Pallet, pallet assembly and connecting device thereof

Abstract

The present application discloses a pallet, a pallet assembly and a connecting device thereof. The connecting device of the pallet of the present application comprises a first connecting member and a second connecting member. The first connecting member is configured to be detachably mounted on the base of the pallet. The second connecting member is configured to be detachably mounted on the base of the pallet. When two adjacent pallets are arranged side by side, the first connecting member can simultaneously pass through at least a portion of the base of each pallet. The second connecting member can lock the first connecting member to connect the two pallets side by side. The connecting device of the present application can conveniently connect more than two pallets to each other.

Description

Technical Field

[0001] The present invention relates to logistics equipment, in particular to a pallet. Background Art

[0002] The general specifications of existing pallets are 1200×1000mm, 1000*600mm. The length and width of these pallets are matched with transport carriers such as containers, vans, forklifts, and trucks. In order to maximize the use of the space of the transport carrier, the specifications and sizes of pallets are relatively standardized and unified. However, in fact, in addition to carrying goods as a transport carrier, the application of pallets has been extended more and more widely to the fast-moving consumer goods market in addition to the single function of a transport carrier, such as commodity display and display. The scope of application and hidden value of the pallet itself have been redeveloped, and the scope of application has increased. The problem is that different application scenarios have different requirements for the size and applicable functions of the pallet. The pallet still needs to be used as a carrier to transport the goods. At the same time, when the goods arrive at the fast-moving consumer goods market, they must meet their display and display functions, as well as the storage function in the warehouse of the fast-moving consumer goods market. These relatively complex application environments limit the application of relatively standardized and uniform-sized pallets, making them difficult to be used in various scenarios. Summary of the invention

[0003] An object of the present invention is to provide a pallet connecting device capable of conveniently connecting two pallets to each other, and a corresponding pallet and pallet assembly.

[0004] To achieve the above object, the present invention provides a connection device for a pallet, the connection device comprising:

[0005] a first connecting member configured to be detachably mounted on a base of the tray; and

[0006] The second connecting member is configured to be detachably mounted on the base of the pallet. When two adjacent pallets are arranged side by side, the first connecting member can simultaneously pass through at least a portion of the base of each pallet, and the second connecting member can lock the first connecting member to connect the two pallets side by side.

[0007] In one embodiment, the first connecting member and the second connecting member are further configured such that when the interconnected trays are unlocked by the second connecting member, the first connecting member can be taken out to separate the two interconnected trays.

[0008] In one embodiment, the connecting device further includes a driving member, wherein the first connecting member is a connecting tube, a connecting hole is provided on the side wall of the connecting tube, and the second connecting member has a limiting portion, wherein the driving member cooperates with the second connecting member and can drive the limiting portion of the second connecting member to enter or disengage from the connecting hole.

[0009] In one embodiment, the second connecting member has a cylindrical body, the limiting portion is an elastic clip arranged on the side wall of the cylindrical body, the elastic clip is connected to a passive portion, the driving member is installed inside the cylindrical body and is provided with a driving portion, wherein the driving portion is configured to be able to drive the passive portion to drive the elastic clip to move, so that the elastic clip is disengaged from the connecting hole.

[0010] In one embodiment, the driving member has a cylindrical body, the inner bottom surface of the cylindrical body is provided with an operating part, the outer wall of the end of the cylindrical body is provided with the driving part, and the shape of the driving part is configured to drive the passive part to make corresponding movement when the driving member rotates.

[0011] In one embodiment, the first connecting member is a connecting tube, both ends of the connecting tube are provided with connecting holes, and the side wall of the second connecting member is provided with an elastic buckle, and the elastic buckle cooperates with the connecting hole to fix the second connecting member to the first connecting member.

[0012] In one embodiment, the connecting device further comprises a third connecting member, and the third connecting member is used to connect corresponding supporting members of adjacent trays.

