A multi-tiered logistics shelving structure

Abstract

The present application relates to the technical field of logistics shelves, and particularly relates to a multi-layer logistics shelf structure; comprising multiple groups of support assemblies, each group being composed of two columns symmetrically arranged in front and back, the columns being in concave structures, a connecting part being arranged between the columns in the same group, a supporting part of a ladder structure being arranged between the two groups of support assemblies, and a column clamp in L-shaped structure being arranged at the four ends of the supporting part and being clamped with the columns; a reinforcing mechanism being arranged on the columns and the supporting part; through the linkage reinforcing mechanism composed of a limiting tube, a positioning block, a wedge-shaped block and the like, and the detachable supporting part, the present application achieves the safety and convenient replacement of the damaged supporting part, and solves the technical problems of poor structural strength of the traditional shelves and difficulty in reloading due to the deformation of the columns during replacement of the parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of logistics shelves, in particular to a multi-layer logistics shelf structure. BACKGROUND

[0002] The multi-layer logistics shelf is a key equipment in the modern warehousing system, and its core purpose is to realize high-density and large-scale storage of goods by utilizing the vertical space of the warehouse, thereby significantly improving the space utilization and warehousing management efficiency of the warehouse. The multi-layer logistics shelf is mainly composed of basic components such as columns, beams, layer plates, and various connecting and stabilizing components. The column is the core load-bearing framework, the beam is connected to the column through the column clamp to form the storage layer, and the layer plate is laid on the beam to directly bear the goods. In order to ensure the overall stability, pull rods need to be installed between the shelf pieces and fixed to the ground through foundation bolts.

[0003] However, there are the following problems in the process of assembling and using the shelf: first, the column and the beam are connected through the clamping connection and fixed through the insertion of the locking pin, and there is no connection between the adjacent beams, and the overall structural strength is not good. Secondly, when replacing the damaged layer plate and beam after assembly, the column position may be deformed due to the lack of support under the condition of heavy load of goods. When the beam is installed again, the distance between the columns changes, making it difficult to install and replace the beam.

[0004] Therefore, the poor connection stability of the beam and the column and the possible deformation of the column when replacing the components are technical problems that need to be solved by those skilled in the art. SUMMARY

[0005] In view of the above problems, the present application provides a multi-layer logistics shelf structure to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: the multi-layer logistics shelf structure provided by the embodiment of the present application comprises a plurality of support assemblies, each of which is composed of two columns symmetrically arranged in front and back. The column has a concave structure, and a connecting portion is arranged between the columns in the same group. A supporting portion of the ladder structure is arranged between the two support assemblies, and an L-shaped column clamp that is capable of being clamped with the column is arranged at four ends of the supporting portion. A reinforcing mechanism is arranged on the column and the supporting portion.

[0007] The reinforcing mechanism comprises grooves arranged on the left and right sides of the column, and a limiting tube is arranged on the top of the column clamp and slidably installed in the corresponding groove. Except for the uppermost limiting tube, an extension piece is arranged on each of the remaining limiting tubes. A fixed plate is fixedly installed on the two columns in the same group. A stop block and two positioning blocks are fixedly installed on the column clamp. A rectangular hole corresponding to the positioning block is arranged on the limiting tube.

[0008] Supporting parts are arranged between the cross beams and the columns, the supporting parts comprise fixing seats, four groups of bases are arranged between the adjacent two groups of supporting components, the bases are detachably installed on the corresponding columns, supporting rods are hingedly connected to the bases, and the other ends of the supporting rods are in plug-in cooperation with the supporting parts.

[0009] During installation, the supporting parts are moved downward by the upper supporting parts, the rectangular holes are vertically limited by the positioning blocks, during replacement, the supporting parts constitute temporary support and stabilize the columns after the layer to be replaced, the limiting pipes are unlocked to be safely replaced.

[0010] As a preferred scheme, the supporting parts comprise cross beams arranged between two columns opposite to each other, column clamps are fixedly installed at the two ends of the cross beams, a plurality of cross beams are fixedly installed between the two cross beams opposite to each other, two rows of limiting holes are formed in the opposite faces of the two columns, and a pair of clamping tongues are arranged on the column clamps and in plug-in cooperation with the limiting holes.

