Upper / lower tray device and upper and lower tray device

Abstract

The utility model discloses an upper / lower tray device and an upper / lower tray device, which comprise a tray conveying assembly and a tray lifting assembly, and the tray conveying assembly is used for conveying trays; the tray lifting assembly is used for lifting the tray; the tray conveying assembly comprises a conveying belt driving assembly and a plurality of conveying belts, and a gap is formed between every two adjacent conveying belts. The conveying belt driving assembly is used for driving the conveying belt to convey trays. The tray lifting assembly comprises a lifting driving assembly and a plurality of supporting brackets, the bearing brackets are used for bearing trays, and a gap between every two adjacent conveying belts at least corresponds to one bearing bracket; the lifting driving assembly is used for driving the bearing support to ascend to the feeding position higher than the conveying belts and descend to the upper tray position and the lower tray position of the gap between the adjacent conveying belts. The trays are conveyed to the tray lifting assembly through the tray conveying assembly, the tray lifting assembly lifts the trays to the feeding position for feeding, automatic tray feeding / discharging can be achieved, and the automation degree and the working efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of feeding devices, and specifically relates to a loading / unloading tray device. Background Art

[0002] In an electronic device assembly production line, there are often several components, such as chips, heat sinks, etc. Generally, a tray is needed to load several components for easy feeding. The tray filled with components is placed at the feeding position, and the components are fed from the tray to the processing position through a feeding device. After feeding, the empty tray is removed from the feeding position, and then the tray filled with components is placed at the feeding position.

[0003] Currently, the placement of the tray is generally carried out manually. However, since the feeding position has a certain height and there is a certain height difference from the tray storage position, manual operation is time-consuming and laborious, and automated production cannot be achieved.

[0004] In the prior art, the horizontal position of the tray is also adjusted through a conveyor belt, but the adjustment of both the horizontal position and the height position cannot be achieved simultaneously, which is not suitable for the situation of tray feeding.

[0005] The above information disclosed in this background art is only used to increase the understanding of the background art of this application. Therefore, it may include prior art that is not known to those of ordinary skill in the art. Summary of the Utility Model

[0006] The utility model provides a loading / unloading tray device, which solves the technical problem of time-consuming and laborious loading / unloading of trays.

[0007] To achieve the above utility model / design purpose, the utility model adopts the following technical solutions:

[0008] A loading / unloading tray device includes:

[0009] A tray conveying assembly for conveying the tray;

[0010] A tray lifting assembly for lifting the tray;

[0011] The tray conveying assembly includes:

[0012] Several conveyor belts with gaps between adjacent conveyor belts;

[0013] A conveyor belt driving assembly for driving the conveyor belt to convey the tray;

[0014] The tray lifting assembly includes:

[0015] Several bearing brackets for bearing the tray, and the gaps between adjacent conveyor belts correspond to at least one bearing bracket;

[0016] The lifting drive assembly is used to drive the carrying bracket to rise to a loading position higher than the conveyor belt and descend to the upper / lower tray position in the gap between adjacent conveyor belts.

[0017] For the upper / lower tray device as described above, when the lifting drive assembly drives the carrying bracket to descend to the upper / lower tray position in the gap between adjacent conveyor belts, the carrying surface of the carrying bracket is flush with the conveying surface of the conveyor belt, or the carrying surface of the carrying bracket is lower than the conveying surface of the conveyor belt.

[0018] For the upper / lower tray device as described above, the length of the conveying surface of the conveyor belt is longer than the length of the carrying surface of the carrying bracket.

[0019] For the upper / lower tray device as described above, the tray conveying assembly includes conveying guide rails located on both sides of the conveyor belt. The conveying surface of the conveying guide rails is flush with the conveying surface of the conveyor belt, and the gap is located between the conveying guide rails.

[0020] For the upper / lower tray device as described above, a limiting structure is provided between at least a pair of adjacent conveying guide rails.

[0021] For the upper / lower tray device as described above, the tray lifting assembly includes:

[0022] A connecting member for connecting the carrying bracket;

[0023] A vertical slide rail slidably assembled with the connecting member;

[0024] The lifting drive assembly includes a vertical screw, and the connecting member is threadedly assembled with the vertical screw.

