Rail mounting structure and container

The rail installation structure in container boxes uses insertable connections to improve installation efficiency and maintain thermal insulation, preventing weight gain and enhancing transport stability.

CN223101596UActive Publication Date: 2025-07-15SHENGSHI CONTAINER MANAGEMENT SHANGHAI +1
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Patent Information

Application Number
CN202421749529.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-23
Publication Date
2025-07-15
Estimated Expiration
2034-07-23

AI Technical Summary

Technical Problem

The fixed tracks used to fix cargo in existing containers are inefficient in the installation process of connecting and fixing with the inner plate, and there is a gap in the fixing of rivets, resulting in problems such as reducing the insulation performance of the container and increasing weight.

Method used

The track installation structure is adopted, and the fixed track is connected through the plug-in method of the inner plate slot and the track slot to avoid the use of rivets, improve the installation efficiency and maintain the sealing and insulation of the container.

Benefits of technology

It realizes efficient track installation, improves the sealing and insulation of the container, avoids increasing self-weight, and ensures the load weight and storage effect during transportation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a track mounting structure and a container, the track mounting structure comprises a track back plate and a connecting end part, the connecting end part is at least formed at one end of the track back plate, and an inner side plate slot and a track slot are formed on the connecting end part; the depth direction of the inner side plate inserting groove is perpendicular to the rail back plate, and the opening direction of the inner side plate inserting groove deviates from the rail back plate. The depth direction of the track slot is parallel to the track back plate, and the opening direction of the track slot deviates from the inner side plate slot; the rail mounting structure is connected with the inner side plate and the fixed rail in an inserting mode, fixing parts such as rivets are not needed for fixing, the mounting efficiency can be improved, the inner side plate does not need to be penetrated, the sealing performance and the heat preservation performance of the container are higher, the dead weight is prevented from being increased, and the carrying weight and the storage effect in the transportation process are guaranteed.
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Description

Technical Field

[0001] The utility model belongs to the technical field of insulated containers, and specifically relates to an orbital installation structure and a container. Background Art

[0002] A container is a unitized tool that can load packaged or unpackaged goods for transportation and is convenient for loading and unloading with mechanical equipment. Each of the current general containers is a large whole, and the volume inside the container is relatively large.

[0003] When loading goods, the goods shake relatively much during transportation, which easily causes damage to the goods during movement. It is necessary to fix them with horizontal struts or lashing straps, and the horizontal struts or lashing straps need to be clamped in the fixed tracks on the side plates.

[0004] Generally, the existing fixed tracks need to be pre-fixed in the track grooves on the inner side plates. The fixed tracks are riveted and fixed to the track grooves. This riveting fixing method requires a lot of rivets to be fixed on the inner side plates, and the installation efficiency is very low. Moreover, the rivets penetrate the inner and outer surfaces of the inner side plates. If the rivets are poorly formed, such as being skewed, or there are gaps, it is easy to cause a decrease in the heat preservation performance of the container, and the absorption of water vapor in the heat preservation cavity will also cause an increase in the self-weight of the box, thus ultimately reducing the weight of the transported goods accordingly. Summary of the Invention

[0005] The purpose of the utility model is to provide an orbital installation structure and a container to solve the problems in the prior art that during the connection and fixation of the fixed tracks for fixing goods in the existing containers to the inner side plates of the containers, there are problems such as low installation efficiency, easy existence of gaps in rivet fixation, resulting in a decrease in the heat preservation performance of the container and an increase in the self-weight.

[0006] To achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions to be realized:

[0007] In one aspect, the utility model proposes an orbital installation structure, which includes:

[0008] An orbital back plate;

[0009] A connecting end, which is formed at least at one end of the orbital back plate. An inner side plate slot and an orbital slot are formed on the connecting end; the depth direction of the inner side plate slot is perpendicular to the orbital back plate, and the opening direction of the inner side plate slot faces away from the orbital back plate; the depth direction of the orbital slot is parallel to the orbital back plate, and the opening direction of the orbital slot faces away from the inner side plate slot.

[0010] In some embodiments of the present application, the two ends of the track backplane are respectively provided with a first connection end and a second connection end, and the first connection end and the second connection end are located on the same side of the track backplane, and the first connection end and the second connection end are symmetrically arranged.

[0011] In some embodiments of the present application, both the first connection end and the second connection end include a first slot vertical plate and a second slot vertical plate perpendicular to the track backplane, and the inner side plate slot is formed between the first slot vertical plate and the second slot vertical plate.