[0011] As a preferred scheme, the telescopic parts comprise sliding blocks fixedly installed at the upper ends of the limiting pipes, sliding sleeves are slidably sleeved on the sliding blocks, bolts are threadedly connected between the sliding blocks and the sliding sleeves, through holes are formed in the sliding blocks, and the bolts are threadedly connected to the corresponding limiting pipes and penetrate through the corresponding through holes.

[0012] As a preferred scheme, a first plug block in plug-in cooperation with the sliding sleeves is arranged at the lower end of each positioning block except the lowermost positioning block, and two first plug blocks in plug-in cooperation with the corresponding uppermost limiting pipes are arranged at the lower end of the fixed plate.

[0013] As a preferred scheme, a pair of circular holes are formed in the sliding sleeves, a plurality of mounting holes are formed in the two grooves of the column, and a pair of column bodies slidingly penetrating through the corresponding circular holes and the mounting holes are fixedly installed on the base.

[0014] As a preferred scheme, the positioning blocks are in L-shaped structure, an inclined surface is arranged at the upper end of the vertical section of the positioning block, and a wedge-shaped block in cooperation with the inclined surface of the positioning block is arranged in the limiting pipe.

[0015] As a preferred scheme, a pair of ear plates are fixedly installed at the positions corresponding to the columns at the lower end of the fixed plate, and the ear plates are fixedly connected to the columns after being slidably inserted into the columns.

[0016] As a preferred scheme, a second plug block is fixedly installed at the upper end of each positioning block, and the second plug block is slidably inserted into the corresponding limiting pipe.

[0017] As a preferred scheme, two pairs of front-rear symmetrical fixing seats are arranged on the supporting parts, a shaft column is fixedly installed at the end of the supporting rod away from the base, a connecting seat is arranged at the other end of the supporting rod, the shaft column movably penetrates through the connecting seat, and a plug rod in plug-in cooperation with the fixing seat is fixedly installed on the connecting seat.

[0018] The one or more technical solutions in the embodiments of the present application have at least one of the following technical effects: first, the linkage type reinforcing mechanism composed of the limiting tube, the positioning block, the wedge-shaped block and the like, and the detachable support part are cooperated together, not only the overall structural strength and stability of the shelf under static load are enhanced, but also the safe and convenient replacement of the damaged support part is realized, and the technical problems of poor structural strength of the traditional shelf and difficult reassembly caused by deformation of the stand during replacement of the parts are solved.

[0019] Second, the limiting tube is driven by the downward pressure of the upper structure during installation, the rectangular hole and the horizontal section of the positioning block are in contact to realize vertical locking, and the internal wedge-shaped block and the inclined surface of the positioning block cooperate to generate horizontal locking force. This design replaces the traditional single fixing of locking pin with mechanical interlocking multi-directional limiting mode, improves the connection rigidity and reliability between the stand and the cross beam, and effectively solves the defect of poor connection strength between the stand and the cross beam.

[0020] Third, the support part can be quickly installed adjacent to the layer to be replaced, and the plug rod and the fixed seat are inserted, the base and the sliding sleeve and the stand are connected to form a temporary triangular stable support. This structure can provide effective lateral support for the stand during disassembly to prevent the distance between them from changing, and create conditions for smooth disassembly and reinstallation of the support part, thereby solving the problem of deformation of the stand caused by lack of support during replacement.

[0021] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only illustrate the embodiments of the present application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0023] Figure 1 It is a schematic view of the three-dimensional structure of the present application.

[0024] Figure 2 It is a schematic view of the three-dimensional structure of the present application. Figure 1

[0025] Figure 3 It is a schematic view of the structure of the stand of the present application.

[0026] Figure 4 It is a schematic view of the reinforcing mechanism of the present application.

[0027] Figure 5 ​Structure diagram of the support part of the present application.

[0028] Figure 6 Structure diagram between the positioning block and the wedge-shaped block of the present application.

[0029] Figure 7 Structure diagram between the column, the sliding sleeve and the stand of the present application.

[0030] Figure 8 Structure diagram between the rectangular hole and the positioning block of the present application.

