 62 is provided at the bottom of the fixed plate 61. The piston end of the hydraulic cylinder 62 passes through the corresponding fixed plate 61 and is provided with a lifting plate 63. A Z-shaped connecting frame 65 is provided on the outside of the lifting plate 63. Each Z-shaped connecting frame 65 is provided with four bottom support columns 66. The lifting plate 63 can be moved by the hydraulic cylinder 62, along with the corresponding Z-shaped connecting frame 65 and bottom support columns 66.

[0039] refer to Figure 2 and Figure 3 The bottom of the lifting plate 63 is provided with two guide rods 64. The fixed plate 61 has two through holes for the corresponding two guide rods 64 to pass through. The bottom of the fixed plate 61 is provided with two linear bearings. Both ends of the linear bearings are open. The linear bearings are connected to the inside of the corresponding through holes. The guide rods 64 are slidably connected between the corresponding through holes and the inside of the linear bearings. The cooperation between the guide rods 64 and the linear bearings can achieve the effect of sliding guidance, making the movement smoother and more stable.

[0040] refer to Figure 6 and Figure 7 The support plate 4 has connecting holes for eight bottom support columns 66 to move. Each group of four ejector holes 532 allows the corresponding four bottom support columns 66 to pass through and move. The four ejector holes 532 are located at the four corners of the corresponding placement groove 531, so that the ejector holes 532 can allow the bottom support columns 66 to move, and then the corresponding four bottom support columns 66 can lift the four corners of the convex plate 23 placed in the placement groove 531.

[0041] In use, the transplanting tray 53 is first moved to the bottom between the unloading bin 31 and the loading bin 32. The corresponding hydraulic cylinder 62 drives the lifting plate 63 upwards, allowing the bottom support column 66 to abut against the bottom of the first convex plate 23 in the unloading bin 31. The limiting device is then released, allowing the convex plate 23 in the unloading bin 31 to move, and the bottom support column 66 supports the convex plate 23 as it moves downwards. After moving the height of one convex plate 23, the limiting device re-limits, preventing the remaining convex plates 23 in the unloading bin 31 from falling further. The bottom support column 66 then places the convex plates 23 into the loading / unloading placement section 534 of the transplanting tray 53. The servo motor 58 is then started, driving the transplanting tray 53 to move via the synchronous wheel 56 and synchronous belt 57, moving the transplanting tray 53 to the end of the linear guide rail 51, allowing the robotic arm to... The robotic arm 22 can clamp the convex plate 23 in the unloading placement section 534 and move it to the cleaning equipment for cleaning. During the cleaning waiting process, the servo motor 58 drives the transfer tray 53 to move back, so that the loading placement section 535 can move to the position of the unloading placement section 534 mentioned above. After cleaning, the convex plate 23 is directly placed in the loading placement section 535 by the robotic arm 22. The transfer tray 53 moves between the bottom of the unloading bin 31 and the loading bin 32. The hydraulic cylinder 62 located below the loading bin 32 drives the bottom support column 66 to lift the cleaned convex plate 23 upward. After triggering the sensing of the limit member, the limit member is released, so that the convex plate 23 can be moved into the loading bin 32 for placement. At this time, the convex plate 23 in the unloading bin 31 falls according to the above principle, thus completing the loading and unloading work of the same station.

[0042] refer to Figure 1 and Figure 2 Both the unloading bin 31 and the loading bin 32 are equipped with two automatically opening and closing limiting components. The two limiting components are symmetrically distributed and abut against the bottom of the first convex plate 23. The automatically opening and closing limiting components can limit the convex plate 23 in the unloading bin 31 and the loading bin 32.

[0043] It should be noted that the limiting component includes a cylinder, a limiting block, and an infrared sensor. The piston end of the cylinder is connected to the limiting block. The four infrared sensors are respectively located on both sides of the unloading bin 31 and the loading bin 32. The limiting block abuts against the bottom of the first convex plate 23 at the bottom. The limiting component can also be other limiting structures with the same function, as long as they can meet the requirements of supporting the convex plate 23.

[0044] It should also be noted that, since the outer side of the convex plate 23 is convex and the bottom area of ​​the convex plate 23 is larger than the top area, there will be a "step" between the two convex plates 23 that are attached, which allows the limiting block to be inserted.

