Placement tray and transfer frame for batch inspection of circuit boards

Abstract

The utility model relates to the technical field of circuit board processing, and particularly discloses a placing tray and a transfer frame for batch inspection of circuit boards. Comprising a first tray and a second tray; one surface of the first tray is a mounting surface, and the other surface is a first placement surface; the first tray and the second tray are arranged in a mirror image manner; a plurality of placement grooves are formed in the mounting surfaces of the first tray and the second tray; the arrangement of the placement grooves formed in the first tray and the second tray is consistent; the placement grooves formed in the first tray and the second tray correspond to each other in pairs; the plurality of placement grooves are uniformly distributed at preset intervals; the first tray and the second tray are arranged in a mirroring manner to form a placement tray; the two ends of the circuit board pass through the two corresponding placement grooves in the first tray and the second tray respectively. The placing grooves are in pairwise correspondence, so that an operator can quickly and accurately place two ends of the circuit board into the corresponding placing grooves respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board processing, in particular to a placement tray and a transfer rack for batch inspection of circuit boards. Background Art

[0002] Before conducting batch inspection of circuit boards, we usually need to use a special placement tray to store the circuit boards and then take them all for inspection together. Using the placement tray can effectively improve the efficiency of batch inspection of circuit boards. Because when the circuit boards are placed on the tray, they can be neatly arranged together, facilitating the inspector to check multiple circuit boards at one time, thus greatly improving the inspection speed. The placement tray can help protect the circuit boards from being damaged during the inspection process. Circuit boards are very precise electronic components. If they are impacted or rubbed during the inspection process, it may cause damage to the components on the circuit board, thereby affecting the normal use of the circuit board. The placement tray can effectively reduce the impact and friction on the circuit boards during the inspection process and protect the safety of the circuit boards. Using the placement tray can also facilitate the classification and management of circuit boards. Because when the circuit boards are placed on the tray, the inspector can easily classify them, separating the normal circuit boards from the problematic ones, which is convenient for subsequent processing work.

[0003] In the patent "A Circuit Board Transportation Tray" (publication number: CN210417373U, hereinafter referred to as the prior art 1), a tray for placing circuit boards is disclosed. In the prior art 1, a raised portion is provided on the tray body, and a placement groove is formed inside it. The circuit board is placed in the groove, and a support groove is provided in the groove. The support groove forms a convex column on the reverse side of the tray body. A plurality of first grooves and a plurality of second grooves are provided on the side surface of the raised portion. The first groove is arc-shaped from a top view angle and extends from the side surface along the horizontal direction into the interior of the raised portion. The second groove is arc-shaped from a front view angle and extends from the side surface into the interior of the raised portion. Through this design in the prior art 1, when the circuit board is placed in the tray for transportation, it mainly utilizes the convex column formed by the support groove on the reverse side of the tray body and the second groove located on the side of the raised portion to form multi-directional support in the vertical and horizontal directions, providing stable support for the tray in the vertical direction and forming a tensile force against extrusion in the horizontal direction, thereby effectively solving the problems of deformation and collapse of the tray under pressure in the prior art.

[0004] Although the prior art 1 solves the problem of tray stability through a special structure, the placement groove for placing the circuit board cannot be adjusted and cannot adapt to circuit boards of different sizes. Moreover, the transportation of circuit boards in the prior art 1 is not convenient. Summary of the Utility Model

[0005] In view of this, an embodiment of the present utility model provides a placement tray and a transfer rack for batch inspection of circuit boards, so as to solve the problems of inflexible adjustment according to the shape and size of circuit boards and inconvenient transportation in the prior art.

[0006] In a first aspect, an embodiment of the present utility model provides a placement tray for batch inspection of circuit boards, including a first tray and a second tray; one side of the first tray is an installation surface, and the other side is a first placement surface; the first tray and the second tray are arranged in a mirror image; a plurality of placement grooves are provided on the installation surfaces of the first tray and the second tray; the placement grooves provided on the first tray and the second tray are arranged identically; the placement grooves provided on the first tray and the second tray correspond to each other in pairs; a plurality of the placement grooves are evenly distributed at a preset interval; the first tray and the second tray are arranged in a mirror image to form a placement tray; both ends of the circuit board are arranged through two corresponding placement grooves on the first tray and the second tray respectively; a label groove is provided on the outer surface of each placement groove.

