Tray lifting and stacking mechanism and appearance inspection apparatus

Abstract

This utility model belongs to the field of pallet conveying technology and discloses a pallet lifting and stacking mechanism and an appearance inspection device. The pallet lifting and stacking mechanism includes a conveying component, a supporting component, and a lifting component. The conveying plate can move along a first direction and pass through a picking station and a stacking station. The conveying plate has a clearance hole and can carry the pallet. A first claw and a second claw are located at the stacking station and are spaced apart from the conveying plate to avoid the pallet moving along the first direction. The lifting component is located at the stacking station and at the bottom of the supporting component and the conveying plate. The supporting plate can move along a vertical direction and pass through the clearance hole to abut or dismount from the pallet and drive the pallet to move along a vertical direction. The first claw and the second claw are spaced apart along a second direction and can move in directions that are closer to or further away from each other to support or release the pallet. The first direction, the second direction, and the vertical direction are perpendicular to each other.

Description

Technical Field

[0001] This utility model relates to the field of pallet conveying technology, and in particular to a pallet lifting and stacking mechanism and appearance inspection equipment. Background Technology

[0002] In industrial applications of appearance inspection equipment, a common approach to achieve efficient workpiece transfer and inspection is to place the workpiece in a pallet and then precisely transport the pallet to the vision inspection station via a conveyor system. At the inspection station, a robotic arm or automated pick-up device removes the workpiece from the pallet and places it on the inspection platform for automated inspection of appearance indicators such as surface defects, color deviations, and dimensional accuracy. After completion, the workpiece is returned to the pallet for the next process. This method effectively prevents surface damage to precision workpieces (such as electronic components and automotive parts) caused by vibration and collisions during transport, thus ensuring inspection accuracy. Simultaneously, the standardized positioning design of the pallet ensures consistent workpiece positioning within the inspection field of view, facilitating image acquisition and data comparison by the vision system.

[0003] However, this technology currently has a significant drawback in practical operation: it requires continuous manual operation of adding full pallets and picking up empty pallets. During production, as workpieces are continuously removed from pallets, full pallets gradually become empty. To ensure production continuity, workers need to constantly monitor the pallet status, adding full pallets to the conveyor equipment in a timely manner and picking up empty pallets from the conveyor equipment and collecting them. This manual operation method not only increases the labor intensity of workers, requiring them to frequently perform repetitive tasks such as handling and loading / unloading, consuming significant manpower and time costs, but also easily leads to production interruptions due to untimely manual operation. For example, if full pallets are not added in time, there may be no pallets available on the conveyor equipment, causing subsequent workstations to stop due to a lack of pallets; if empty pallets are not picked up in time, they will accumulate on the conveyor equipment, affecting its normal operation and disrupting the entire production process. Utility Model Content

[0004] The purpose of this utility model is to provide a pallet lifting and stacking mechanism and appearance inspection equipment to solve the problem that in the prior art, manual operation of adding full pallets and picking up empty pallets increases the labor intensity of workers, consumes a lot of manpower and time costs, and is prone to production interruption due to untimely manual operation. This invention reduces production costs and improves the continuity of production rhythm and production efficiency.

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

[0006] On the one hand, a pallet lifting and stacking mechanism is provided, comprising:

[0007] A conveying assembly, comprising a conveying plate that is movable along a first direction and passes through a picking station and a stacking station, the conveying plate having clearance holes and being able to carry a pallet;

[0008] The support assembly includes a first claw and a second claw, the first claw and the second claw being located at the stacking station and spaced apart from the conveyor plate to prevent the pallet from moving along the first direction;

[0009] A lifting assembly is provided at the stacking station and located at the bottom of the support assembly and the conveyor plate. The lifting assembly includes a support plate that can move vertically and pass through the clearance hole to abut or dismount from the pallet and drive the pallet to move vertically. The first claw and the second claw are spaced apart along a second direction and can move toward or away from each other to support or release the pallet. The first direction, the second direction, and the vertical direction are perpendicular to each other.