[0013] The present invention also provides a connecting device for a pallet, the connecting device having a first connecting member and a second connecting portion, the first connecting member being configured to be movably mounted on the base of the pallet and being provided with a connecting hole, the second connecting portion being an elastic arm arranged on the base of the pallet, the elastic arm being provided with an elastic clip and an operating portion, wherein the elastic clip can enter the connecting hole to connect two pallets to each other, and the operating portion can operate the elastic clip to disengage the elastic clip from the connecting hole.

[0014] The present invention further provides a pallet, which has a base and a support member, wherein the support member is installed on the lower surface of the base, and the base of the pallet is provided with a plurality of connecting channels parallel to the upper surface of the base and passing through the base, wherein the plurality of connecting channels are spaced apart at predetermined intervals, and the plurality of connecting channels are used to install the connecting device as described above to connect two or more adjacent pallets to each other.

[0015] The present invention further provides a tray assembly, which comprises at least two trays connected to each other, each of the trays having a base and a support member, the support member being mounted on the lower surface of the base, and at least two of the trays being connected to each other via the connection device as described above.

[0016] Preferably, the tray assembly further comprises a third connecting member, wherein one end of one of the third connecting members is connected to a supporting member of one tray, and the other end of the third connecting member is connected to a corresponding supporting member of another tray.

[0017] The pallet connection device of the present application can connect two independent pallets. After the pallets are connected in parallel, the pallet has a larger and wider cargo carrying range. When there is only one pallet, it can be used as a single pallet. Through the connection device, the pallet can be quickly switched between single and / or multiple connections to meet the requirements of pallet applications in different occasions. The connection device of the present application is easy to operate, simple in structure, and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 1 is a perspective view of a tray according to a first embodiment of the present invention, in which a part is cut away to show the internal structure.

[0019] Figure 2 yes Figure 1 Enlarged view of part A.

[0020] Figure 3 is an exploded perspective view of a connecting device according to an embodiment of the present invention.

[0021] Figure 4 yes Figure 3 A three-dimensional sectional view of a second connecting member of a connecting device.

[0022] Figure 5 yes Figure 3 A three-dimensional view of the drive member of the connecting device.

[0023] Figure 6 yes Figure 5 A three-dimensional cross-sectional view of a driving member.

[0024] Figure 7 It is a cross-sectional view of the cooperation between the second connecting member and the driving member, wherein the connecting device is in a locked state.

[0025] Figure 8 It is a cross-sectional view of the cooperation between the second connecting member and the driving member, wherein the connecting device is in an unlocked state.

[0026] Fig. 9 is through Figure 3 A three-dimensional view of a tray assembly consisting of two trays connected to each other by a connecting device.

[0027] Fig.10 yes Fig. 9 An enlarged view of part B, in which the connecting device is in a locked state.

[0028] Fig.11 yes Fig. 9 An enlarged view of part B in the unlocked state.

[0029] Fig.12 is through Figure 3 A three-dimensional view of another tray assembly connected to each other by a connecting device.

[0030] Fig.13 is a perspective view of a tray according to a second embodiment of the present invention.

[0031] Fig.14 There are two Fig.13 A three-dimensional view of a tray assembly composed of trays connected to each other by a connecting device, wherein a part of the tray is cut away to show the internal structure.

[0032] Fig.15 yes Fig.14 An enlarged view of part C of the embodiment in which the connecting device is in a locked state.

[0033] Fig.16 yes Fig.14 An enlarged view of part C of the unlocked state.

[0034] Fig.17 yes Fig.14 An exploded perspective view of a connecting device, wherein the second connecting member is cut away.

[0035] Fig.18 1 is a perspective view of a tray according to a third embodiment of the present invention, in which a part is cut away to show the internal structure.

[0036] Fig.19 is a three-dimensional view of a tray assembly consisting of two trays connected to each other by a connecting device.

[0037] Fig. 20 yes Fig.19 An enlarged view of part D of the embodiment in which the connecting device is in a locked state.

[0038] Fig.21 yes Fig.19 An enlarged view of part D of FIG. 1 when it is unlocked.

