Circulation device

Abstract

The utility model discloses a circulation device which comprises a conveying line used for conveying material trays carrying materials to be detected and provided with detection stations; the jacking mechanism is arranged at the detection station and located below the conveying line, and the jacking mechanism is suitable for jacking the trays upwards to be away from the conveying line; the positioning mechanism is arranged at the detection station and located above the conveying line, the positioning mechanism is suitable for clamping the jacked material disc, and a circulation gap is formed between the material disc in the clamping state and the conveying line; wherein the number of the detection stations is at least two, the detection stations are sequentially arranged in the length direction of the conveying line, and the jacking mechanisms and the positioning mechanisms are in one-to-one correspondence with the detection stations. By the adoption of the structure, a plurality of detection stations can be arranged on the conveying line, the trays at the detection stations do not affect one another, and the material carrying efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board detection, and particularly relates to a transfer device. Background Art

[0002] Before leaving the factory, the circuit board needs to be transferred to the detection equipment for strict electrical tests to ensure its qualified delivery. In the prior art, a conveyor line is usually used to convey the tray carrying the circuit board to the detection station, and then a manipulator is used to sequentially carry the circuit boards in the tray at the detection station to the detection equipment for detection. In addition, in order to ensure the position accuracy of the tray at the detection station, the conveyor line usually sets a pressing structure and / or a blocking structure at the detection station to position the tray.

[0003] Limited by the structure of the conveyor line, the conveyor line usually has only one detection station. After the tray at the detection station is detected, the tray will flow out of the detection station along the conveyor line, and then the upstream tray will continue to flow into the detection station. During this process, the manipulator will stop working and wait until the tray is positioned at the detection station before it can work, resulting in very low efficiency.

[0004] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a transfer device, in which the manipulator can continuously carry out material handling operations.

[0006] The purpose of the utility model is realized by the following technical solutions: A transfer device, comprising:

[0007] A conveyor line for conveying a tray carrying the material to be detected, and provided with a detection station;

[0008] A jacking mechanism is arranged at the detection station and below the conveyor line, and the jacking mechanism is adapted to jack the tray upward away from the conveyor line;

[0009] A positioning mechanism is arranged at the detection station and above the conveyor line, and the positioning mechanism is adapted to clamp the jacked-up tray, and a circulation gap is formed between the clamped tray and the conveyor line;

[0010] Wherein, the number of the detection stations is at least two, and they are arranged in sequence along the length direction of the conveyor line, and the jacking mechanism and the positioning mechanism correspond to the detection stations one by one.

[0011] Further, the jacking mechanism includes:

[0012] A jacking plate adapted to support the tray;

[0013] A lifting drive member, which is in transmission connection with the lifting plate to drive the lifting plate to lift and lower;

[0014] A limiting structure, with a quantity of two, and is respectively arranged on both sides of the lifting plate in the length direction of the conveying line;

[0015] Wherein, a tray supported on the lifting plate is limited between the two limiting structures.

[0016] Further, the limiting structure includes:

[0017] A connecting plate, with one side connected to the bottom of the lifting plate and the other side extending out of the lifting plate along the length direction of the conveying line;

[0018] A limiting block, which is arranged on the other side of the connecting plate and is suitable for limiting the side of the connecting plate in the length direction of the conveying line;

[0019] Wherein, a recessed area is formed by the tray recessing inward from its bottom surface, and the recessed area covers the outside of the connecting plate.

[0020] Further, the positioning mechanism includes a first positioning component, and the first positioning component includes:

[0021] A mounting rack, which is connected to the conveying line;

[0022] A clamping structure, which is arranged on the mounting rack, and the quantity of the clamping structure is two, and they are arranged oppositely along the length direction of the conveying line;

[0023] Wherein, the clamping structure includes a clamping member and a clamping drive member in transmission connection with the clamping member. When the tray is in the lifted state, the two clamping members are suitable for moving towards or away from each other along the length direction of the conveying line under the drive of the clamping drive member to clamp or release the tray.

[0024] Further, the clamping member is recessed inward from its top surface to form a clamping groove, and the clamping groove is suitable for supporting and clamping the tray during the process of the clamping members moving towards each other.