[0010] As an optional technical solution for pallet lifting and stacking mechanism, multiple supporting components and stacking stations are arranged at intervals along a first direction, and the supporting components are used to support the pallets or other materials in different states.

[0011] As an optional technical solution for the pallet lifting and stacking mechanism, the pallet lifting and stacking mechanism further includes a support assembly. The support assembly includes a first support plate and a second support plate, which are spaced apart along the vertical direction. The second support plate has a first through hole. The lifting assembly also includes a first driving member and a connecting rod. The first driving member is fixed to the first support plate. One end of the connecting rod is connected to the driving end of the first driving member, and the other end passes through the first through hole and is connected to the bearing plate. The connecting rod is slidably engaged with the first through hole.

[0012] As an optional technical solution for pallet lifting and stacking mechanism, the bearing plate is provided with two spaced apart along the second direction, the clearance hole corresponds to the bearing plate one by one, there are multiple connecting rods, the first through hole corresponds to the connecting rod one by one, the lifting assembly also includes a connecting plate, the connecting plate is provided at the driving end of the first driving member, and one end of all the connecting rods is connected to the connecting plate.

[0013] As an optional technical solution for the pallet lifting and stacking mechanism, the support assembly further includes a first support frame, which consists of two frames spaced apart along the second direction on the side of the second support plate away from the first support plate. The support assembly further includes two second driving members, which are respectively disposed on the two first support frames to drive the first claw and the second claw respectively.

[0014] As an optional technical solution for pallet lifting and stacking mechanism, the conveying assembly further includes a conveying guide rail that extends along the first direction, and a slider is provided at the bottom of the conveying plate, the slider slidingly engaging with the conveying guide rail.

[0015] As an optional technical solution for pallet lifting and stacking mechanism, the conveying assembly further includes a third driving member, which is disposed at the end of the conveying guide rail to drive the slider to move along the first direction.

[0016] As an optional technical solution for pallet lifting and stacking mechanism, the conveying component also includes a detection element, which is located at the picking station and is communicatively connected to the third drive element.

[0017] As an optional technical solution for the pallet lifting and stacking mechanism, the pallet lifting and stacking mechanism further includes a limiting component located at the stacking station. The limiting component includes multiple first limiting plates extending along the vertical direction and multiple second limiting plates extending along the vertical direction. The first limiting plates and the second limiting plates correspond one-to-one and are perpendicular to each other, so as to abut against multiple side walls of the pallet.

[0018] On the other hand, an appearance inspection device is provided, including a pallet lifting and stacking mechanism.

[0019] The beneficial effects of this utility model are:

[0020] This application discloses a pallet lifting and stacking mechanism and an appearance inspection device. The pallet lifting and stacking mechanism includes a conveying component, a supporting component, and a lifting component. The conveying component includes a conveying plate that can move along a first direction and pass through a picking station and a stacking station. The conveying plate has clearance holes and can support the pallet. The supporting component includes a first claw and a second claw, which are located at the stacking station and spaced apart from the conveying plate to prevent the pallet from moving along the first direction. The lifting component is located at the stacking station and at the bottom of the supporting component and the conveying plate. The lifting component includes a supporting plate that can move vertically and pass through the clearance holes to contact or disengage from the pallet and drive the pallet to move vertically. The first claw and the second claw are spaced apart along a second direction and can move towards or away from each other to support or release the pallet. The first direction, the second direction, and the vertical direction are perpendicular to each other.