[0031] Fig. 10, stand; 11, mounting hole; 12, column clamp; 13, connecting part; 130, cross pull rod; 131, inclined pull rod; 14, supporting part; 140, cross beam; 141, cross beam; 142, limiting hole; 143, clamping tongue; 2, reinforcing mechanism; 20, limiting tube; 21, sliding block; 22, sliding sleeve; 23, bolt; 24, fixed plate; 240, ear plate; 120, stop block; 25, positioning block; 250, wedge-shaped block; 3, support part; 30, fixed seat; 31, base; 310, column; 32, support rod; 320, shaft column; 33, connecting seat; 34, insertion rod; 4, No. 1 insertion block; 5, No. 2 insertion block. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0033] As shown in Figure 1 , Figure 2 and Figure 3 , a multi-layer logistics shelf structure, comprising a plurality of groups of support assemblies arranged from left to right, each group of support assemblies consisting of two symmetrical columns 10, the two columns 10 in the same group are in an open and opposite concave structure, a connecting part 13 is arranged between the front and rear two columns 10, a supporting part 14 of a ladder structure is arranged between the two groups of support assemblies, and the four ends of the supporting part 14 are provided with column clamps 12 which are in L-shaped structure and are in clamping cooperation with the columns 10; the columns 10 and the supporting part 14 are jointly provided with a reinforcing mechanism 2.

[0034] As shown in Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the reinforcing mechanism 2 includes grooves opened on both sides of the column 10, and the upper part of the column clamp 12 is provided with a limiting tube 20 slidingly installed in the corresponding groove. Except for the uppermost limiting tube 20, the upper end of the remaining limiting tubes 20 is fixedly installed with a sliding block 21, and the sliding block 21 is slidingly sleeved with a sliding sleeve 22, and the sliding sleeve 22 is slidingly installed in the corresponding groove. The sliding block 21 and the sliding sleeve 22 are threadedly connected with a bolt 23. The upper ends of the two columns 10 in the same group are fixedly installed with a fixed plate 24, and the lower end of the fixed plate 24 is in contact with the uppermost limiting tube 20. The column clamp 12 is fixedly installed with a stop block 120 in contact with the upper end of the corresponding sliding sleeve 22. Two positioning blocks 25 are fixedly installed on one side of the longitudinal section of the column clamp 12 close to the corresponding column 10. Rectangular holes corresponding to the positioning blocks 25 are opened on the limiting tube 20.

[0035] As shown in Figure 1 , Figure 2 and Figure 5 , the support part 3 is arranged between the cross beam 140 and the column 10, and the support part 3 includes a fixed seat 30. Two pairs of front and rear symmetrical fixed seats 30 are arranged on the supporting part 14. The fixed seat 30 is provided with a insertion hole. Four groups of bases 31 are arranged between the adjacent two groups of support assemblies. Each group of bases 31 is detachably installed on the corresponding sliding sleeve 22. The base 31 is hingedly connected with a support rod 32. The other end of the support rod 32 is movably installed with a connecting seat 33. The connecting seat 33 is fixedly installed with an insertion rod 34 inserted and matched with the insertion hole.

[0036] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the supporting part 14 includes a cross beam 140 arranged between two columns 10 opposite to each other. The column clamp 12 is fixedly installed at both ends of the cross beam 140. A plurality of cross beams 141 are fixedly installed between the front and rear cross beams 140, rigidly connecting the front and rear cross beams 140 into a whole frame, enhancing the stability of the single-layer structure. Two rows of limiting holes 142 are opened on the opposite sides of the two columns 10. A pair of clamping tongues 143 inserted and matched with the limiting holes 142 are fixedly installed on one side of the transverse section of the column clamp 12 close to the corresponding column 10.

[0037] As shown in Figure 1 and Figure 5 , the connecting part 13 includes two horizontal tie rods 130 fixedly installed between the two columns 10 opposite to each other. A plurality of diagonal tie rods 131 are fixedly installed between the two columns 10 and between the two horizontal tie rods 130. The diagonal tie rods 131 and the columns 10 form a plurality of stable triangular structures, enhancing the ability of the support assembly to resist lateral deformation and providing overall strength support for the shelf.

[0038] AsFigure 6 As shown, the positioning block 25 has an L-shaped structure, and the upper end of the vertical section of the positioning block 25 is provided with an inclined surface. The limiting tube 20 is provided with a wedge block 250 that cooperates with the inclined surface of the positioning block 25.