[0007] Preferably, it further includes a third tray, and both sides of the third tray are respectively set as a second placement surface and a third placement surface; a plurality of placement grooves are provided on the second placement surface and the third placement surface.

[0008] Preferably, the installation grooves provided on the third tray are arranged identically to the placement grooves on the first tray and the second tray.

[0009] Preferably, the first tray and the second tray are arranged in a mirror image, the third tray is arranged between the first tray and the second tray, and the first tray, the second tray and the third tray are combined to form a placement tray.

[0010] In a second aspect, a transfer rack is provided, including a placement tray for batch inspection of circuit boards as described above; it further includes a carrier rack; the carrier rack is provided with a first frame and a second frame; the first frame and the second frame are made by splicing square steel; connectors are provided at the bottom and both sides of the bottom of the first frame and the second frame; the first frame and the second frame are connected by at least four connecting rods passing through the connectors; first outer frames and second outer frames are respectively provided at both ends of at least four connecting rods; universal wheels are provided at the bottoms of the first outer frames and the second outer frames.

[0011] Preferably, the first tray and the second tray are respectively installed on the first frame and the second frame.

[0012] Preferably, an installation plate is further provided between the first frame and the second frame; the installation plate is arranged in pairs at the bottom and top between the first frame and the second frame; the third tray is arranged on the installation plate.

[0013] Preferably, connectors are respectively provided on both sides of the mounting plate; the mounting plate is connected to the first frame and the second frame by a connecting rod passing through the connectors.

[0014] Preferably, first fasteners are further provided on both sides of the first frame and the second frame; limiting rods are provided on both sides of the mounting plate through pairs of the first fasteners and second fasteners.

[0015] Preferably, a grounding chain is provided at the bottom of the limiting rod.

[0016] The placement tray and transfer rack for batch inspection of circuit boards provided by the present utility model have the following beneficial effects:

[0017] Since the first tray and the second tray are arranged in a mirror image and the placement grooves correspond to each other in pairs, operators can quickly and accurately place the two ends of the circuit board into the corresponding placement grooves respectively. This design greatly simplifies the placement steps, reduces the time consumed by manual position adjustment, and thus improves the efficiency of the overall inspection process. And by setting the installation distance between the first tray and the second tray, the range of size adaptation to the circuit board can be adjusted. The placement tray is carried by the transfer rack, which is more convenient for the transportation of the circuit board. Each placement groove can serve as a temporary "identity label" for the circuit board. By recording or marking the information of each slot or circuit board through the label slot, the status and position of each circuit board can be conveniently managed and traced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, and these are all within the protection scope of the present utility model.

[0019] Figure 1 is a schematic structural diagram of a placement tray and a transfer rack for batch inspection of circuit boards;

[0020] Figure 2 is a schematic structural diagram of a transfer rack for batch inspection of circuit boards;

[0021] Figure 3 is a schematic structural diagram of a placement tray for batch inspection of circuit boards;

[0022] Figure 4 is a partial structural diagram of a transfer rack for batch inspection of circuit boards;

[0023] Figure 5 is another partial structural diagram of a transfer rack for batch inspection of circuit boards;

[0024] Figure 6 It is a partial structural schematic diagram of the first tray;

[0025] Figure 7 It is a partial structural schematic diagram of the third tray;

[0026] Parts and numbers in the figure:

[0027] 100 - placement tray, 110 - first tray, 111 - mounting surface, 112 - first placement surface, 120 - second tray, 113 - placement groove, 130 - third tray, 131 - second placement surface, 132 - third placement surface;

[0028] 210 - first frame, 220 - second frame, 211 - connecting piece, 212 - connecting rod, 230 - first outer frame, 240 - second outer frame, 250 - universal wheel, 260 - mounting plate, 261 - first fastener, 262 - second fastener, 263 - limiting rod, 264 - grounding chain;

[0029] 300 - circuit board. Specific embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. In the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including the said elements. If there is no conflict, the embodiments of the present utility model and the various features in the embodiments can be combined with each other, and all are within the protection scope of the present utility model.