[0021] The conveyor can transport empty or full pallets back and forth between the stacking station and the picking station. Empty pallets stacked at the stacking station can be picked up manually, or multiple full pallets can be stacked at the stacking station. This reduces the frequency of adding or picking up pallets, reduces production costs, and improves the continuity of production rhythm and production efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is an isometric drawing of the pallet lifting and stacking mechanism provided in this embodiment of the utility model;

[0024] Figure 2 This is one of the partial structural schematic diagrams of the pallet lifting and stacking mechanism provided in this embodiment of the utility model;

[0025] Figure 3 This is the second partial structural schematic diagram of the pallet lifting and stacking mechanism provided in this embodiment of the utility model;

[0026] Figure 4 This is the third partial structural schematic diagram of the pallet lifting and stacking mechanism provided in this embodiment of the utility model;

[0027] Figure 5 This is the fourth partial structural schematic diagram of the pallet lifting and stacking mechanism provided in this embodiment of the utility model;

[0028] Figure 6 This is the fifth partial structural schematic diagram of the pallet lifting and stacking mechanism provided in this embodiment of the utility model.

[0029] In the picture:

[0030] 1. Pallet;

[0031] 10. Conveying assembly; 11. Conveying plate; 111. Clearance hole; 112. Slider; 12. Conveying guide rail; 13. Adsorption component; 14. Detection component; 15. Vacuum pump; 16. Support block; 17. Second support frame;

[0032] 20. Support component; 21. First support claw; 22. Second support claw; 23. Second drive component;

[0033] 30. Lifting assembly; 31. Bearing plate; 32. First driving component; 33. Connecting rod; 34. Connecting plate; 35. Limiting post;

[0034] 40. Support assembly; 41. First support plate; 42. Second support plate; 43. First support frame; 431. Horizontal bar; 432. Vertical bar; 44. Support rod;

[0035] 50. Limiting component; 51. First limiting plate; 52. Second limiting plate. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

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

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

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

[0040] In existing technologies, as workpieces are continuously removed from pallets, full pallets gradually become empty. To ensure production continuity, workers need to constantly monitor the pallet status, promptly adding full pallets to the conveyor and simultaneously picking up and collecting empty pallets. This manual operation not only increases the labor intensity of workers, requiring them to frequently perform repetitive tasks such as handling and loading / unloading, consuming significant manpower and time costs, but also easily leads to production interruptions due to untimely manual operations. For example, if full pallets are not added in time, there may be no pallets available on the conveyor, causing subsequent workstations to stop due to a lack of pallets; if empty pallets are not picked up in time, they will accumulate on the conveyor, affecting its normal operation and disrupting the entire production process.

[0041] To address the aforementioned problems, this embodiment provides an appearance inspection device, including a pallet lifting and stacking mechanism. (See reference...) Figure 1 , Figure 5 ,and Figure 6 The pallet lifting and stacking mechanism includes a conveying component 10, a supporting component 20, and a lifting component 30.

[0042] Furthermore, the conveying assembly 10 includes a conveying plate 11, which is movable along a first direction and passes through a picking station and a stacking station. The conveying plate 11 has clearance holes 111 and is capable of carrying the pallet 1. In this embodiment, multiple stacking stations can be spaced apart along the first direction. The conveying plate 11 can convey the pallet 1 from one stacking station to a picking station, and can also convey the pallet 1 from a picking station to another stacking station. Specifically, see [reference needed]. Figure 2 and Figure 3 The conveying assembly 10 also includes multiple adsorption elements 13 spaced apart on the conveying plate 11 to adsorb and fix the tray 1. In this embodiment, the adsorption element 13 is a suction nozzle. The conveying assembly 10 also includes a vacuum pump 15. Mounting holes are provided on the conveying plate 11, and the suction nozzle is fixed within the mounting holes. The vacuum pump 15 is located at the bottom of the conveying plate 11 and connected to the suction nozzle, providing adsorption force to the suction nozzle. In other embodiments, the adsorption element 13 can also be a silicone disc with a concave center. When the tray 1 is placed on the disc, it compresses the space in the concave area and is adsorbed. In this embodiment, the adsorption elements 13 are arranged in an array with uniform spacing to ensure uniform force on all positions of the tray 1. In this embodiment, four adsorption elements 13 are provided.

[0043] Furthermore, the conveying assembly 10 also includes a support block 16, which is disposed on the conveying plate 11 and has the same height as the adsorption member 13, so as to support the position of the tray 1 that is not adsorbed and ensure the levelness of the tray 1.