[0025] For the upper / lower tray device as described above, a first detection device is provided at positions corresponding to the loading position and the upper / lower tray position of the tray lifting assembly; a second detection device is provided on the tray conveying assembly.

[0026] For the upper / lower tray device as described above, tray guiding structures are provided on both sides of the tray conveying assembly and / or the tray lifting assembly.

[0027] An upper and lower tray device, the upper / lower tray device comprising an upper tray device and a lower tray device, the upper tray device being the above-mentioned upper tray device, the lower tray device being the above-mentioned lower tray device, the upper tray device comprising an upper tray conveying assembly and an upper tray lifting assembly, the lower tray device comprising a lower tray conveying assembly and a lower tray lifting assembly; a tray transfer device is provided between the upper tray device and the lower tray device; the loading tray conveying assembly is used to convey the tray to the upper tray lifting assembly, the upper tray lifting assembly is used to lift the tray on the upper tray conveying assembly to the loading position of the upper tray device, the tray transfer device is used to transfer the tray from the loading position of the loading tray device to the loading position of the lower tray device, the lower tray lifting assembly is used to lower the tray at the loading position of the lower tray device to the lower tray device conveying assembly, and the lower tray device conveying assembly is used to output the tray from the lower tray device.

[0028] For the upper and lower tray device as described above, the tray transfer device comprises:

[0029] A cross beam, located above the upper tray device and the lower tray device;

[0030] A grasping device, located on the cross beam, the grasping device being used to grasp the tray;

[0031] A driving device, used to drive the grasping device to move along the cross beam.

[0032] Compared with the prior art, the advantages and positive effects of the present utility model are:

[0033] The upper / lower tray device of the present utility model comprises a tray conveying assembly and a tray lifting assembly. The tray conveying assembly is used to convey the tray; the tray lifting assembly is used to lift and lower the tray; the tray conveying assembly comprises a conveyor belt driving assembly and a plurality of conveyor belts, and there is a gap between adjacent conveyor belts; the conveyor belt driving assembly is used to drive the conveyor belt to convey the tray; the tray lifting assembly comprises a lifting driving assembly and a plurality of supporting brackets, the bearing brackets being used to bear the tray, and the gap between adjacent conveyor belts corresponds to at least one bearing bracket; the lifting driving assembly is used to drive the bearing bracket to rise to a loading position higher than the conveyor belt and to lower to the upper and lower tray positions in the gap between adjacent conveyor belts. In the present utility model, the bearing brackets correspond to the gaps between adjacent conveyor belts. Therefore, the tray is conveyed to the tray lifting assembly by the tray conveying assembly, and the tray lifting assembly lifts the tray to the loading position for loading, which can realize automatic upper / lower tray, improving the degree of automation and work efficiency.

[0034] An upper / lower tray device includes an upper tray device and a lower tray device. The upper tray device includes an upper tray conveying component and an upper tray lifting component, and the lower tray device includes a lower tray conveying component and a lower tray lifting component. A tray transfer device is arranged between the upper tray device and the lower tray device. The feeding tray conveying component is used to convey the tray to the upper tray lifting component, the upper tray lifting component is used to lift the tray on the upper tray conveying component to the loading position of the upper tray device, the tray transfer device is used to transfer the tray from the loading position of the feeding tray device to the loading position of the lower tray device, the lower tray lifting component is used to lower the tray at the loading position of the lower tray device to the lower tray device conveying component, and the lower tray device conveying component is used to output the tray from the lower tray device. In the present utility model, the upper tray device is used to lift the tray to the loading position for loading, the empty tray is transferred from the upper tray device to the lower tray device through the tray transfer device, and the lower tray device outputs the empty tray. Therefore, the upper tray device and the lower tray device of the present utility model are separately arranged, further improving the production efficiency.