[0045] In use, the support column 66 lifts the convex plate 23 upwards, blocking the two corresponding infrared sensors and triggering them. The cylinder moves the limit block away from the convex plate 23, and the support column 66 continues to move the convex plate 23 upwards, allowing it to pass the infrared sensors. The cylinder then drives the limit block back to its original position, allowing for continued limit lifting. During unloading, the hydraulic cylinder 62 drives the support column 66 to move. When the hydraulic cylinder 62 reaches the preset stroke, the support column 66 abuts against the bottom of the convex plate 23 and moves it upwards. The cylinder moves the limit block away from the convex plate 23, and the support column 66 moves the convex plate 23 downwards, triggering the infrared sensors. The cylinder then drives the limit block back to its original position, continuing to limit and lift the remaining convex plate 23, thus achieving the automatic opening and closing limit effect.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A loading and unloading device for a board cleaning equipment, comprising a base (1) with an open top and a convex board (23), wherein a connecting box (21) is provided on the base (1) and a mechanical arm (22) for clamping and moving the convex board (23) is provided on the connecting box (21). Its features are, The base (1) is provided with a feeding bin (31) for storing convex plates (23) and a feeding bin (32). The feeding bin (32) is located on the side close to the connecting box (21). The base (1) is provided with a support plate (4). The support plate (4) is provided with a linear slide rail (51) and a linear conveying mechanism. The linear conveying mechanism is provided with a transplanting tray (53). The transplanting tray (53) is slidably connected to the outside of the linear slide rail (51). The support plate (4) is provided with two sensing sensors, and the bottom of the transplanting tray (53) is provided with a sensing element that is sensed by the sensing sensors. The transplanting tray (53) is divided into a feeding placement part (534) and a feeding placement part (535). The feeding placement part (534) and the feeding placement part (535) correspond to the positions of the feeding bin (31) and the feeding bin (32), respectively. The base (1) is provided with an upper lifting mechanism that lifts the convex plate (23) upward. The upper lifting mechanism is located below the support plate (4).

2. The same-station loading and unloading device for a board cleaning equipment according to claim 1, characterized in that, The bottom of the transplanting tray (53) is provided with a sliding block (52), which is slidably connected to the outside of the linear slide rail (51); The transplanting tray (53) is provided with two placement slots (531) for placing the convex plate (23). The transplanting tray (53) is also provided with two sets of ejection holes (532) and one lightweight hole (533). The ejection holes (532) in the same set are connected to the interior of the corresponding placement slots (531). The lightweight hole (533) is located on the side of the transplanting tray (53) away from the linear conveying mechanism.

3. The same-station loading and unloading device for a board cleaning equipment according to claim 2, characterized in that, The support plate (4) is provided with a sinking groove (54), and the linear conveying mechanism includes two central shafts (55) rotatably connected to the sinking groove (54) through bearings. Synchronous pulleys (56) are sleeved on the outside of the central shafts (55), and a synchronous belt (57) meshes between the outer sides of the two synchronous pulleys (56). The bottom of the support plate (4) is provided with a servo motor (58), and the output shaft of the servo motor (58) passes through the bottom of the support plate (4) and is fixed to the bottom end of one of the central shafts (55).

4. The same-station loading and unloading device for a board cleaning equipment according to claim 3, characterized in that, The sensing element includes a shield (510) detachably connected to the bottom of the transplanting tray (53), and a sensing groove for sliding the shield (510) is provided on the support plate (4). The sensing sensor includes a photoelectric sensor (511) disposed in the sensing groove, with two photoelectric sensors (511) located on the left and right sides of the sensing groove, respectively.

5. The same-station loading and unloading device for a board cleaning equipment according to claim 4, characterized in that, A clip (59) is detachably connected between the bottom of the transplanting tray (53) and the outer side of the timing belt (57); The shielding plate (510) can be moved to the outside of the two photoelectric sensors (511) respectively, and the sliding block (52) is located at the central axis of the transplanting tray (53).

6. The same-station loading and unloading device for a board cleaning equipment according to claim 2, characterized in that, The upper lifting mechanism includes two fixed plates (61) located in the base (1). The bottom of the fixed plate (61) is provided with a hydraulic cylinder (62). The piston end of the hydraulic cylinder (62) passes through the corresponding fixed plate (61) and is provided with a lifting plate (63). The lifting plate (63) is provided with a Z-shaped connecting frame (65) on the outside, and each Z-shaped connecting frame (65) is provided with four bottom support columns (66).

7. The same-station loading and unloading device for a board cleaning equipment according to claim 6, characterized in that, The bottom of the lifting plate (63) is provided with two guide rods (64), and the fixing plate (61) is provided with two through holes for the corresponding two guide rods (64) to pass through. The bottom of the fixing plate (61) is provided with two linear bearings. Both ends of the linear bearing are open, and the linear bearing is connected to the interior of the corresponding through hole. The guide rod (64) is slidably connected between the corresponding through hole and the inner side of the linear bearing.

8. The same-station loading and unloading device for a board cleaning equipment according to claim 6, characterized in that, The support plate (4) has connecting holes for the movement of eight bottom support columns (66). Each group of the ejector holes (532) has four holes. The four ejector holes (532) in the same group are respectively for the four bottom support columns (66) to pass through and move. The four ejector holes (532) in the same group are respectively located at the four corners of the corresponding placement slots (531).

9. A loading and unloading device for a board cleaning equipment according to any one of claims 1-8, characterized in that, Both the unloading bin (31) and the loading bin (32) are equipped with two limiters that can open and close automatically. The two limiters are symmetrically distributed and abut against the bottom of the first convex plate (23).

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