[0025] Further, the clamping groove is an L-shaped groove, and one side of it in the length direction and width direction of the conveying line is an open side. The clamping groove includes a first side wall and a second side wall vertically connected to the first side wall;

[0026] The bottom walls of the two clamping grooves are suitable for cooperatively supporting the tray, the first side walls of the two clamping grooves are suitable for cooperatively clamping the sides of the tray in the length direction of the conveying line, and the second side walls of the two clamping grooves are suitable for cooperatively limiting the tray in the width direction of the conveying line.

[0027] Furthermore, the number of the first positioning components is two, and they are arranged on both sides of the conveyor line in the width direction, and the two first positioning components are suitable for cooperating in clamping the material tray.

[0028] Further, the positioning mechanism includes a second positioning component, and the second positioning component includes:

[0029] A positioning block, disposed on one of the mounting frames;

[0030] A push structure, disposed on another of the mounting frames;

[0031] Wherein, the pushing structure includes a pushing member and a pushing driving member transmission connected to the pushing member. When the material tray is in a lifted state, the pushing member is suitable for moving along the width direction of the conveyor line under the drive of the pushing driving member to push the material tray to the positioning block.

[0032] Further, the push-resistance structure comprises a push-resistance frame connected to the push-resistance driving member, and the push-resistance members are two in number and are arranged on both sides of the push-resistance frame in the length direction of the conveyor line;

[0033] The pushing members include a pushing portion and a guiding portion vertically connected to the pushing portion, the pushing portions of the two pushing members are suitable for cooperating with pushing the material tray on the sides of the width direction of the conveyor line, and the guiding portions of the two pushing members are suitable for cooperating with limiting the material tray in the length direction of the conveyor line.

[0034] Further, the tray comprises:

[0035] The tray body;

[0036] A flange, convexly arranged on the outer circumference of the tray body;

[0037] Wherein, the pushing member is suitable for pushing the tray body, and the clamping member is suitable for clamping the flange.

[0038] Compared with the prior art, the utility model has the following beneficial effects: the utility model arranges a lifting mechanism and a positioning mechanism at the detection station of the conveyor line. When the conveyor line transports the material tray to the detection station, the lifting mechanism can lift the material tray upward away from the conveyor line, and the positioning mechanism is suitable for clamping the lifted material tray. When the lifting mechanism is lowered and reset, the material tray located downstream can flow through the material tray in the clamped state under the drive of the conveyor line and reach another detection station. That is, when two or more detection stations are set, the material trays do not hinder each other when flowing to each detection station. When the robot performs a handling operation on the material in the material tray at one of the detection stations, the material tray to be inspected can continue to flow into other detection stations, or the material tray after inspection can flow out from other detection stations, so that the robot can perform the handling operation continuously and uninterruptedly, effectively improving the work efficiency. Brief Description of the Drawings

[0039] Figure 1 It is a schematic structural diagram of the turnover device of the present utility model.

[0040] Figure 2 It is a schematic structural diagram of the tray in the present utility model.

[0041] Figure 3 It is a schematic structural diagram of the lifting mechanism in the present utility model.

[0042] Figure 4 It is a schematic structural diagram of the positioning mechanism in the present utility model.

[0043] Figure 5 It is a schematic structural diagram of the blocking mechanism in the present utility model.

[0044] Description of the reference numerals:

[0045] 100, conveyor line; 110, frame; 111, bracket; 120, conveyor belt; 200, tray; 210, recessed area; 220, tray body; 230, flange; 300, lifting mechanism; 310, lifting plate; 320, lifting drive member; 330, limiting structure; 331, connecting plate; 332, limiting block; 400, positioning mechanism; 410, first positioning assembly; 411, mounting frame; 412, clamping structure; 413, clamping member; 4131, clamping groove; 4132, first side wall; 4133, second side wall; 414, clamping drive member; 421, positioning block; 422, pushing structure; 423, pushing member; 4231, pushing portion; 4232, guiding portion; 424, pushing drive member; 425, pushing frame; 500, blocking mechanism; 510, blocking member; 520, blocking drive member; 600, stacking loading mechanism; 700, stacking unloading mechanism. Detailed Description of the Embodiments

[0046] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed embodiments of the present application in conjunction with the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the sake of convenience of description, only the parts related to the present application are shown in the drawings, rather than all the structures. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0047] As used in this application, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices.