[0012] In some embodiments of the present application, the first connection end and the second connection end include an inner slot vertical plate and an outer slot vertical plate parallel to the track backplane. The inner slot vertical plate and the outer slot vertical plate are both formed on the second slot vertical plate. The inner slot vertical plate is located on the side close to the track backplane, and the track slot is formed between the inner slot vertical plate and the outer slot vertical plate. The two track slots are used for connecting and fixing the tracks.

[0013] In some embodiments of the present application, a guiding portion that tapers in the direction close to the track backplane is formed at the opening position of the inner side plate slot.

[0014] On the other hand, the present application also proposes a container, including a box body and the track installation structure described in any one of the above.

[0015] In some embodiments of the present application, the box body includes an inner side plate and an outer side plate, and a heat preservation inner cavity is formed between the inner side plate and the outer side plate; the inner side plate encloses an inner cavity of the box body, and at least one installation groove portion is respectively formed on the inner side plates located on both sides of the inner cavity of the box body, and the track installation structure is arranged in the installation groove portion.

[0016] In some embodiments of the present application, the installation groove portion is formed between an upper side plate and a lower side plate, and the upper side plate and the lower side plate are both formed with insertion portions extending towards the outer side plate, and the insertion portions are connected to the inner side plate slots.

[0017] In some embodiments of the present application, the thickness of the insertion portion is less than the height of the inner side plate slot, and a fastener is further arranged between the insertion portion and the second slot vertical plate.

[0018] In some embodiments of the present application, anti-slip surfaces are formed on the upper end surface, lower end surface and outer end surface of the fastener, and sealant is further arranged on the outside of the fastener.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are:

[0020] The track installation structure involved in this application is installed in the installation groove formed between the upper side plate and the lower side plate. An inner side plate slot and a track slot are formed on the track installation structure. The insertion part on the upper side plate or the lower side plate is inserted into the inner side plate slot to realize the connection between the track installation structure and the inner side plate. The fixed track is inserted into the track slot to realize the connection and fixation of the fixed track, which is convenient for later fixing the goods. When fixing the goods, the horizontal strut or the strap is used to tie the goods to the fixed track.

[0021] For this track installation structure, the connections with the inner side plate and the fixed track both adopt the insertion method, without the need for fixing parts such as rivets for fixation, which is beneficial to improving the installation efficiency. Moreover, it does not need to penetrate the inner side plate, so the sealing and heat preservation performance of the container is higher, avoiding the increase in self-weight, ensuring the carrying weight and the storage effect during transportation.

[0022] After reading the specific implementation manners of the present utility model in conjunction with the drawings, other features and advantages of the present utility model will become clearer. Description of the Drawings

[0023] 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 also be obtained based on these drawings.

[0024] Figure 1 is a schematic diagram of the position of the track installation structure proposed by the present utility model in the container;

[0025] Figure 2 is a schematic diagram of the track installation structure;

[0026] Figure 3 is a schematic cross-sectional view of the installation of the track installation structure and the fixed track in the container;

[0027] Figure 4 is Figure 3 an enlarged schematic view of part A in;

[0028] Figure 5 is a cross-sectional view of the track installation structure;

[0029] Figure 6 is Figure 5 an enlarged schematic view of part B in;

[0030] Figure 7 is a schematic diagram of the fastener structure;

[0031] In the figure,

[0032] 100, Box body; 101, Inner cavity of the box body; 110, Outer side plate; 120, Inner side plate; 121, Upper side plate; 122, Lower side plate; 123, Insertion part;

[0033] 200, Fixed track;

[0034] 300, Track installation structure; 310, Track back plate; 320, First connection end; 330, Second connection end;

[0035] 301, First slot vertical plate; 3011, Bent vertical plate; 302, Second slot vertical plate; 303, Outer slot vertical plate; 304, Inner slot vertical plate; 305, Inner side plate slot; 306, Track slot; 307, Guide part;

[0036] 400, Fastener; 410, Fastening front end; 420, Upper end face; 430, Lower end face; 440, Outer end face;

[0037] 500, Sealant. Detailed implementation mode

[0038] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0039] In the description of the present application, 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 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 should not be construed as a limitation to the present application.

[0040] 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. In the description of the present application, unless otherwise stated, the meaning of "plurality" is two or more.

[0041] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0043] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0044] Reference Figure 1 , the present application proposes an orbital mounting structure 300 and a container. The container includes a box body 100, and a box inner cavity 101 for containing goods is formed inside the box body 100.