[0031] Example 1

[0032] Please refer to Figure 1 , the embodiment of the present utility model provides a placement tray for batch inspection of circuit boards. This tray is set to improve the efficiency and accuracy of batch inspection of circuit board 300. It can effectively support and fix the circuit board 300, so that the circuit board 300 will not move or tilt during the inspection process, thus ensuring the accuracy of the inspection. In addition, this tray also has sufficient strength and stability to bear the weight of a large number of circuit boards 300, making the batch inspection more efficient.

[0033] Please refer to Figure 2 , the placement tray 100 required for batch inspection of the circuit board 300 mainly consists of two basic components, namely the first tray 110 and the second tray 120. The cooperation of these two trays forms a clamping structure that can effectively clamp and place the circuit board 300. When the circuit board 300 is placed at the designated position between the first tray 110 and the second tray 120, a stable support structure can be formed for subsequent inspection work. This setting not only improves the efficiency of circuit board 300 inspection, but also ensures the safety and stability of the circuit board 300 during the inspection process. Through this structure, the process of batch inspection of the circuit board 300 becomes more efficient and reliable.

[0034] Please refer to Figure 3 and Figure 7 , the first tray 110 has two opposite surfaces, one of which is defined as the mounting surface 111, and the other is called the first placement surface 112. The setting of these two surfaces is for the tray to be fixed and installed in a specific way. At the same time, the second tray presents a mirror-symmetrical layout with the first tray, which ensures the unity and coordination of the structures of the two trays. To achieve the stability and reliability of the tray, both the first tray 110 and the second tray 120 are fixedly installed through their mounting surfaces 111. This process can use screws, clamps or other types of fasteners to ensure that the tray can be firmly held in place after installation and will not move due to external vibration or force. Each outer surface of the placement groove 113 is provided with a label groove. It is convenient to manage and track the status and position of each circuit board 300.

[0035] Meanwhile, the first placement surface 112 also plays an important role in the setting of the tray. It is the part specifically used to place the circuit board 300, which is a key component for transmitting and processing information in electronic devices. The first placement surface provides a stable and firm working platform for the circuit board 300, thus ensuring that the circuit board 300 can be correctly and stably installed on the tray, which is crucial for the overall performance and function realization of electronic devices. And by setting the installation distance between the first tray 110 and the second tray 120, the range of size adaptation to the circuit board 300 can be adjusted. The tray carrying is borne by the transfer rack, making the transportation of the circuit board 300 more convenient.

[0036] Please refer to Figure 3 , a number of placement grooves 113 are provided on the installation surfaces 111 of the first tray 110 and the second tray 120, and the circuit board 300 is clamped and fixed by the placement grooves 113 on the first tray 110 and the second tray 120 arranged in a mirror image. A plurality of placement grooves 113 are provided on the installation surfaces 111 of these two trays. These placement grooves 113 are provided to accurately position and fix the circuit board 300. Through the mirror image arrangement, the placement grooves 113 on the first tray 110 and the second tray 120 can clamp and fix the circuit board 300 in a symmetrical manner. This not only improves the stability and reliability of the installation of the circuit board 300, but also makes the whole device more symmetrical and beautiful in structure. The circuit board 300 fixed in this way can better resist external vibration and impact, thus greatly improving the service life of the circuit board 300 and the overall performance of the system.

[0037] Please refer to Figure 3 , the placement grooves 113 provided on the first tray 110 and the second tray 120 are arranged identically; the placement grooves 113 provided on the first tray 110 and the second tray 120 correspond to each other in pairs. The placement grooves 113 provided on the first tray 110 and the second tray 120 are designed to be consistent. The shapes, sizes and positions of these grooves are the same, ensuring that they can adapt to the same specifications of items or components. In addition, each placement groove 113 on the first tray 110 exactly corresponds to the corresponding groove on the second tray 120, forming an accurate corresponding relationship. This elaborate design ensures the coordination between the trays, and can maintain order and efficiency both during the process of loading items and during the handling and storage of items.