[0044] In this embodiment, the conveying assembly 10 further includes a conveying guide rail 12 extending along a first direction. A slider 112 is provided at the bottom of the conveying plate 11, and the slider 112 slides in cooperation with the conveying guide rail 12. The conveying assembly 10 also includes a third driving member located at the end of the conveying guide rail 12 to drive the slider 112 to move along the first direction. Specifically, the third driving member can be a stepper motor, a cylinder, or a hydraulic cylinder. In other embodiments, a lead screw can be used instead of the conveying guide rail 12, a nut can be provided at the bottom of the conveying plate 11, and the third driving member can be a rotary motor to drive the conveying plate 11 to move along the first direction.

[0045] Furthermore, the conveying assembly 10 also includes a detection element 14, which is located at the picking station and communicatively connected to the third drive element. Specifically, the detection element 14 is configured as a distance sensor. When the conveyor plate 11 moves to the picking station or stacking station, the distance sensor can detect the change in distance between itself and the pallet 1 and send a signal to the third drive element, causing the third drive element to stop operating. In this embodiment, a second support frame 17 is provided at the end of the conveying guide rail 12 near the picking station. The detection element 14 is fixed to the second support frame 17, which provides height support for the detection element 14, ensuring that the detection path of the detection element 14 is directly opposite the side wall of the pallet 1.

[0046] Further, the supporting component 20 includes a first claw 21 and a second claw 22, which are located at the stacking station and spaced apart from the conveyor plate 11 to prevent the pallet 1 from moving along the first direction. The lifting component 30 is located at the stacking station and at the bottom of the supporting component 20 and the conveyor plate 11. The lifting component 30 includes a support plate 31, which can move vertically and pass through the clearance hole 111 to abut or disengage from the pallet 1 and drive the pallet 1 to move vertically. The first claw 21 and the second claw 22 are spaced apart along the second direction and can move towards or away from each other to support or release the pallet 1. The first direction, the second direction, and the vertical direction are perpendicular to each other. In this embodiment, the first direction is the X-axis direction, and the second direction is the Y-axis direction. The conveyor plate 11 can transport empty or full pallets 1 back and forth between the stacking station and the picking station. Empty pallets 1 stacked at the stacking station can be picked up manually, or multiple full pallets 1 can be stacked at the stacking station. This reduces the frequency of adding or picking up pallets 1, reduces production costs, and improves the continuity of production rhythm and production efficiency.

[0047] Furthermore, multiple support components 20 and stacking stations are spaced apart along the first direction. The support components 20 are used to support the pallets 1 or other materials in different states. Taking two stacking stations and one picking station as an example, a worker stacks several full pallets 1 on the support components 20 at the first stacking station. The conveyor plate 11 moves to the first stacking station, and the support plate 31 rises vertically to its highest point. The first claw 21 and the second claw 22 move in a direction away from each other, releasing all the pallets 1. The support plate 31 descends vertically by the height of one pallet 1, and the first claw 21 and the second claw 22 move in a direction closer to each other, lifting the remaining pallets 1. At this time, the support plate 31 carries one pallet 1. The support plate 31 descends vertically through the clearance hole 111. At this time, the pallet 1 rests on the conveyor plate 11, and the conveyor plate 11 transports the pallet 1 to the picking station. After the workpiece is picked up, the conveyor plate 11 transports the empty pallet 1 to the second stacking station. The support plate 31 rises vertically to a height of one pallet 1 away from the bottom horizontal line of the first claw 21 and the second claw 22. The first claw 21 and the second claw 22 move away from each other. The support plate 31 rises vertically to the highest point. The first claw 21 and the second claw 22 move towards each other, lifting the pallet 1. The support plate 31 then descends vertically to the lowest point.

[0048] It should be noted that this embodiment only provides the structure. The movement and stopping of the conveyor plate 11, the first claw 21, the second claw 22 and the bearing plate 31 are CNC program settings in the prior art, and will not be described in detail here.