[0048] References to "an embodiment" in this context mean that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase may occur in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0049] Please refer to Figure 1 As shown, the transfer device corresponding to a preferred embodiment of the present utility model includes: a conveyor line 100 for conveying a tray 200 carrying the material to be detected, and is provided with a detection station; a lifting mechanism 300 disposed at the detection station and located below the conveyor line 100, the lifting mechanism 300 being adapted to lift the tray 200 upward away from the conveyor line 100; a positioning mechanism 400 disposed at the detection station and located above the conveyor line 100, the positioning mechanism 400 being adapted to clamp the lifted tray 200, and a flow-through gap is formed between the tray 200 in the clamped state and the conveyor line 100; wherein, the number of detection stations is at least two and are arranged in sequence along the length direction of the conveyor line 100, and the lifting mechanism 300 and the positioning mechanism 400 correspond to the detection stations one by one.

[0050] By providing the lifting mechanism 300 and the positioning mechanism 400 at the detection stations of the conveyor line 100, when the conveyor line 100 conveys the tray 200 to the detection station, the lifting mechanism 300 can lift the tray 200 upward away from the conveyor line 100, and the positioning mechanism 400 is adapted to clamp the lifted tray 200. After the lifting mechanism 300 descends and resets, the tray 200 located downstream can flow through the clamped tray 200 driven by the conveyor line 100 and reach another detection station, that is, when two or more detection stations are provided, the trays 200 do not obstruct each other when flowing to each detection station. When the manipulator performs a handling operation on the material in the tray 200 at one of the detection stations, the tray 200 to be detected can continue to flow into other detection stations, or the tray 200 after detection can flow out from other detection stations, enabling the manipulator to continuously perform handling operations and effectively improving work efficiency.

[0051] Furthermore, the conveyor line 100 is a conventional belt conveyor line, which includes a frame 110, a conveyor belt 120 and a driving structure. The frame 110 includes two brackets 111 arranged relatively along the width direction of the conveyor line 100. There are two conveyor belts 120, which are respectively arranged on different brackets 111. The two conveyor belts 120 cooperate to support and convey the material tray 200.

[0052] Further, the lifting mechanism 300 is located between the two brackets 111, referring to Figure 2 and Figure 3 As shown, it includes a lifting plate 310, a lifting drive member 320 and a limiting structure 330. The lifting plate 310 is suitable for supporting the material tray 200. The lifting drive member 320 is transmission-connected to the lifting plate 310 to drive the lifting plate 310 to move up and down. The lifting drive member 320 can specifically adopt a linear cylinder. There are two limiting structures 330, which are arranged on both sides of the lifting plate 310 in the length direction of the conveyor line 100. The material tray 200 supported on the lifting plate 310 is limited between the two limiting structures 330.

[0053] Preferably, the tray 200 is recessed inward from its bottom surface to form a recessed area 210, and the lifting plate 310 is adapted to the recessed area 210. When the lifting plate 310 supports the tray 200, the recessed area 210 is covered outside the lifting plate 310, thereby improving the stability of the tray 200 on the lifting plate 310. The limiting structure 330 includes a connecting plate 331 and a limiting block 332. One side of the connecting plate 331 is connected to the bottom of the lifting plate 310, and the other side extends out of the lifting plate 310 along the length direction of the conveyor line 100. The limiting block 332 is arranged on the other side of the connecting plate 331 and is suitable for limiting the side of the connecting plate 331 in the length direction of the conveyor line 100, thereby improving the position accuracy of the tray 200 and facilitating the subsequent positioning mechanism 400 to reliably clamp the tray 200.

[0054] Further, refer to Figure 4As shown, the positioning mechanism 400 includes a first positioning component 410. The first positioning component 410 includes a mounting frame 411 and a clamping structure 412. The mounting frame 411 is connected to the conveyor line 100. The clamping structure 412 is arranged on the mounting frame 411. The number of the clamping structures 412 is two, and they are arranged oppositely along the length direction of the conveyor line 100. The clamping structure 412 includes a clamping member 413 and a clamping driving member 414 that is drivingly connected to the clamping member 413. The clamping driving member 414 can specifically adopt a linear cylinder, which is arranged on the mounting frame 411. The clamping member 413 is a strip-shaped structure. One end of it is fixed to the output end of the clamping driving member 414, and the other end extends above the conveyor belt 120 along the width direction of the conveyor line 100. A circulation gap is formed between the clamping member 413 and the conveyor belt 120 to prevent hindering the flow of the tray 200 on the conveyor belt 120. And when the tray 200 is in the lifted state, the two clamping members 413 are adapted to move towards or away from each other along the length direction of the conveyor line 100 under the drive of the clamping driving member 414 to clamp or release the tray 200.