[0035] After reading the specific embodiments of the present utility model in conjunction with the accompanying drawings, other features and advantages of the present utility model will become clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0037] Figure 1 is a schematic diagram of an embodiment of the upper / lower tray device proposed by the present utility model;

[0038] Figure 2 is a schematic diagram of the tray conveying component of an embodiment of the upper / lower tray device proposed by the present utility model;

[0039] Figure 3 is a schematic diagram of the tray lifting component of an embodiment of the upper / lower tray device proposed by the present utility model;

[0040] Figure 4 is a schematic diagram of another specific embodiment of the upper / lower tray device proposed by the present utility model.

[0041] In the figure:

[0042] 1. Tray conveying component;

[0043] 11. Conveyor belt; 111. Gap;

[0044] 12. Driving motor;

[0045] 13. Conveyor guide rail;

[0046] 14. Limit structure;

[0047] 15. Second detection device;

[0048] 2. Pallet lifting assembly;

[0049] 21. Bearing bracket;

[0050] 22. Connecting piece;

[0051] 23. Lifting motor;

[0052] 24. Vertical screw;

[0053] 25. Vertical slide rail;

[0054] 26. First detection device;

[0055] 3. Pallet guiding structure;

[0056] 4. Upper pallet device;

[0057] 5. Lower pallet device;

[0058] 6. Pallet transfer device;

[0059] 61. Cross beam;

[0060] 62. Gripping device. Detailed implementation manners

[0061] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0062] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 therefore, should not be construed as a limitation to the present utility model.

[0063] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0064] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0065] In the description of the present utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0066] An upper / lower tray device can convey a tray filled with workpieces to the upper / lower tray position, automatically lift it to the loading position for loading. After loading, the empty tray after loading is lowered from the upper / lower tray loading position to the upper / lower tray position and output.

[0067] The following specifically describes the upper / lower tray device in conjunction with the accompanying drawings:

[0068] In Figures 1-3 the example, the upper / lower tray device includes a tray conveying assembly 1 and a tray lifting assembly 2.

[0069] The upper / lower tray device realizes the input, loading, and output of the full tray through a set of tray conveying assembly 1 and tray lifting assembly 2.

[0070] The tray conveying assembly 1 is used to convey the tray.

[0071] Specifically, the tray conveying assembly 1 is used to convey the tray in the horizontal direction.

[0072] The tray lifting assembly 2 is used to lift and lower the tray.

[0073] Specifically, the tray lifting assembly 2 is used to lift and lower the tray in the vertical direction.

[0074] Combining the tray conveying assembly 1 and the tray lifting assembly 2, the tray conveying assembly 1 can convey the tray to the tray lifting assembly 2, and the tray lifting assembly 2 can convey the tray to the tray conveying assembly 1 to realize the conveyance of the tray in the horizontal and vertical directions, so as to facilitate the delivery and collection of the tray at a low position.

[0075] The tray conveying assembly includes a conveyor belt driving assembly and a plurality of conveyor belts 11. The conveyor belts 11 are used for conveying trays, and the conveyor belt driving assembly is used to drive the conveyor belts 11 to run so as to further achieve the purpose of conveying trays.

[0076] The plurality of conveyor belts 11 are arranged at intervals, that is, there is a gap 111 between adjacent conveyor belts 11, and the gap 111 is used to accommodate part of the tray lifting assembly 2.

[0077] Specifically, in the direction perpendicular to the conveying direction of the conveyor belt 11, a gap 111 is formed between adjacent conveyor belts.

[0078] The conveyor belt driving assembly is used to drive the conveyor belt to convey the tray.

[0079] Specifically, the conveyor belt driving assembly includes a driving motor 12 and a driving roller linked with the driving motor 12.

[0080] In some embodiments, the conveyor belt driving assembly includes a driven roller, and the conveyor belt 11 is located between the driving roller and the driven roller.

[0081] In some embodiments, all the conveyor belts 11 are driven to run synchronously by one driving roller. Correspondingly, only one driving motor 12 may be provided.

[0082] In the example with a driven roller, only one driven roller may be provided.

[0083] In some embodiments, each conveyor belt is driven to run by a plurality of driving rollers respectively. Correspondingly, a plurality of driving motors 12 may be provided, and the plurality of driving motors 12 run synchronously.

[0084] In the example with a driven roller, a plurality of driven rollers may be provided.