[0039] like Figures 1 to 7 As shown, in specific operations, the horizontal tie rod 130 and the diagonal tie rod 131 are fixedly installed between the two columns 10. Then, the positioning lines are laid out on the ground to clarify the installation position of the columns 10. Subsequently, the support assembly with the connecting part 13 is fixedly installed at the corresponding position on the ground. Then, the crossbeams 140 are installed sequentially from bottom to top. After the crossbeams 140 are moved to the required height, the latch 143 is moved to the upper part of the limiting hole 142 at the corresponding height, and the positioning block 25 is inserted into the rectangular hole of the corresponding limiting tube 20. Then, the crossbeams 140 are moved down so that the latch 143 is inserted into the corresponding limiting hole 142 to complete the initial installation of the crossbeams 140. Then, multiple span beams 141 are fixedly installed between the two crossbeams 140 that are opposite each other.

[0040] Next, the next set of support parts 14 is installed. Since the slider 21 is fixedly connected to the corresponding sliding sleeve 22 by the bolt 23 in the initial state, the stop 120 on this set of support parts 14 will push the limiting tube 20 downward through the sliding sleeve 22, bolt 23, and slider 21. The inner wall of the rectangular hole of the limiting tube 20 is in close contact with the horizontal section of the positioning block 25, thus locking the crossbeam 140 in the vertical direction. At the same time, the inclined surface of the wedge block 250 in the limiting tube 20 cooperates with the inclined surface of the vertical section of the positioning block 25 to generate a horizontal locking force, effectively restricting the left and right movement of the crossbeam 140. The shaking ensures that each layer of support 14 is stable and reliable after installation. The remaining support 14 are then installed in this way. After the last set of support 14 is installed, the fixing plate 24 is installed. The ear plate 240 on the fixing plate 24 is inserted into the corresponding column 10 until the lower end of the fixing plate 24 abuts against the upper end of the column 10. During the movement of the fixing plate 24, it will push the uppermost limiting tube 20 downward to lock the last installed support 14. The fixing plate 24 is then fixedly installed on the corresponding column 10, thereby achieving quick and effective limiting of all support 14.

[0041] When one of the support parts 14 is damaged and needs to be replaced, in order to avoid direct disassembly causing the column 10 to deform and lose stability, the support part 3 is first moved to the position of the sliding sleeve 22 adjacent to the support part 14 of the layer to be replaced, and the base 31 is connected with the corresponding sliding sleeve 22 and the column 10, then the connecting seat 33 is moved, the insertion rod 34 is inserted into the fixing seat 30 on the support part 14 adjacent to the support part 14 of the layer to be replaced, thereby forming a temporary triangular stable support below the layer to be replaced, effectively bearing the load, preventing the distance between the columns 10 from changing during disassembly, and solving the problem that the column 10 deforms during replacement of the parts of the shelf, making it difficult to reassemble. Then the bolt 23 is removed, the limiting tube 20 is moved upward, the sliding block 21 slides in the sliding sleeve 22, and the rectangular hole side wall on the limiting tube 20 does not interfere with the positioning block 25, then the cross beam 141 is disassembled, the cross beam 140 is moved upward, the clamping tongue 143 is disengaged from the corresponding limiting hole 142, and the disassembly of the support part 14 is completed. Then, according to the above operation, the replacement of the support beam is carried out.

[0042] As shown in Figure 5 , Figure 6 and Figure 8 , except for the lowermost positioning block 25, the remaining positioning blocks have a one-way plug 4 inserted into the sliding sleeve 22, and the lower end of the fixed plate 24 also has two one-way plugs 4 inserted into the corresponding uppermost limiting tube 20. The insertion of the one-way plug 4 effectively limits the forward, backward, left and right movement of the sliding sleeve 22 and the limiting tube 20, enhancing the overall stability of the structure.

[0043] As shown in Figure 5 , Figure 6 and Figure 8 , the positioning block 25 has an L-shaped structure, and the upper end of the vertical section of the positioning block 25 is provided with an inclined surface, and the limiting tube 20 is provided with a wedge-shaped block 250 matched with the inclined surface of the positioning block 25. The wedge-shaped block 250 is the key to automatic locking of the cross beam 140 in the horizontal direction, ensuring the tightness of the connection between the cross beam 140 and the column 10.

[0044] As shown in Figure 3 and Figure 8 , the lower end of the fixed plate 24 is fixedly installed with a pair of ear plates 240 corresponding to the position of the column 10, and the ear plate 240 is fixedly connected with the column 10 after being slidably inserted into the column 10.