[0055] Preferably, both of the two clamping members 413 are recessed inward from their top surfaces to form clamping grooves 4131. The clamping grooves 4131 are specifically located at the ends of the clamping members 413 away from the clamping driving member 414. The clamping grooves 4131 are adapted to support and clamp the tray 200 during the process of the clamping members 413 moving towards each other, thereby improving the stability of the clamped tray 200.

[0056] The clamping groove 4131 is an L-shaped groove. One side of it in the length direction and width direction of the conveyor line 100 is an open side. The clamping groove 4131 includes a first side wall 4132 and a second side wall 4133 that are opposite to different open sides. The first side wall 4132 and the second side wall 4133 are perpendicularly connected. The bottom walls of the two clamping grooves 4131 are adapted to cooperate to support the tray 200. The first side walls 4132 of the two clamping grooves 4131 are adapted to cooperate to clamp the sides of the tray 200 in the length direction of the conveyor line 100. The second side walls 4133 of the two clamping grooves 4131 are adapted to cooperate to limit the tray 200 in the width direction of the conveyor line 100 to prevent the tray 200 from deviating from the clamping groove 4131 during the clamping process.

[0057] Since a single first positioning assembly 410 can only support and clamp the two corners on one side of the tray 200 in the width direction, the support and stability of the tray 200 after clamping are poor. Preferably, in this embodiment, there are two first positioning assemblies 410, which are arranged on both sides of the conveyor line 100 in the width direction. The two first positioning assemblies 410 are symmetrically arranged along the central axis of the conveyor line 100, and the central axis is parallel to the length direction of the conveyor line 100. The two first positioning assemblies 410 are suitable for clamping the tray 200, so that the four corners of the tray 200 can be effectively clamped and supported, which greatly improves the stability of the tray 200 after clamping, and ensures the position accuracy of the tray 200 in the length direction of the conveyor line 100.

[0058] Furthermore, the positioning mechanism 400 further includes a second positioning assembly, which includes a positioning block 421 and a push structure 422, wherein the positioning block 421 is disposed on one of the mounting frames 411, and the push structure 422 is disposed on the other mounting frame 411. In this embodiment, the positioning block 421 and / or the push structure 422 are disposed in the middle of the mounting frame 411, and the two clamping structures 412 are respectively located on both sides of the mounting frame 411 in the length direction of the conveyor line 100.

[0059] The push structure 422 includes a push member 423 and a push driving member 424 that is transmission-connected to the push member 423. The push driving member 424 is specifically a linear cylinder. When the tray 200 is in the lifting state, the push member 423 is adapted to move along the width direction of the conveyor line 100 under the drive of the push driving member 424 to push the tray 200 to the positioning block 421, thereby ensuring the position accuracy of the tray 200 in the width direction of the conveyor line 100. A flow gap is formed between the push member 423 and the conveyor belt 120 and between the positioning block 421 and the conveyor belt 120 to avoid hindering the flow of the tray 200 on the conveyor belt 120.

[0060] Preferably, the push structure 422 further includes a push frame 425 connected to the push driving member 424, and the number of push members 423 is two, and they are arranged on both sides of the push frame 425 in the length direction of the conveyor line 100. The push member 423 can adjust the position relative to the push frame 425 along the length direction of the conveyor line 100 to adapt to trays 200 of different sizes. Specifically, a strip hole can be set on one of the push member 423 or the push frame 425, and a connecting hole matching the strip hole can be set on the other, which will not be described in detail in the present utility model.

[0061] The pushing members 423 include a pushing portion 4231 and a guiding portion 4232 vertically connected to the pushing portion 4231. The pushing portions 4231 of the two pushing members 423 are suitable for cooperating with pushing the sides of the material tray 200 in the width direction of the conveyor line 100, and the guiding portions 4232 of the two pushing members 423 are suitable for cooperating with limiting the material tray 200 in the length direction of the conveyor line 100 to prevent the material tray 200 from deviating from the pushing portion 4231 during the pushing process.