[0038] A number of the placement grooves 113 are evenly distributed at a preset interval. A number of the placement grooves 113 are arranged in a pattern of one groove and one protrusion, and the circuit board 300 is placed through the grooves. Among them, the height settings of each groove and protrusion are the same, making the placement of the circuit board 300 more uniform. When placing, one can be placed in each placement groove 113, or several placement grooves 113 can be skipped for placement. The first tray 110 and the second tray 120 are arranged in a mirror image to form the placement tray 100; both ends of the circuit board 300 are arranged through two corresponding placement grooves 113 on the first tray 110 and the second tray 120 respectively.

[0039] Please refer to Figure 3 It further includes a third tray 130. Both sides of the third tray 130 are respectively set as a second placement surface 131 and a third placement surface 132; a number of placement grooves 113 are provided on the second placement surface 131 and the third placement surface 132. The installation grooves provided on the third tray 130 are arranged in the same way as the placement grooves 113 on the first tray 110 and the second tray 120. The first tray 110 and the second tray 120 are arranged in a mirror image, and the third tray 130 is arranged between the first tray 110 and the second tray 120. The first tray 110, the second tray 120 and the third tray 130 are combined to form the placement tray 100.

[0040] A better option further includes a third tray 130. The third tray 130 has two surfaces, namely a second placement surface 131 and a third placement surface 132; on these two surfaces, a number of placement grooves 113 are carefully designed and arranged. The layout of these placement grooves 113 on the third tray 130 is completely corresponding to the placement grooves 113 on the first tray 110 and the second tray 120 to ensure that items can be placed smoothly and stably, and can cooperate with the placement surfaces of the first tray 110 and the second tray 120.

[0041] It should be noted that the first tray 110 and the second tray 120 are arranged in a mirror image, and this design cleverly ensures the symmetry and stability of the tray. The third tray 130 is cleverly placed between the first tray 110 and the second tray 120. Such a layout enables the three trays to be seamlessly combined together to form a complete placement tray 100. This placement tray 100 not only has a reasonable structure but also is convenient to use, greatly improving the efficiency and stability of item placement.

[0042] Embodiment 2

[0043] Please refer to Figure 1, an embodiment of the present utility model provides a transfer rack, including a placement tray for batch inspection of circuit boards as described above. The placement tray 100 for batch inspection of the circuit board 300 is provided on the transfer rack, installed through the transfer rack, and moves with the movement of the transfer rack.

[0044] The transfer rack includes a carrier; the carrier is provided with a first frame 210 and a second frame 220; the first frame 210 and the second frame 220 are made by splicing square steel. These two frames are the basis for constructing the entire carrier. They are spliced by square steel pipes (square steel). The selection of this structure is to ensure the stability and strength of the entire rack so that it can bear a large weight.

[0045] Please refer to Figure 2 , connectors 211 are provided on the bottom and both sides of the bottom of the first frame 210 and the second frame 220; the first frame 210 and the second frame 220 are connected by at least four connecting rods 212 passing through the connectors 211. Whether it is the first frame 210 or the second frame 220, connectors 211 for connection are provided at their bottoms. Moreover, these connectors 211 are not only on one side, but are distributed on the bottom and its two sides, which can provide more connection points and enhance the stability and reliability of the entire frame.

[0046] When assembling these frames, at least four connecting rods 212 are required to pass through these connectors 211 to tightly connect the first frame 210 and the second frame 220 together. This connection method not only ensures the firmness between the two frames, but also provides a guarantee for the balanced distribution of the entire structure, making the transfer rack more stable during actual use.