[0045] As shown in Figure 6 and Figure 8 , the upper end of the positioning block 25 is fixedly installed with a two-way plug 5, which is slidably inserted into the corresponding limiting tube 20. The two-way plug 5 further limits the movement of the limiting tube 20, and together with the one-way plug 4, it forms multiple stable constraints.

[0046] As shown in Figure 2 , Figure 5, Figure 6 and Figure 8 As shown, during operation, as the crossbeam 140 moves downward to insert the latch 143 into the corresponding limiting hole 142, the first insert block 4 is inserted into the corresponding sliding sleeve 22 to restrict the forward, backward, left, and right movement of the sliding sleeve 22. Then, the stop block 120 abuts against the upper end of the sliding sleeve 22, pushing the corresponding limiting tube 20 downward through the sliding sleeve 22, bolt 23, and slider 21. This causes the inner wall of the rectangular hole on the limiting tube 20 to abut against the horizontal section of the positioning block 25, thus restricting the vertical movement of the crossbeam 140. Simultaneously, the inclined surface of the wedge block 250 abuts against the inclined surface of the positioning block 25, restricting the left and right movement of the crossbeam 140. The lower end of the limiting tube 20 abuts against the upper end of the corresponding stop block 120, and the second insert block 5 is inserted into the corresponding limiting tube 20 to further restrict the forward, backward, left and right movement of the limiting tube 20. In summary, through the vertical limiting of the rectangular hole, the horizontal locking of the wedge block 250, and the coordinated stabilization of the first insert block 4 and the second insert block 5, multi-directional automatic locking is achieved.

[0047] When the limit needs to be released, first support the adjacent support part 14 through the support part 3 to reduce the force at that point, then remove the corresponding bolt 23, then move the slider 21 and the limit tube 20 upwards so that the limit tube 20 is disengaged from the second insert block 5. The rectangular hole and the wedge block 250 then release the pressure on the positioning block 25. Then, the support part 14 at that point is disassembled and replaced. After replacement, the limit tube 20 is moved downwards, and the second insert block 5 is inserted into the limit tube 20. The side wall of the rectangular hole and the wedge block 250 abut against and limit the positioning block 25. Then, the bolt 23 passes through the sliding sleeve 22 and the slider 21 and is fixed on the sliding sleeve 22 so that the sliding sleeve 22, the slider 21 and the limit tube 20 form a fixed length structure to ensure that the limit tube 20 limits the support part 14 at that point.

[0048] like Figure 4 , Figure 7 and Figure 8 As shown, a pair of round holes are opened on the sliding sleeve 22, and multiple mounting holes 11 are opened in the two grooves of the column 10. A pair of columns 310 that slide through the corresponding round holes and mounting holes 11 are fixedly installed on the base 31.

[0049] like Figure 4 and Figure 7 As shown, the slider 21 has a through hole, and the bolt 23 is threadedly connected to the corresponding limiting tube 20 and passes through the corresponding through hole.

[0050] like Figure 1 , Figure 2 and Figure 5 As shown, a shaft column 320 is fixedly installed at the end of the support rod 32 away from the base 31, and the shaft column 320 movably passes through the connecting seat 33.

[0051] like Figures 1 to 8As shown, in particular work, the artificial moving connecting seat 33 slides on the shaft column 320, so that the connecting seat 33 is away from the corresponding fixed seat 30, until the plug rod 34 is separated from the corresponding fixed seat 30, then the base 31 is moved away from the corresponding column 10, so that the column body 310 is separated from the column 10 and the corresponding sliding sleeve 22, and the bolt 23 is removed, the limiting tube 20 is moved up to unlock the limiting block 25, then the support part 3 is moved to the position of the sliding sleeve 22 adjacent to the support part 14 to be replaced, and the base 31 is moved, so that the column body 310 penetrates through the through hole on the sliding block 21 and the corresponding round hole on the column 10, and the limiting tube 20 keeps the state of unlocking the limiting block 25, so as to facilitate the subsequent disassembly of the cross beam 140, then the connecting seat 33 is moved, so that the plug rod 34 is inserted into the insertion hole of the fixed seat 30 corresponding to the support part 14 adjacent to the support part 14, to support the adjacent support part 14, so as to reduce the stress of the replacement position, and then the support part 14 can be replaced. In addition, when the support part 3 does not perform the replacement operation, it can be flexibly installed in the key stress area of the lower part of the shelf according to the actual bearing demand, and the installation mode can effectively optimize the stress distribution of the shelf, and preventively strengthen the main bearing part, so as to further improve the overall rigidity and bearing capacity of the shelf on the basis structure.