[0045] The box body 100 specifically includes an outer side plate 110 and an inner side plate 120. The outer side plate 110 is formed on the surface of the box body 100, and the inner side plate 120 is arranged on the periphery of the box inner cavity 101. That is, the inner side plate 120 and the top plate, bottom plate, etc. enclose the box inner cavity 101.

[0046] For an insulated container, a thermal insulation inner cavity is formed between the outer side plate 110 and the inner side plate 120 for accommodating thermal insulation materials such as a foaming layer.

[0047] The orbital mounting structure 300 is arranged on the inner side plates 120 on the left and right sides of the box inner cavity 101, and the orbital mounting structures 300 are arranged oppositely on the inner side plates 120 on the left and right sides to facilitate fixing from both sides by a horizontal strut or a lashing strap.

[0048] ReferenceFigures 2 - 4 The track mounting structure 300, as an intermediate connection structure between the fixed track 200 and the box body 100, connects the fixed track 200 to the inner side plate 120 of the box body 100, facilitating the connection and fixation of the horizontal crossbar or the lashing strap.

[0049] In other words, the track mounting structure 300 is fixed to the inner side plate 120, and then, the fixed track 200 for directly connecting and fixing with the horizontal crossbar or the lashing strap is connected to the track mounting structure 300.

[0050] At least one mounting groove portion is respectively formed on the inner side plates 120 on both sides of the inner cavity 101 of the box body, and the track mounting structure 300 is arranged in the mounting groove portion.

[0051] The mounting groove portion extends horizontally on the inner side plate 120 and extends along the length direction of the inner side plate 120 (i.e., the length direction of the inner cavity 101 of the box body).

[0052] The number of mounting groove portions on the inner side plate 120 is at least one.

[0053] Alternatively, two or more mounting groove portions are arranged at intervals along the height direction of the inner side plate 120.

[0054] Correspondingly, the track mounting structure 300 is arranged in each mounting groove portion to provide multiple layers of fixation in the height direction of the inner cavity 101 of the box body.

[0055] Specifically, the inner side plate 120 is divided into an upper side plate 121 and a lower side plate 122, that is, the mounting groove portion is formed between the upper side plate 121 and the lower side plate 122.

[0056] The track mounting structure 300 includes a track back plate 310 and a connecting end portion for connecting with the inner side plate 120 and the fixed track 200.

[0057] The track mounting structure 300 extends along the length direction of the inner cavity 101 of the box body, and the connecting end portion is formed at least at one end of the track back plate 310, that is, at least at the upper end or the lower end of the track back plate 310.

[0058] The track mounting structure 300 is connected to the corresponding upper side plate 121 and / or lower side plate 122 through the connecting end portion.

[0059] The track mounting structure 300 is connected to the corresponding position of the fixed track 200 through the connecting end portion.

[0060] Reference Figure 5 、 Figure 6, Specifically, in order to improve the connection stability, in some embodiments of the present application, connection ends are respectively provided at the upper and lower ends of the track backplane 310, defined as the first connection end 320 and the second connection end 330 respectively.

[0061] The first connection end 320 and the second connection end 330 are located on the same side of the track backplane 310, and the first connection end 320 and the second connection end 330 are symmetrically arranged.

[0062] Specifically, the first connection end 320 and the second connection end 330 are respectively located on the side of the track backplane 310 facing away from the outer side plate 110 to facilitate fixing the connection of the track 200 with the horizontal strut or the binding strap.

[0063] The first connection end 320 is connected to the upper side plate 121, the second connection end 330 is connected to the lower side plate 122, and the fixed track 200 is connected between the first connection end 320 and the second connection end 330.

[0064] Inner side plate slots 305 and track slots 306 are formed on the connection ends; the depth direction of the inner side plate slots 305 is perpendicular to the track backplane 310, and the opening direction of the inner side plate slots 305 faces away from the track backplane 310 for connecting with the upper side plate 121 or the lower side plate 122.

[0065] The depth direction of the track slots 306 is parallel to the track backplane 310, and the opening direction of the track slots 306 faces away from the inner side plate slots 305.

[0066] That is, the opening directions of the track slots 306 on the first connection end 320 and the second connection end 330 are oppositely arranged, and the upper and lower ends of the fixed track 200 are respectively inserted into the track slots 306 of the first connection end 320 and the second connection end 330.

[0067] The inner side plate slots 305 are formed between the first slot vertical plate 301 and the second slot vertical plate 302.