[0039] Fig. 22 yes Fig.19 A three-dimensional view of the first connecting piece of the connecting device. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0041] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0042] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0043] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0044] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0045] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0046] Figure 1 A structural diagram of a pallet that can be connected to another pallet by a connecting device is shown. Figure 1As shown, the pallet 1 has a base 2 and a support member 3. The support member 3 is installed on the lower surface of the base 2. The base 2 is a plate-like member with a certain thickness. The support member 3 serves as a supporting foot of the base 2, and its lower surface is usually a flat surface. The lower surface of the support member 3 may be provided with an anti-slip pad. The pallet 1 has a plurality of support members 3 spaced apart from each other. Usually the number of support members is at least 2. The number of support members 3 is set according to the specifications of the pallet. In the present application, the specifications of the pallet are, for example, 1200mm*1000mm, or 1000mm*600mm.

[0047] The base 2 of the tray 1 is provided with a plurality of connection channels 4 which are parallel to the upper surface of the base 2 and penetrate the base. The plurality of connection channels 4 are spaced apart at predetermined intervals. The connection device 5 of the present application can pass through the connection channels 4 to connect two or more trays together.

[0048] See also Figure 2-8 , the connecting device 5 has a first connecting member 6. The first connecting member 6 is a steel pipe. The cross section of the steel pipe is preferably square. A connecting hole 7 is provided on the side walls at both ends of the first connecting member 6. When two pallets are connected to each other, the first connecting member 6 is detachably mounted on the base 2 of the pallet 1 and passes through the connecting channel 4. The first connecting member passes through at least a portion of the base 2 of each pallet 1 at the same time. In other words, when the two pallets are connected to each other, at least a portion of the first connecting member is in the first pallet of the two pallets connected to each other, and at least another portion is in the other pallet of the two pallets connected to each other.

[0049] The connecting device 5 further comprises a second connecting member 8. The second connecting member 8 is detachably mounted on the base 2 of the tray 1. When two adjacent trays 1 are placed side by side, the second connecting member 8 can lock the first connecting member 6 to connect the two trays 1 side by side.

[0050] like Figure 3 and Figure 4 As shown, in this embodiment, the second connecting member 8 has a cylindrical body 9. An elastic arm 9f is provided on the side wall of the cylindrical body 9. An elastic buckle 10 is provided at the end of the elastic arm 9f, and the elastic buckle 10 is used as a limiting portion for limiting the first connecting member. Specifically, when the two pallets are connected to each other, the elastic buckle 10 enters the connecting hole 7 of the first connecting member 6, thereby connecting the first connecting member 6 and the second connecting member 8 to each other. When the two pallets are connected, the first connecting member passes through the two pallets at the same time. One end of the first connecting member 6 is located at the side edge of one pallet and is connected and locked to a second connecting member 8, and the other end is located at the corresponding side edge of the other pallet and is connected and locked to the other second connecting member 8. As a result, the first connecting member 6 is fixed in the two pallets, so that the two pallets are connected to each other through the first connecting member 6.

[0051] A passive portion 11 is further provided on the side wall of the second connecting member 8. The passive portion 11 is also located at the end of the elastic arm 9f. The passive portion 11 is connected to the elastic buckle 10. Thus, the movement of the elastic buckle 10 can be controlled by controlling the passive portion 11. In a free state, the elastic buckle 10 protrudes outward from the outer surface of the side wall of the cylindrical body 9, while the passive portion 11 protrudes inward from the inner surface of the side wall of the cylindrical body 9. Thus, operating the passive portion 11 inside the cylindrical body 9 can drive the elastic buckle 10 to move toward the inside of the cylindrical body 9, so that it is disconnected from the first connecting member 6, and the connecting device 5 is unlocked.

[0052] The inner side wall of the cylindrical body 9 of the second connecting member 8 is provided with a limiting protrusion 9a, a limiting platform 9b and a limiting rib 9c in sequence from the inside to the outside in the axial direction, and their uses will be further described below. The second connecting member 8 is further provided with an elastic limiting boss 9d, which is used to fix the second connecting member to the base of the tray.