[0085] The tray conveying assembly 1 includes conveying guide rails 13. The conveying guide rails 13 are located on both sides of the conveyor belt 11. The conveying guide rails 13 serve as an auxiliary for the conveyor belt 11, which can reduce the pressure on the conveyor belt 11 and avoid deformation of the conveyor belt 11 caused by pressure.

[0086] The upper surface of the conveying guide rail 13 is a conveying surface, and the upper surface of the conveyor belt 11 is a conveying surface. Therefore, the conveying surface of the conveying guide rail 13 is flush with the conveying surface of the conveyor belt 11, so as to drive the tray to move by the conveyor belt 11, and at the same time, the conveying guide rail 13 protects the conveyor belt 11.

[0087] The gap 111 for accommodating part of the tray lifting assembly 2 is located between the conveying guide rails 13.

[0088] A limiting structure 14 is arranged between at least a pair of adjacent conveying guide rails 13.

[0089] In some embodiments, the limiting structure 14 is a connecting plate for connecting adjacent conveying guide rails 13, and the limiting structure 14 is located below the gap 111.

[0090] The limiting structure 14 is used to limit the lowest position of the tray lifting assembly 2.

[0091] The tray lifting assembly 2 includes a lifting drive assembly, a connecting member 22, and a plurality of carrying brackets 21.

[0092] The connecting member 22 is used to connect the carrying brackets 21.

[0093] The lengths of the plurality of carrying brackets 21 are arranged in parallel, and the same end portions of the carrying brackets 21 are connected by the carrying brackets 21.

[0094] The plurality of carrying brackets 21 are used to carry the tray, and the carrying brackets 21 can be lowered to the gap 111 between the conveyor belts 11.

[0095] The gap 111 between adjacent conveyor belts 11 corresponds to at least one carrying bracket 21.

[0096] Generally, the gap between adjacent conveyor belts 11 corresponds to one carrying bracket 21.

[0097] The lifting drive assembly is used to drive the carrying bracket 21 to rise to a loading position higher than the conveyor belt 11 and to descend to an upper / lower tray position at the gap 111 between adjacent conveyor belts 11.

[0098] The lifting drive assembly includes a lifting motor 23 and a vertical screw 24, and the lifting motor 23 drives the vertical screw 24 to rotate.

[0099] The vertical screw 24 is threadedly assembled with the connecting member 22.

[0100] The tray lifting assembly includes a vertical slide rail 25, which is slidably assembled with the connecting member 22.

[0101] There are two vertical slide rails 25, and the two vertical slide rails 25 are distributed on both sides of the vertical screw 24.

[0102] The vertical slide rail 25 is used to limit the connecting member 22 to only be able to lift and lower in the vertical direction and cannot rotate in the horizontal direction.

[0103] When the lifting drive assembly drives the carrying bracket 21 to descend to the upper / lower tray position at the gap between adjacent conveyor belts 11, the carrying surface of the carrying bracket 21 is flush with the conveying surface of the conveyor belt 11, or the carrying surface of the carrying bracket 21 is lower than the conveying surface of the conveyor belt 11.

[0104] The length of the conveying surface of the conveyor belt 11 is longer than the length of the bearing surface of the bearing bracket 21, so that the conveyor belt 11 can convey the tray to or out of the bearing bracket 21.

[0105] A first detection device 26 is provided at a position corresponding to the loading position and the upper / lower tray position of the tray lifting assembly. The first detection device 26 is used to detect the position of the bearing bracket 21, that is, the first detection device 26 is used to detect the position of the tray. When the first detection device 26 detects the bearing bracket 21, the lifting drive assembly stops driving.

[0106] The tray conveying assembly is provided with a second detection device 15. The second detection device 15 is used to detect the position of the tray on the tray conveying assembly. When the second detection device 15 detects the tray, the conveyor belt drive assembly stops driving.

[0107] Tray guiding structures 3 are provided on both sides of the tray conveying assembly 1 and / or the tray lifting assembly 2.

[0108] The tray guiding structure 3 is used to guide the tray during the horizontal movement or vertical lifting of the tray.