[0049] Specifically, the pallet lifting and stacking mechanism further includes a support assembly 40, which includes a first support plate 41 and a second support plate 42. The first support plate 41 and the second support plate 42 are spaced apart in a vertical direction. The second support plate 42 has a first through hole. The lifting assembly 30 also includes a first driving member 32 and a connecting rod 33. The first driving member 32 is fixed to the first support plate 41. One end of the connecting rod 33 is connected to the driving end of the first driving member 32, and the other end passes through the first through hole and connects to the bearing plate 31. The connecting rod 33 is slidably engaged with the first through hole. Specifically, the first driving member 32 can be configured as a stepper motor, a cylinder, or a hydraulic cylinder. Specifically, the conveying guide rail 12 is arranged along a first direction on the side of the second support plate 42 opposite to the first support plate 41.

[0050] Specifically, the support assembly 40 also includes support rods 44. The first support plate 41 and the second support plate 42 are both rectangular. There are four support rods 44, which are located at the four corners of the first support plate 41 and the second support plate 42 to connect the first support plate 41 and the second support plate 42.

[0051] In this embodiment, two support plates 31 are spaced apart along the second direction, with one-to-one clearance holes 111 corresponding to each support plate 31. Multiple connecting rods 33 are included, with one-to-one first through holes corresponding to each connecting rod 33. The lifting assembly 30 also includes a connecting plate 34, which is located at the driving end of the first driving member 32. One end of all connecting rods 33 is connected to the connecting plate 34. Specifically, the connecting rods 33 are cylindrical rods, and the support plates 31 are rectangular plates. Each support plate 31 is connected to two connecting rods 33 to improve the stability of the support plate 31. In other embodiments, the connecting rods 33 can be square rods to increase the connection area with the support plate 31 and further improve the stability of the support plate 31.

[0052] Furthermore, the lifting assembly 30 also includes limiting posts 35. There are multiple limiting posts 35, which are respectively arranged on the side of the first support plate 41 and the second support plate 42 that are close to each other. The connecting plate 34 can move to abut against the limiting posts 35 to rigidly limit the carrying plate 31 from reaching the highest and lowest points.

[0053] Further, see Figure 4 and Figure 5 The support assembly 40 further includes two first support frames 43, which are spaced apart along a second direction on the side of the second support plate 42 opposite to the first support plate 41. The support assembly 20 also includes two second driving members 23, which are respectively disposed on the two first support frames 43 to drive the first claw 21 and the second claw 22 respectively. Specifically, the second driving member 23 can be configured as an electric push rod, a cylinder, or a hydraulic cylinder. Specifically, the first support frame 43 includes a crossbar 431, which extends along a first direction, and the second driving member 23 is fixed to the crossbar 431. In this embodiment, the first claw 21 and the second claw 22 are both configured as L-shaped plates. The first connecting part of the L-shaped plate is connected to the second driving member 23, and the first connecting part and the second connecting part abut against the side wall and the bottom edge of the tray 1, respectively. Specifically, the bottom edge of the tray 1 is configured as a continuous concave-convex shape, and the second connecting part fits the shape of the bottom of the tray 1 to increase the contact area with the tray 1 and improve the stability of supporting the tray 1.