[0053] A groove 9e is further provided on the outer side wall of the cylindrical body 9 of the second connecting member 8. The groove 9e is used for installing the sealing member 20.

[0054] The connecting device 6 further has a driving member 12. The driving member 12 is installed inside the cylindrical body of the second connecting member 8. After the driving member 12 rotates by a certain angle, it can drive the passive part 11 of the second connecting member 8 to move, thereby driving the elastic buckle 10 to move, so that the first connecting member 6 and the second connecting member 8 are unlocked.

[0055] See also Figure 5 and Figure 6 , the driving member 12 has a cylindrical body. An operating portion 13 is provided on the inner bottom surface of the cylindrical body. The user can operate the operating portion 13 to drive the driving member 12 to rotate. A driving portion 14 is provided on the outer wall at the end of the cylindrical body. The shape of the driving portion 14 is configured to drive the passive portion 11 of the second connecting member 8 to make corresponding movements when the driving member 12 rotates. Here, the passive portion 11 can move inwardly under the drive of the driving portion 14, thereby driving the elastic buckle 10 to move inwardly to release the lock. In this embodiment, the driving portion 14 is a section of an arc-shaped wall.

[0056] A limiting portion 15, a limiting portion 16 and a limiting portion 17 are radially extended outward in the axial direction from the outer wall of the driving member 12. The limiting portion 15 cooperates with the limiting protrusion 9a of the second connecting member 8 to position the driving member 12, so that the driving portion 14 on the driving member 12 cooperates with the passive portion 11 of the second connecting member 8. The limiting portion 16 cooperates with the limiting platform 9b of the second connecting member 8 to limit the axial movement of the driving member 12 relative to the second connecting member 8. The limiting portion 17 cooperates with the limiting rib 9c of the second connecting member to control the rotation angle of the driving member 12 relative to the second connecting member 8. A mounting portion 12a is directly provided between the limiting portion 15 and the limiting portion 16, which is used to rotatably mount the driving member on the second connecting member 8. A groove 18 is also provided on the outer wall of the driving member 12 for mounting a sealing ring 19.

[0057] See also Figure 7 and Figure 8 During assembly, the driving member 12 is inserted into the second connecting member 8. Thus, when the driving member 12 rotates a certain angle, the driving portion 14 of the driving member 12 drives the passive portion 11 of the second connecting member 8 to move, so that the elastic buckle 10 moves downward, thereby unlocking the second connecting member 8 and the first connecting member 6, and the first connecting member 6 and the second connecting member 8 can be separated. When the driving member rotates a certain angle in the opposite direction, the driving portion 14 and the passive portion 11 are matched, and the elastic buckle 10 is reset.

[0058] Figure 9-11 The two trays are shown connected by the above-mentioned connecting device 5. Figure 9-11 As shown, when two pallets are connected to each other, the two pallets are first placed side by side, and then the first connecting member 6 is inserted into the connecting channel of one pallet and passed through the other pallet. Next, two second connecting members 8 are respectively inserted into the connecting channels and connected to the two ends of the first connecting member 6. The elastic limiting boss 9d of the second connecting member 8 cooperates with the limiting portion 3d of the base to fix the second connecting member to the base of the pallet. Finally, the driving member 12 is inserted into the second connecting member 8. Thus, the locking and unlocking of the second connecting member and the first connecting member can be controlled by operating the driving member 12.

[0059] When two pallets (or more pallets) are connected to form a pallet assembly, preferably, corresponding support members of the two pallets are connected to each other through a third connecting member to improve the connection strength. Fig.12The pallet assembly has two pallets, and the two pallets are connected to each other by a connecting device 5. A third connecting member 21 is also connected between the corresponding supporting members of the two pallets, that is, the two supporting members located on the same straight line. The third connecting member 21 is used for connection. The third connecting member 21 can be made of a steel sheet. One end of the third connecting member 21 is connected to a supporting member of one pallet, for example, by a screw 21a. The other end of the third connecting member 21 is connected to the corresponding supporting member of the other pallet. In this way, the corresponding supporting members of the two pallets are connected to each other.