[0109] The driving motor 12 rotates forward, and the conveyor belt 11 conveys the tray filled with workpieces to be processed in the direction of the tray lifting assembly 2. When the second detection device detects the tray, the driving motor 12 stops rotating. The lifting motor 23 drives the vertical screw 24 to rotate forward, and the bearing bracket 21 drives the tray to rise. When the tray reaches the loading position, the upper first detection device detects the bearing bracket 21, and the lifting motor 23 stops rotating. At this time, feeding can be performed through the feeding device, and the workpieces to be processed in the tray are fed to the processing station. After all the workpieces to be processed in the tray are loaded, the lifting motor 23 drives the vertical screw 24 to rotate reversely, and the bearing bracket 21 drives the tray to lower. When the tray reaches the upper / lower tray position, the lower first detection device detects the bearing bracket 21, and the lifting motor 23 stops rotating. The driving motor 12 rotates reversely, and the conveyor belt 11 conveys the empty tray in the direction away from the tray lifting assembly 2.

[0110] Through a set of upper / lower tray device, the upper full-load tray and the lower empty tray are realized, with simple structure and low cost.

[0111] In Figure 4 's example, an upper / lower tray device is proposed, which includes an upper tray device, a lower tray device and a tray transfer device 6 located between the upper tray device and the lower tray device.

[0112] Among them, the upper tray device is used for loading full-load trays, and the lower tray device is used for unloading empty trays. The tray transfer device 6 is used to transfer the tray from the loading position of the loading tray device to the loading position of the lower tray device.

[0113] The upper / lower pallet device realizes the input and loading of full pallets through a set of pallet conveying components and pallet lifting components, and realizes the output of empty pallets through another set of pallet conveying components and pallet lifting components, which can further improve work efficiency.

[0114] The upper pallet device includes an upper pallet conveying component and an upper pallet lifting component. The upper pallet conveying component is the Figures 1-3 pallet conveying component in Figures 1-3 and the upper pallet lifting component is the

[0115] pallet lifting component in Figures 1-3 The lower pallet device includes a lower pallet conveying component and a lower pallet lifting component; the lower pallet conveying component is the Figures 1-3 pallet conveying component in

[0116] The loading pallet conveying component is used to convey the full pallet to the upper pallet lifting component. The upper pallet lifting component is used to lift the pallet on the upper pallet conveying component to the loading position of the upper pallet device. The pallet transfer device 6 is used to transfer the pallet from the loading position of the upper pallet device to the loading position of the lower pallet device. The lower pallet lifting component is used to lower the pallet at the loading position of the lower pallet device to the lower pallet device conveying component, and the lower pallet device conveying component is used to output the pallet from the lower pallet device.

[0117] The pallet transfer device 6 includes a cross beam 61, a grasping device 62 and a driving device.

[0118] The cross beam 61 is located above the upper pallet device 4 and the lower pallet device 5.

[0119] The grasping device 62 is located on the cross beam 61, and the grasping device is used to grasp the pallet.

[0120] The grasping device can be, for example, a suction cup or a manipulator, etc.

[0121] The driving device is used to drive the grasping device 62 to move along the cross beam 61.

[0122] The driving motor of the feeding tray conveying assembly rotates forward, and the feeding tray conveying assembly conveys the full tray to the upper tray lifting assembly. When the second detection device detects the tray, the driving motor of the feeding tray conveying assembly stops rotating. The lifting motor of the upper tray lifting assembly rotates forward, and the bearing bracket drives the tray to rise. The upper tray lifting assembly raises the tray on the feeding tray conveying assembly to the loading position of the upper tray device. When the first detection device above detects the bearing bracket, the lifting motor stops rotating. At this time, feeding can be carried out through the feeding device to load the workpieces to be processed in the tray onto the processing station. After all the workpieces to be processed in the tray are loaded, the tray transfer device 6 transfers the tray from the loading position of the upper tray device to the loading position of the lower tray device. The lifting motor of the lower tray lifting assembly drives its vertical screw to rotate reversely, and the lower tray lifting assembly lowers the tray at the loading position of the lower tray device to the lower tray device conveying assembly. When the first detection device below detects the bearing bracket, the lifting motor of the lower tray lifting assembly stops rotating. The driving motor of the lower tray conveying assembly rotates reversely, and the conveyor belt conveys the empty tray in a direction away from the lower tray lifting assembly. The lower tray device conveying assembly is used to output the tray from the lower tray device. The lifting motor of the lower tray lifting assembly drives the vertical screw to rotate forward, and the lower tray lifting assembly raises the bearing bracket 21 to the loading position of the upper tray device. When the first detection device above detects the bearing bracket, the lifting motor stops rotating.