[0052] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each part itself.

[0053] In addition, the terms "first", "second", "one", "two" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0054] In the description of the present application, it also needs to be explained that, unless explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] The embodiments of the specific implementation are the preferred embodiments of the present application, not limited by the protection scope of the present application, so that equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A multi-layer logistics rack structure, comprising multiple sets of support components, each set of support components consisting of two symmetrical uprights, the uprights having a concave structure, a connecting part between the uprights in the same set, and a support part with a ladder structure between the two sets of support components, each support part having an L-shaped column clip at each of its four ends that engages with the uprights; characterized in that: Both the column and the support structure are equipped with a reinforcement mechanism. The reinforcement mechanism includes grooves on the left and right sides of the column, and a limiting tube that is slidably installed in the corresponding groove above the column clip. Except for the uppermost limiting tube, the other limiting tubes are equipped with telescopic parts. Fixing plates are fixedly installed on the two columns in the same group, and a stop block and two positioning blocks are fixedly installed on the column clip. Rectangular holes corresponding to the positioning blocks are opened on the limiting tubes. The supporting part includes a crossbeam between two columns that are directly opposite each other on the left and right. Column clips are fixedly installed at both ends of the crossbeam. Multiple crossbeams are fixedly installed between two crossbeams that are directly opposite each other in the front and rear. Two rows of limiting holes are opened on the left and right sides of the two columns. A pair of latches that are inserted into the limiting holes are provided on the column clip. A support is provided between the beam and the column. The support includes a fixed seat. Four sets of bases are provided between two adjacent sets of support components. The bases are detachably installed on the corresponding columns. Support rods are hinged on the bases. The other end of the support rods is inserted into the support. The telescopic component includes a slider fixedly installed on the upper end of the limiting tube. Each slider is slidably fitted with a sliding sleeve. A bolt is threadedly connected between the slider and the sliding sleeve. A through hole is opened on the slider. The bolt is threadedly connected to the corresponding limiting tube and passes through the corresponding through hole. The positioning block has an L-shaped structure, and the upper end of the vertical section of the positioning block is provided with an inclined surface. A wedge-shaped block that cooperates with the inclined surface of the positioning block is provided inside the limiting tube. Each of the support parts is provided with two pairs of symmetrical fixed seats. A shaft column is fixedly installed at one end of the support rod away from the base, and a connecting seat is provided at the other end of the support rod. The shaft column moves through the connecting seat, and a plug rod that is inserted into the fixed seat is fixedly installed on the connecting seat. During installation, the upper support part moves by pressing down the limiting tube, so that the rectangular hole and the positioning block form a vertical limit; during replacement, after the support part forms a temporary support and stable column on the layer to be replaced, the limiting tube is released from the locked state for safe replacement.

2. The multi-layer logistics rack structure according to claim 1, characterized in that: The connecting part includes two horizontal tie rods fixedly installed between two opposing columns. Multiple diagonal tie rods are fixedly installed between the two columns and between the two horizontal tie rods, forming multiple stable triangular structures between the diagonal tie rods and the columns.

3. The multi-layer logistics rack structure according to claim 2, characterized in that: Except for the bottommost positioning block, the lower ends of the other positioning blocks are equipped with No. 1 plug blocks that engage with the sliding sleeve. The lower ends of the fixing plate are also equipped with two No. 1 plug blocks that engage with the corresponding uppermost limit tube.

4. The multi-layer logistics rack structure according to claim 3, characterized in that: The sliding sleeve has a pair of round holes, and the two grooves of the column each have multiple mounting holes. A pair of columns that slide through the corresponding round holes and mounting holes are fixedly installed on the base.

5. A multi-layer logistics rack structure according to claim 1, characterized in that: Each of the lower ends of the fixing plate is fixedly installed with a pair of ear plates at positions corresponding to the columns. The ear plates are slidably inserted into the columns and fixedly connected to them.

6. A multi-layer logistics rack structure according to claim 1, characterized in that: Each positioning block has a second insertion block fixedly installed on its upper end. The second insertion block slides into the corresponding limiting tube.

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