[0060] Figure 13-17 FIG. 2 shows a structural diagram of a tray 22 and a connecting device 23 thereof according to a second embodiment of the present invention. Fig.13 As shown, the tray 22 and Figure 1 The structures of the trays 1 shown are substantially the same, the only difference being the corresponding structures connected to the connecting device 23 .

[0061] like Figure 15-17 As shown, the connecting device 23 has a first connecting member 24 and a second connecting member 25. The first connecting member 24 can pass through the two trays at the same time to connect the two trays together. Both ends of the first connecting member 24 are respectively connected to the corresponding second connecting members 25 to lock the first connecting member 24 relative to the base 26 of the tray 22.

[0062] The first connecting member 24 is a steel pipe. The cross section of the steel pipe is preferably square. Both ends of the first connecting member 24 are provided with connecting holes 27.

[0063] The second connecting member 25 has a cylindrical body 28. The cross section of the cylindrical body 28 is square. An elastic arm 29 is provided on one side wall of the cylindrical body 28. An elastic buckle 29a and an operating portion 29b are provided on the elastic arm 20. Another elastic buckle 30 is provided on the other side wall of the cylindrical body 28. The elastic buckle 29a and the elastic buckle 30 are spaced apart from each other by a predetermined distance along the axial direction of the cylindrical body 20. The elastic buckle 29a can be buckled into the connecting hole 27 on the first connecting member, thereby connecting the first connecting member 24 and the second connecting member 25 to each other. The elastic buckle 30 can be buckled into the corresponding structure on the base of the tray, thereby fixing the second connecting member 25 to the base.

[0064] The head end of the second connecting member 25 is also provided with a stopper 31. The stopper 31 can cover the connection channel on the base to prevent foreign matter from entering. A positioning portion 32 is also extended inwardly from one side of the stopper 31. After assembly, the positioning portion 32 abuts against the end of the first connecting member 24.

[0065] When connecting two trays 22 to each other, first place the two trays 22 side by side, and then insert the first connecting member 24 from the connecting channel of one tray and pass through the other tray. Next, insert the two second connecting members 25 into the connecting channels and connect them to the two ends of the first connecting member 24 respectively. The elastic buckle 29a of the second connecting member is buckled into the connecting hole of the first connecting member 24 to lock the connection between the first connecting member and the second connecting member. The elastic buckle 30 of the second connecting member cooperates with the corresponding structure of the base to fix the second connecting member 25 to the base of the tray 22. In this way, the two trays are connected to each other to form a tray assembly, such as Fig.14 shown.

[0066] When the two trays are to be separated, the operating portion 29b on the elastic arm 29 can be operated to disengage the elastic buckle 29a from the connecting hole of the first connecting member 24, thereby unlocking the first connecting member 24 from the second connecting member 25. Then, the second connecting member 25 and the first connecting member 24 are taken out in turn to separate the two trays.

[0067] Figure 18-22 The structure diagram of the tray assembly and its connecting device 34 composed of the tray 33 according to the third embodiment of the present invention is shown. Figure 18-22 As shown, the base 33a of the tray 33 has a plurality of connecting channels 33b for installing the connecting device 34. The connecting device 34 has a first connecting member 35 and a second connecting portion 36. The second connecting portion 36 is arranged on the base. The first connecting member 35 can be movably installed on the base of the tray 33 and connected and locked with the second connecting portion 36 to connect the two trays to each other.

[0068] like Fig. 22 As shown, the first connecting member 35 has a tubular body 37. A stopper 38 is provided at one end of the tubular body to prevent foreign matter such as dust from entering the connecting passage. One or more connecting holes 39 are provided on the side wall of the tubular body.