[0054] Furthermore, the first support frame 43 also includes two vertical rods 432, which are perpendicularly connected to the horizontal rod 431. The pallet lifting and stacking mechanism also includes a limiting component 50, which is located at the stacking station. The limiting component 50 includes multiple first limiting plates 51 extending vertically and multiple second limiting plates 52 extending vertically. The first limiting plates 51 and the second limiting plates 52 correspond one-to-one and are perpendicular to each other to abut against multiple side walls of the pallet 1. Specifically, the first limiting plates 51 are fixed to the vertical rods 432 by fasteners, and the second limiting plates 52 are fixed to the first limiting plates 51 by fasteners. In this embodiment, the pallet 1 is rectangular, and the limiting component 50 has four components that limit the four corners of the rectangle. In other embodiments, limiting rods can be used to replace the first limiting plates 51 and the second limiting plates 52.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pallet lift stack mechanism characterized by, include: The conveying assembly (10) includes a conveying plate (11), which is capable of moving along a first direction and passing through a picking station and a stacking station. The conveying plate (11) is provided with a clearance hole (111) and is capable of carrying a pallet (1). The support assembly (20) includes a first claw (21) and a second claw (22), the first claw (21) and the second claw (22) being located at the stacking station and spaced apart from the conveyor plate (11) to avoid the pallet (1) from moving along the first direction; A lifting assembly (30) is provided at the stacking station and located at the bottom of the support assembly (20) and the conveyor plate (11). The lifting assembly (30) includes a support plate (31). The support plate (31) can move vertically and pass through the clearance hole (111) to abut or disengage from the pallet (1) and drive the pallet (1) to move vertically. The first claw (21) and the second claw (22) are spaced apart along a second direction and can move in directions that are close to or far away from each other to support or release the pallet (1). The first direction, the second direction and the vertical direction are perpendicular to each other.

2. The tray lift stacker mechanism of claim 1, wherein, The supporting components (20) and the stacking stations are both provided in multiples at intervals along the first direction. The supporting components (20) are used to support the pallets (1) in different states.

3. The tray lift stacker mechanism of claim 1, wherein, The pallet lifting and stacking mechanism further includes a support assembly (40), which includes a first support plate (41) and a second support plate (42). The first support plate (41) and the second support plate (42) are spaced apart along the vertical direction. The second support plate (42) has a first through hole. The lifting assembly (30) further includes a first driving member (32) and a connecting rod (33). The first driving member (32) is fixed to the first support plate (41). One end of the connecting rod (33) is connected to the driving end of the first driving member (32), and the other end passes through the first through hole and is connected to the bearing plate (31). The connecting rod (33) slides with the first through hole.

4. The tray lift stacker mechanism of claim 3, wherein, Two bearing plates (31) are spaced apart along the second direction. The clearance holes (111) correspond one-to-one with the bearing plates (31). There are multiple connecting rods (33). The first through holes correspond one-to-one with the connecting rods (33). The lifting assembly (30) also includes a connecting plate (34). The connecting plate (34) is located at the driving end of the first driving member (32). One end of all the connecting rods (33) is connected to the connecting plate (34).

5. The tray lift stacker mechanism of claim 3, wherein, The support assembly (40) further includes a first support frame (43), which consists of two first support frames (43) spaced apart along the second direction on the side of the second support plate (42) away from the first support plate (41). The support assembly (20) further includes two second drive members (23), which are respectively disposed on the two first support frames (43) to drive the first claw (21) and the second claw (22) respectively.

6. The tray lift stacker mechanism of claim 1, wherein, The conveying assembly (10) further includes a conveying guide rail (12) which extends along the first direction. A slider (112) is provided at the bottom of the conveying plate (11), and the slider (112) slides in cooperation with the conveying guide rail (12).

7. The tray lift stacker mechanism of claim 6, wherein, The conveying assembly (10) further includes a third driving member, which is disposed at the end of the conveying guide rail (12) to drive the slider (112) to move along the first direction.

8. The tray lift stacker mechanism of claim 7, wherein, The conveying assembly (10) also includes a detection element (14), which is located at the picking station and is communicatively connected to the third drive element.

9. The tray lift stacker mechanism according to any one of claims 1-8, wherein, The pallet lifting and stacking mechanism also includes a limiting component (50), which is located at the stacking station. The limiting component (50) includes a plurality of first limiting plates (51) extending along the vertical direction and a plurality of second limiting plates (52) extending along the vertical direction. The first limiting plates (51) and the second limiting plates (52) correspond to each other and are perpendicular to each other, so as to abut against a plurality of side walls of the pallet (1).

10. An appearance inspection apparatus characterized by comprising: Includes the pallet lifting and stacking mechanism as described in any one of claims 1-9.

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