[0047] Please refer to Figure 1 , first outer frames 230 and second outer frames 240 are respectively provided at both ends of at least four of the connecting rods 212; universal wheels 250 are provided at the bottoms of the first outer frames 230 and the second outer frames 240. This setting includes at least four connecting rods 212, and first outer frames 230 and second outer frames 240 are respectively fixed at both ends of these connecting rods 212. Universal wheels 250 are installed at the bottoms of these two outer frames. Such a setting makes the entire structure highly flexible and mobile. The setting of the universal wheels 250 enables the first outer frames 230 and the second outer frames 240 to move freely on various grounds. Whether it is the inspection tabletop or an uneven ground, they can maintain good mobility. In addition, the setting of the universal wheels 250 also makes the connection between the connecting rods 212 and the outer frames more stable, avoiding possible shaking or tilting during the movement and ensuring the stability and safety of the overall structure. Further, all the universal wheels 250 have locking parts, and the locking parts can be clamped with the wheel bodies of the universal wheels 250 to restrict the rotation of their wheel bodies.

[0048] The two trays mentioned above, namely the first tray and the second tray, are respectively installed on the first frame and the second frame. The trays are installed in the frames in an embedded manner. Moreover, since they are respectively installed on two frames, there may be a certain placement distance for the circuit board 300 between the two frames.

[0049] Please refer to Figure 4 , preferably, a mounting plate 260 is further provided between the first frame 210 and the second frame 220; the mounting plates 260 are arranged in pairs at the bottom and top between the first frame 210 and the second frame 220; the third tray 130 is arranged on the mounting plate 260. The mounting plate 260 is used to expand the placement space of the circuit board 300. The combination of the original first tray 110 and the second tray 120 can place a group of circuit boards 300, and the number of trays is expanded through the mounting plate 260. The third tray 130, as the middle tray, can cooperate with the first tray 110 and the second tray 120 respectively on both sides to place the circuit board 300. Multiple intermediate third trays 130 can also be expanded through the mounting plate 260, so that multiple placement spaces for the circuit boards 300 can be formed, making it possible to accommodate a large number of circuit boards 300.

[0050] Please refer to Figure 1 and Figure 4 , connecting pieces 211 are respectively provided on both sides of the mounting plate 260; the mounting plate 260 is connected to the first frame 210 and the second frame 220 through a connecting rod 212 passing through the connecting pieces 211. When the mounting plate 260 is added, the problem of its overall load-bearing will be improved. By setting the connecting pieces 211, it is made to cooperate with the connecting rod 212, and the connecting rod 212 is used for load-bearing. The stability of the structure is increased. Of course, such an expansion has a certain limit, and it is necessary to calculate the load-bearing capacity and life of the connecting rod 212 and the installation weight of the overall circuit board 300 after expansion to judge whether they can be safely placed without damaging the overall mechanism.

[0051] Please refer to Figure 1 , first fasteners 261 are further provided on both sides of the first frame 210 and the second frame 220; first fasteners 261 are provided on both sides of the mounting plate 260; a limiting rod 263 is provided through the paired first fasteners 261 and second fasteners 262. The limiting rod 263 is detachably installed, so that the limiting rod 263 can limit the movement of the circuit board 300 and make it be restricted in the installation groove. The limiting rods 263 are arranged on both sides of the circuit board 300.

[0052] Preferably, the edge positions of the first frame 210 and the second frame 220 are also provided with first fasteners 261; at the same time, the edge positions of the mounting plate 260 are also provided with second fasteners 262; through the paired first fasteners 261 and second fasteners 262, the limiting rod 263 can be installed and fixed. With the detachable feature of the limiting rod 263, the convenient installation and disassembly of the limiting rod 263 can be achieved, and further the movement of the circuit board 300 can be restricted, ensuring that the circuit board 300 can be stably positioned in the installation groove.

[0053] Please refer to Figure 5 , a grounding chain 264 is provided at the bottom of the limiting rod 263. This design can effectively prevent the circuit board 300 from generating static electricity. Once the circuit board 300 generates static electricity, the grounding chain 264 can conduct it away in time to ensure that the static electricity will not damage the circuit board 300. Through such measures, not only can the circuit board 300 be protected, but also the stability of the circuit board 300 can be improved and its service life can be extended. At the same time, this design is also beneficial to improving the anti-interference ability of the entire device, enabling it to maintain good working performance in a complex environment.