[0123] In this example, the upper tray device is used to load the full tray, and the lower tray device is used to unload the empty tray, which greatly improves the working efficiency.

[0124] 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, for those of ordinary skill in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present invention.

Claims

1. An upper / lower tray device, comprising: A tray conveying assembly for conveying the tray; A tray lifting assembly for lifting the tray; Characterized in that, The tray conveying assembly includes: A plurality of conveyor belts with a gap between adjacent conveyor belts; A conveyor belt driving assembly for driving the conveyor belt to convey the tray; The tray lifting assembly includes: A plurality of bearing brackets for bearing the tray, and the gap between adjacent conveyor belts corresponds to at least one bearing bracket; A lifting driving assembly for driving the bearing bracket to rise to a loading position higher than the conveyor belt and descend to an upper / lower tray position in the gap between the adjacent conveyor belts.

2. The upper / lower tray device according to claim 1, characterized in that, When the lifting driving assembly drives the bearing bracket to descend to the upper / lower tray position in the gap between the adjacent conveyor belts, the bearing surface of the bearing bracket is flush with the conveying surface of the conveyor belt, or the bearing surface of the bearing bracket is lower than the conveying surface of the conveyor belt.

3. The upper / lower tray device according to claim 1, characterized in that, The length of the conveying surface of the conveyor belt is longer than the length of the bearing surface of the bearing bracket.

4. The upper / lower tray device according to claim 1, characterized in that, The tray conveying assembly includes conveying guide rails located on both sides of the conveyor belt. The conveying surface of the conveying guide rail is flush with the conveying surface of the conveyor belt, and the gap is located between the conveying guide rails.

5. The upper / lower tray device according to claim 4, characterized in that, A limiting structure is provided between at least a pair of adjacent conveying guide rails.

6. The upper / lower tray device according to claim 1, characterized in that, The tray lifting assembly includes: A connecting piece for connecting the bearing bracket; A vertical slide rail slidably assembled with the connecting piece; The lifting driving assembly includes a vertical screw rod, and the connecting piece is threadedly assembled with the vertical screw rod.

7. The upper / lower tray device according to claim 1, wherein A first detection device is provided at a position corresponding to the loading position and the upper / lower tray position of the tray lifting assembly; a second detection device is provided on the tray conveying assembly.

8. The upper / lower tray device according to claim 1, wherein, Tray guiding structures are provided on both sides of the tray conveying assembly and / or the tray lifting assembly.

9. An upper and lower tray device, characterized in that, The upper / lower tray device includes an upper tray device and a lower tray device. The upper tray device is the upper / lower tray device according to any one of claims 1-8, and the lower tray device is the upper / lower tray device according to any one of claims 1-8. The upper tray device includes an upper tray conveying assembly and an upper tray lifting assembly, and the lower tray device includes a lower tray conveying assembly and a lower tray lifting assembly; a tray transfer device is provided between the upper tray device and the lower tray device; the upper tray conveying assembly is used to convey the tray to the upper tray lifting assembly, the upper tray lifting assembly is used to lift the tray on the upper tray conveying assembly to the loading position of the upper tray device, the tray transfer device is used to transfer the tray from the loading position of the upper tray device to the loading position of the lower tray device, the lower tray lifting assembly is used to lower the tray at the loading position of the lower tray device to the lower tray device conveying assembly, and the lower tray device conveying assembly is used to output the tray from the lower tray device.

10. The upper and lower tray device according to claim 9, characterized in that, The tray transfer device includes: A cross beam located above the upper tray device and the lower tray device; A grasping device located on the cross beam, and the grasping device is used to grasp the tray; A driving device for driving the grasping device to move along the cross beam..

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