[0062] Furthermore, combined with Figure 2 As shown, in this embodiment, the tray 200 includes a tray body 220 and a flange 230, the recessed area 210 is recessed from the bottom of the tray body 220, the flange 230 is convexly arranged on the outer periphery of the tray body 220, and the bottom of the flange 230 is preferably flush with the bottom of the tray body 220. When the tray 200 is in the jacking state, the clamping structure 412 corresponds to the flange 230, the pushing structure 422 corresponds to the tray body 220, the pushing member 423 is suitable for pushing against the tray body 220, and the clamping member 413 is suitable for clamping the flange 230. By adopting the above structure, on the one hand, it is convenient to stack and place the tray 200 in other processes, and on the other hand, it can also avoid the clamping structure 412 clamping the tray 200 and the pushing structure 422 pushing against the tray 200. The mutual limitation can be avoided.

[0063] Further, refer to Figure 1 and Figure 5 As shown, the circulation device also includes a blocking mechanism 500 disposed at the detection station, and the blocking mechanism 500 corresponds to the detection station one by one. When the material tray 200 flows to the detection station, the blocking mechanism 500 is suitable for blocking the material tray 200 to prevent it from flowing away from the detection station. The blocking mechanism 500 is located between the two brackets 111, and includes a blocking member 510 and a blocking driving member 520 that is transmission-connected to the blocking member 510. The blocking driving member 520 is specifically a linear cylinder, which can drive the blocking member 510 to rise in the vertical direction to block the material tray 200 in the conveying direction of the conveyor line 100, or it can drive the blocking member 510 to descend to avoid hindering the flow of the material tray 200.

[0064] Further, the input end of the conveyor line 100 is provided with a stacking loading mechanism 600, and the output end of the conveyor line 100 is provided with a stacking unloading mechanism 700, the stacking loading mechanism 600 is suitable for loading the material trays 200 one by one to the conveyor line 100, and the stacking unloading mechanism 700 is suitable for unloading and stacking the material trays 200. The stacking loading mechanism 600 and the stacking unloading mechanism 700 are both well-known structures in the art, and the utility model will not be repeated here.

[0065] The working process of the flow device of the utility model is as follows: the material tray 200 carrying the material to be tested flows from the input end of the conveyor line 100 to the detection station; when one of the material trays 200 reaches the detection station, the blocking mechanism 500 rises to block the material tray 200, and the lifting mechanism 300 lifts the material tray 200 upward to put the material tray 200 in a lifted state, and then the first positioning component 410 clamps the material tray 200 to position and fasten the material tray 200 in the length direction of the conveyor line 100, and the second positioning component pushes against the material tray 200 to position and fasten the material tray 200 in the width direction of the conveyor line 100, and the manipulator can move the material on the positioned material tray 200 transport for inspection; then the lifting mechanism 300 and the blocking mechanism 500 descend, and the tray 200 located downstream can continue to flow along the conveyor line 100 through the inspection station and reach the remaining inspection stations, and repeat the above actions until each inspection station accommodates a tray 200; when the material inspection of one of the trays 200 is completed, the lifting mechanism 300 rises to support the tray 200, the first positioning assembly 410 and the second positioning assembly release the tray 200, and the lifting mechanism 300 lowers the tray 200 to the conveyor line 100 to flow to the output end of the conveyor line 100. At the same time, the manipulator can continue to perform material handling operations on the trays 200 of other inspection stations.

[0066] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A circulation device, characterized in that: include: A conveyor line (100) is used to convey a material tray (200) carrying a material to be inspected and is provided with an inspection station; A lifting mechanism (300) is arranged at the detection station and is located below the conveyor line (100), and the lifting mechanism (300) is suitable for lifting the material tray (200) upwards away from the conveyor line (100); A positioning mechanism (400) is arranged at the detection station and is located above the conveyor line (100); the positioning mechanism (400) is suitable for clamping the material tray (200) after being lifted, and a flow gap is formed between the material tray (200) in a clamped state and the conveyor line (100); There are at least two inspection stations, which are arranged in sequence along the length direction of the conveyor line (100), and the lifting mechanism (300) and the positioning mechanism (400) correspond one-to-one to the inspection stations.