[0054] Furthermore, please refer to Figure 2 , a circuit board 300 tray can be arranged between the first tray 110 and the second tray 120, and the circuit board 300 is fixed on the circuit board 300 tray. It can be adapted to the circuit board 300 or the tray of the circuit board 300. To enhance the compatibility and practicability of the device, the flexibility between the first tray 110 and the second tray 120 is considered. Between these two trays, a special area for placing the circuit board 300 is planned, and this area can place the circuit board 300 tray. Its function is to ensure that the circuit board 300 can be stably placed and fixed on the circuit board 300 tray, thus providing a safe and stable working environment for the circuit board 300. Such a design not only considers the circuit board 300 itself, but also considers the situation where the circuit board 300 tray may be needed, thus greatly improving the use range and flexibility of the entire device.

[0055] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tray for batch inspection of circuit boards, characterized in that: The invention comprises a first tray (110) and a second tray (120); one side of the first tray (110) is a mounting surface (111), and the other side is a first placement surface (112); the first tray (110) and the second tray (120) are arranged in a mirror image; The mounting surfaces (111) of the first tray (110) and the second tray (120) are both provided with a plurality of placement grooves (113); the placement grooves (113) provided on the first tray (110) and the second tray (120) are arranged in a consistent manner; the placement grooves (113) provided on the first tray (110) and the second tray (120) correspond to each other in pairs; and the plurality of placement grooves (113) are evenly distributed at preset intervals; The first tray (110) and the second tray (120) are arranged in a mirror image to form a placement tray (100); the two ends of the circuit board are respectively arranged through two corresponding placement grooves (113) on the first tray (110) and the second tray (120); and each placement groove (113) is provided with a label groove on its outer surface.

2. A placement tray for batch inspection of circuit boards according to claim 1, characterized in that: It also comprises a third tray (130), the two sides of which are respectively arranged as a second placement surface (131) and a third placement surface (132); a plurality of placement grooves (113) are arranged on the second placement surface (131) and the third placement surface (132).

3. A placement tray for batch inspection of circuit boards according to claim 2, characterized in that: The installation grooves arranged on the third tray (130) are arranged in the same manner as the placement grooves (113) on the first tray (110) and the second tray (120).

4. The placement tray for batch inspection of circuit boards according to claim 3, characterized in that: The first tray (110) and the second tray (120) are arranged in a mirror image, the third tray (130) is arranged between the first tray (110) and the second tray (120), and the first tray (110), the second tray (120) and the third tray (130) are combined to form a placement tray (100).

5. A transfer rack, characterized in that: It comprises a placement tray for batch inspection of circuit boards as claimed in any one of claims 1 to 4; it also comprises a carrier frame; the carrier frame is provided with a first frame (210) and a second frame (220); the first frame (210) and the second frame (220) are made of square steel splicing; The bottom and both sides of the bottom of the first frame (210) and the second frame (220) are provided with connecting pieces (211); the first frame (210) and the second frame (220) are connected by at least four connecting rods (212) passing through the connecting pieces (211); A first outer frame (230) and a second outer frame (240) are respectively provided at both ends of at least four of the connecting rods (212); and universal wheels (250) are provided at the bottoms of the first outer frame (230) and the second outer frame (240).

6. A transfer rack according to claim 5, characterized in that: The first tray (110) and the second tray (120) are respectively mounted on the first frame (210) and the second frame (220).

7. A transfer rack according to claim 6, characterized in that: A mounting plate (260) is also provided between the first frame (210) and the second frame (220); the mounting plates (260) are arranged in pairs at the bottom and the top between the first frame (210) and the second frame (220); and the third tray (130) is arranged on the mounting plate (260).

8. A transfer rack according to claim 7, characterized in that: Connecting pieces (211) are respectively provided on both sides of the mounting plate (260); the mounting plate (260) is connected to the first frame (210) and the second frame (220) via a connecting rod (212) passing through the connecting pieces (211).

9. A transfer rack according to claim 7, characterized in that: First fasteners (261) are also provided on both sides of the first frame (210) and the second frame (220); and limiting rods (263) are provided on both sides of the mounting plate (260) through the paired first fasteners (261) and second fasteners (262).

10. A transfer rack according to claim 9, characterized in that: A grounding chain (264) is provided at the bottom of the limiting rod (263).

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