[0068] Both the first connection end 320 and the second connection end 330 include a first slot vertical plate 301 and a second slot vertical plate 302 perpendicular to the track backplane 310.

[0069] A bent vertical plate 3011 extending away from the second slot vertical plate 302 is formed on the first slot vertical plate 301.

[0070] Both the upper side plate 121 and the lower side plate 122 are formed with insertion portions 123 extending towards the outer side plate 110, and each insertion portion 123 is connected to the inner side plate slots 305 on the first connection end 320 and the second connection end 330.

[0071] In the installed state, the bent vertical plate 3011 is in contact connection with the inner side of the upper side plate 121 or the lower side plate 122, playing a role in limiting and positioning, and the connection is more stable. At the same time, the bent vertical part can also increase the contact area with the upper side plate 121 or the lower side plate 122, avoiding problems such as stress concentration.

[0072] Reference Figure 4 、 Figure 7 , the height of the inner side plate slot 305 is greater than the thickness of the insertion part 123. After the insertion part 123 is inserted into the inner side plate slot 305, a fastener 400 is inserted from the opening position of the inner side plate slot 305 to seal the gap between the insertion part 123 and the inner side plate slot 305, so that the connection between the insertion part 123 and the inner side plate slot 305 is stable.

[0073] For the convenience of positioning, in some embodiments of the present application, a guiding part 307 that tapers along the direction close to the track back plate 310 is formed at the opening position of the inner side plate slot 305.

[0074] The section of the guiding part 307 is similar to a flared opening, which plays a guiding role when the insertion part 123 and the fastener 400 are connected.

[0075] The fastener 400 is made of a non-metallic material and has a certain compression amount itself. The sum of the thickness H2 of the fastener 400 and the thickness T1 of the insertion part 123 is not less than the height H1 of the inner side plate slot 305 to achieve the stability of the connection between the insertion part 123 and the inner side plate slot 305.

[0076] The length of the fastener 400 is adapted to the length of the inner side plate slot 305, and the width W2 of the fastener 400 is less than the depth W1 of the inner side plate slot 305.

[0077] A tapered fastening front end 410 is formed on the fastener 400, which is more convenient for positioning during insertion.

[0078] Anti-slip surfaces are formed on the upper end surface 420, the lower end surface 430 and the outer end surface 440 of the fastener 400.

[0079] The anti-slip surface is wavy, which is used to increase the friction between the fastener 400 and the inner side plate slot 305 and the upper side plate 121 or the lower side plate 122.

[0080] After the fastener 400 is completed, a sealant 500 can also be provided on the outside of the fastener 400. The wavy anti-slip surface of the outer end surface 440 of the fastener 400 is beneficial to increasing the friction with the sealant 500, improving the fastening degree of the connection of the sealant 500, and reducing the generation of connection gaps.

[0081] The track slots 306 are formed between the inner slot vertical plate 304 and the outer slot vertical plate 303, and the space between the two track slots 306 is used to connect and fix the fixed track 200.

[0082] Specifically, the first connection end 320 and the second connection end 330 include the inner slot vertical plate 304 and the outer slot vertical plate 303 parallel to the track back plate 310, and both the inner slot vertical plate 304 and the outer slot vertical plate 303 are formed on the second slot vertical plate 302.

[0083] Both the inner slot vertical plate 304 and the outer slot vertical plate 303 extend away from the first slot vertical plate 301, and the inner slot vertical plate 304 is located on the side closer to the track back plate 310.

[0084] The fixed track 200 is inserted into the track slots 306 from one end of the track mounting structure, and the upper edge and the lower edge of the fixed track 200 are respectively inserted into the track slots 306 on the first connection end 320 and the second connection end 330.

[0085] The distance L1 between the track slots 306 and the track back plate 310 satisfies that during installation, the fixed track 200 does not interfere with the track back plate 310.

[0086] The outer end face of the outer slot vertical plate 303 is located inside the upper side plate 121 and the lower side plate 122. In other words, the distance between the outer wall of the outer slot vertical part and the track back plate 310 is less than the distance between the track back plate 310 and the outer surface of the inner side plate 120, so as to avoid interference of the track mounting structure 300 with the cargo loading.

[0087] At the upper and lower ends of the track back plate 310, there are formed extended outer edges extending to the outside of the first connection end 320 and the second connection end 330, which is convenient for increasing the bonding performance between the track back plate 310 and the foaming layer. When the fixed track 200 is in the working stress state, the load is transmitted to the track back plate 310, improving the stability of the track back plate 310.