2. The circulation device according to claim 1, characterized in that: The lifting mechanism (300) comprises: A lifting plate (310) adapted to support the material tray (200); A lifting driving member (320) is connected to the lifting plate (310) in a transmission manner so as to drive the lifting plate (310) to move upward and downward; There are two limiting structures (330) disposed on both sides of the lifting plate (310) in the length direction of the conveying line (100); Wherein, the material tray (200) supported on the lifting plate (310) is limited between the two limiting structures (330).

3. The circulation device according to claim 2, characterized in that: The limiting structure (330) comprises: A connecting plate (331), one side of which is connected to the bottom of the lifting plate (310), and the other side of which extends out of the lifting plate (310) along the length direction of the conveying line (100); A limiting block (332) is arranged on the other side of the connecting plate (331) and is suitable for limiting the side of the connecting plate (331) in the length direction of the conveying line (100); The material tray (200) is recessed inward from its bottom surface to form a recessed area (210), and the recessed area (210) is covered outside the connecting plate (331).

4. The circulation device according to claim 1, characterized in that: The positioning mechanism (400) comprises a first positioning component (410), wherein the first positioning component (410) comprises: A mounting frame (411) connected to the conveying line (100); A clamping structure (412) is arranged on the mounting frame (411), wherein the number of the clamping structures (412) is two and they are arranged opposite to each other along the length direction of the conveying line (100); Wherein, the clamping structure (412) includes a clamping member (413) and a clamping driving member (414) which is transmission-connected to the clamping member (413); when the material tray (200) is in a lifted state, the two clamping members (413) are suitable for moving toward or away from each other along the length direction of the conveying line (100) under the drive of the clamping driving member (414) to clamp or release the material tray (200).

5. The circulation device according to claim 4, characterized in that: The clamping member (413) is recessed inwardly from its top surface to form a clamping groove (4131), and the clamping groove (4131) is suitable for supporting and clamping the material tray (200) during the process of the clamping members (413) moving toward each other.

6. The circulation device according to claim 5, characterized in that: The clamping groove (4131) is an L-shaped groove, and one side of the conveying line (100) in the length direction and the width direction is an open side, and the clamping groove (4131) includes a first side wall (4132) and a second side wall (4133) vertically connected to the first side wall (4132); The bottom walls of the two clamping grooves (4131) are suitable for cooperating with the supporting material tray (200), the first side walls (4132) of the two clamping grooves (4131) are suitable for cooperating with the clamping material tray (200) on the sides in the length direction of the conveying line (100), and the second side walls (4133) of the two clamping grooves (4131) are suitable for cooperating with the limiting material tray (200) in the width direction of the conveying line (100).

7. The circulation device according to claim 4, characterized in that: The number of the first positioning components (410) is two, and they are arranged on both sides of the conveyor line (100) in the width direction. The two first positioning components (410) are suitable for cooperating with the clamping material tray (200).

8. The circulation device according to claim 7, characterized in that: The positioning mechanism (400) comprises a second positioning component, wherein the second positioning component comprises: A positioning block (421) is arranged on one of the mounting frames (411); A pushing structure (422) is arranged on another of the mounting frames (411); Wherein, the pushing structure (422) includes a pushing member (423) and a pushing driving member (424) drivingly connected to the pushing member (423); when the material tray (200) is in a lifted state, the pushing member (423) is suitable for moving along the width direction of the conveyor line (100) under the drive of the pushing driving member (424) to push the material tray (200) against the positioning block (421).

9. The circulation device according to claim 8, characterized in that: The push-pull structure (422) comprises a push-pull frame (425) connected to the push-pull driving member (424); the push-pull members (423) are two in number and are arranged on both sides of the push-pull frame (425) in the length direction of the conveying line (100); The push-pull member (423) comprises a push-pull portion (4231) and a guide portion (4232) vertically connected to the push-pull portion (4231); the push-pull portions (4231) of the two push-pull members (423) are suitable for cooperating with the side of the material tray (200) in the width direction of the conveyor line (100); and the guide portions (4232) of the two push-pull members (423) are suitable for cooperating with the material tray (200) in the length direction of the conveyor line (100).

10. The circulation device according to claim 8, characterized in that: The material tray (200) comprises: Tray body (220); A flange (230) protrudes from the outer periphery of the tray body (220); The pushing member (423) is suitable for pushing the tray body (220), and the clamping member (413) is suitable for clamping the flange (230).

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