[0069] like Fig.18 As shown, the second connection part 36 is an elastic arm 40 disposed on the base 33a of the tray 33. The elastic arm 40 is provided with an elastic buckle 41 and an operating part 42. The elastic buckle 41 can enter the connection hole 39 to connect the two trays to each other. The operating part 42 can operate the elastic buckle 41 to make the elastic buckle 41 disengage from the connection hole 39.

[0070] When two trays 33 are connected to each other, the two trays 33 are first placed side by side, and then the first connecting member 35 is inserted from the connecting channel of one tray and passes through the other tray. At the same time, the elastic buckle 4 on the base of the tray is buckled into the connecting hole 39 on the first connecting member 35. Thus, the two trays are connected to each other to form a tray assembly, such as Fig.19 shown.

[0071] When the two trays are to be separated, the operating portion 42 on the elastic arm 40 can be operated to disengage the elastic buckle 41 from the connecting hole of the first connecting member 35, thereby unlocking the first connecting member 35 from the base. Then, the first connecting member 35 is removed in sequence to separate the two trays.

[0072] Preferred embodiments of the present invention have been described above in detail, but it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0073] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be considered limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

Claims

1. A tray connection device, characterized in that: The connecting device comprises: a first connecting member configured to be detachably mounted on a base of the tray; and a second connecting member, wherein the second connecting member is configured to be detachably mounted on the base of the pallet, and when two adjacent pallets are horizontally arranged side by side, the first connecting member can simultaneously pass through at least a portion of the base of each pallet, and the second connecting member can lock the first connecting member to connect the two pallets horizontally and side by side together; The first connecting member is a connecting tube, both ends of which are provided with connecting holes, and the side wall of the second connecting member is provided with an elastic buckle, and the elastic buckle cooperates with the connecting hole so that the second connecting member is fixedly connected to the first connecting member; The connecting device further comprises a driving member, wherein the driving member cooperates with the second connecting member and can drive the elastic buckle of the second connecting member to enter or disengage from the connecting hole.

2. The connection device according to claim 1, characterized in that The first connecting member and the second connecting member are further configured such that when the interconnected trays are unlocked by operating the second connecting member, the first connecting member can be taken out to separate the two interconnected trays.

3. The connection device according to claim 1, characterized in that The second connecting member has a cylindrical body, the elastic buckle is connected to a passive part, the driving member is installed inside the cylindrical body and is provided with a driving part, wherein the driving part is configured to drive the passive part to drive the elastic buckle to move, so that the elastic buckle is disengaged from the connecting hole.

4. The connection device according to claim 3, characterized in that The driving member has a cylindrical body, the inner bottom surface of the cylindrical body is provided with an operating part, the outer wall of the end of the cylindrical body is provided with the driving part, and the shape of the driving part is arranged to drive the passive part to make corresponding movement when the driving member rotates.

5. The connection device according to claim 1, characterized in that: The connecting device also has a third connecting member, and the third connecting member is used to connect corresponding supporting members of adjacent pallets.

6. The connection device according to claim 1, characterized in that The second connecting member is an elastic arm arranged on the base of the tray, and the elastic arm is provided with an elastic clip and an operating part, wherein the elastic clip can enter the connecting hole to connect two horizontally parallel trays to each other, and the operating part can operate the elastic clip to make the elastic clip detach from the connecting hole.

7. A tray comprising a connecting device according to any one of claims 1 to 6, the tray comprising a base and a support member, the support member being mounted on the lower surface of the base, characterized in that: The base of the tray is provided with a plurality of connection channels which are parallel to the upper surface of the base and penetrate the base, the plurality of connection channels are spaced apart at predetermined intervals, and the plurality of connection channels are used to install the connection device to connect two or more adjacent trays which are horizontally arranged in parallel with each other.

8. A tray assembly, characterized in that: The tray assembly comprises at least two trays as claimed in claim 7 connected to each other, wherein each of the trays has a base and a support member, the support member is mounted on the lower surface of the base, and at least two of the trays horizontally arranged in parallel are connected to each other via the connecting device.

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