[0088] At the same time, a wavy surface is also provided on the side of the track back plate 310 facing the outer side to increase the bonding force with the foaming layer.

[0089] During installation, when the inner side plates 120 are connected to each other to form the inner cavity 101 of the box, the track mounting structure 300 is connected to the inner side plates 120, and the insertion parts 123 on the upper side plate 121 and the lower side plate 122 are inserted into the corresponding inner side plate slots 305, and then the outer side plate 110 is assembled.

[0090] Insert the fixed track 200 into the track slots 306 from the rear side of the container to complete the connection and fixation between the fixed track 200 and the track mounting structure 300.

[0091] Finally, when assembling the goods, they are fixed on the fixed tracks 200 on both sides through horizontal struts or lashing straps to further limit the goods and prevent the goods from shaking during transportation, which may cause damage to the goods.

[0092] The track installation structure 300 involved in this application is installed in the installation groove formed between the upper side plate 121 and the lower side plate 122. The inner side plate slot 305 and the track slot 306 are formed on the track installation structure 300. The insertion part 123 on the upper side plate 121 or the lower side plate 122 is inserted into the inner side plate slot 305 to realize the connection between the track installation structure 300 and the inner side plate 120; the fixed track 200 is inserted into the track slot 306 to realize the connection and fixation of the fixed track 200, which is convenient for later fixing the goods. The horizontal strut or lashing strap can tie the goods to the fixed track 200.

[0093] For the track installation structure 300, the connections with the inner side plate 120 and the fixed track 200 both adopt the insertion method, without the need for fixing parts such as rivets for fixation, which is beneficial to improving the installation efficiency. And it does not need to penetrate the inner side plate 120, so the sealing and heat preservation performance of the container is higher, avoiding the increase of self-weight, ensuring the carrying weight and the storage effect during transportation.

[0094] In the description of the above embodiments, the specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0095] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. An orbital mounting structure, characterized in that, Comprising: Track backplane; A connecting end portion, which is formed at least at one end of the track backplane, and an inner plate slot and a track slot are formed on the connecting end portion; the depth direction of the inner plate slot is perpendicular to the track backplane, and the opening direction of the inner plate slot faces away from the track backplane; the depth direction of the track slot is parallel to the track backplane, and the opening direction of the track slot faces away from the inner plate slot.

2. The track mounting structure according to claim 1, wherein A first connecting end portion and a second connecting end portion are respectively provided at both ends of the track backplane, and the first connecting end portion and the second connecting end portion are located on the same side of the track backplane, and the first connecting end portion and the second connecting end portion are symmetrically arranged.

3. The track mounting structure according to claim 2, wherein Both the first connecting end portion and the second connecting end portion include a first slot vertical plate and a second slot vertical plate perpendicular to the track backplane, and the inner plate slot is formed between the first slot vertical plate and the second slot vertical plate.

4. The track mounting structure according to claim 3, wherein The first connecting end portion and the second connecting end portion include an inner slot vertical plate and an outer slot vertical plate parallel to the track backplane, the inner slot vertical plate and the outer slot vertical plate are both formed on the second slot vertical plate, the inner slot vertical plate is located on the side close to the track backplane, the track slot is formed between the inner slot vertical plate and the outer slot vertical plate, and the two track slots are used for connecting and fixing the track.

5. The track mounting structure according to claim 1, wherein A guiding portion that tapers in a direction close to the track backplane is formed at the opening position of the inner plate slot.

6. A container, comprising a box body, characterized in that, It further includes the track mounting structure involved in any one of the above claims 1-5.

7. The container according to claim 6, wherein The box body includes an inner plate and an outer plate, and a heat preservation inner cavity is formed between the inner plate and the outer plate; the inner plate encloses an inner cavity of the box body, and at least one mounting groove portion is respectively formed on the inner plates on both sides of the inner cavity of the box body, and the track mounting structure is arranged in the mounting groove portion.

8. The container according to claim 7, wherein The mounting groove portion is formed between an upper side plate and a lower side plate, and the upper side plate and the lower side plate are both formed with a plug-in portion extending towards the outer plate direction, and the plug-in portion is connected to the inner plate slot.

9. The container according to claim 8, wherein The thickness of the plug-in portion is smaller than the height of the inner plate slot, and a fastener is further arranged between the plug-in portion and the second slot vertical plate.

10. The container according to claim 9, wherein Anti-slip surfaces are formed on the upper end surface, lower end surface and outer end surface of the fastener, and a sealant is further arranged on the outer side of the fastener.