Adjustable rack of wardrobe

US20260272167A1Pending Publication Date: 2026-09-17SHENZHEN AUTRAL TECH INNOVATION CO LTD
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Patent Information

Application Number
US19/673696
Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Priority Date
2026-04-15
Filing Date
2026-05-11
Publication Date
2026-09-17

AI Technical Summary

Technical Problem

However, during use of the adjustable rack, a problem tends to occur in that an overlapping portion between the outer frame and the inner frame is relatively small, resulting in insufficient overall strength of the adjustable rack and a tendency to bend downward after being loaded.

Benefits of technology

[0007]In the present disclosure, a longitudinal length of the frame assembly is adjustable, thereby preventing the frame assembly from bending as a whole due to an excessively small overlapping portion between the two guide rails and corresponding longitudinal side walls.

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Abstract

An adjustable rack of a wardrobe includes a frame assembly, two guide rails, anti-separation pieces, and mounting components. The frame assembly includes an outer frame and an inner frame. Both of the outer frame and the inner frame include a supporting wall, two longitudinal side walls, and two transverse side walls. The two guide rails respectively define rail grooves. The two guide rails are respectively fixed to inner sides of the two longitudinal side walls of the outer frame, so that the two longitudinal side walls of the inner frame are respectively and slidably inserted into the rail grooves. Alternatively, the two guide rails are fixed to outer sides of the two longitudinal side walls of the inner frame, so that the two longitudinal side walls of the outer frame are respectively inserted into the rail grooves. Each of the anti-separation pieces includes an abutting portion.
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Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] The present disclosure claims priority to Chinese Patent Application No. 202620511058.0, filed on April 15, 2026, which is hereby incorporated by reference herein as if set forth in its entirety.TECHNICAL FIELD

[0002] The present disclosure relates to a technical field of wardrobes, and in particular to an adjustable rack of a wardrobe.BACKGROUND

[0003] An adjustable rack of a wardrobe comprises an outer frame and an inner frame capable of sliding along a longitudinal direction of the outer frame. However, during use of the adjustable rack, a problem tends to occur in that an overlapping portion between the outer frame and the inner frame is relatively small, resulting in insufficient overall strength of the adjustable rack and a tendency to bend downward after being loaded.SUMMARY

[0004] In view of deficiencies in the prior art, an object of the present disclosure is to provide an adjustable rack of a wardrobe.

[0005] The adjustable rack comprises a frame assembly, two guide rails, anti-separation pieces, and mounting components. The frame assembly comprises an outer frame and an inner frame. Both of the outer frame and the inner frame comprise a supporting wall, two longitudinal side walls, and two transverse side walls. The two guide rails respectively define rail grooves. The two guide rails are respectively fixed to inner sides of the two longitudinal side walls of the outer frame, so that the two longitudinal side walls of the inner frame are respectively and slidably inserted into the rail grooves. Alternatively, the two guide rails are fixed to outer sides of the two longitudinal side walls of the inner frame, so that the two longitudinal side walls of the outer frame are respectively and slidably inserted into the rail grooves.

[0006] Each of the anti-separation pieces comprises an abutting portion. Each of the mounting components is fixedly connected to a corresponding anti-separation piece and a corresponding guide rail, so that an anti-separation gap is defined between a bottom end of each abutting portion and a top end of a corresponding transverse side wall of the inner frame.

[0007] In the present disclosure, a longitudinal length of the frame assembly is adjustable, thereby preventing the frame assembly from bending as a whole due to an excessively small overlapping portion between the two guide rails and corresponding longitudinal side walls.BRIEF DESCRIPTION OF DRAWINGS

[0008] FIG. 1 is a perspective schematic diagram of an adjustable rack according to a first embodiment of the present disclosure.

[0009] FIG. 2 is an exploded schematic diagram of the adjustable rack according to the first embodiment of the present disclosure.

[0010] FIG. 3 is an enlarged schematic diagram of portion B shown in FIG. 2.

[0011] FIG. 4 is a cross-sectional schematic diagram of the adjustable rack taken along a line A-A shown in FIG. 1.

[0012] FIG. 5 is a perspective schematic diagram of the adjustable rack according to a second embodiment of the present disclosure.

[0013] FIG. 6 is a perspective schematic diagram of a mounting component and an anti-separation piece according to the second embodiment of the present disclosure.

[0014] FIG. 7 is an enlarged schematic diagram of the anti-separation piece of the adjustable rack according to a third embodiment of the present disclosure.

[0015] In the drawings: 1-frame assembly; 11-outer frame; 12-inner frame; 161-longitudinal top beam; 162-longitudinal bottom beam; 163-transverse top beam; 164-transverse bottom beam; 169-longitudinal reinforcing beam; 170-supporting beam; 171-transverse reinforcing beam; 17-longitudinal side wall; 18-transverse side wall; 19-supporting wall; 2-guide rail; 21-rail groove; 22-through hole; 23-guide rail body; 24-guide rail side wall; 3-anti-separation piece; 31-abutting portion; 32-connecting portion; 33-limiting portion; 34-rotating operating portion; 39-anti-separation gap; 4-mounting component; 41-mounting hole; 9-connecting piece.DETAILED DESCRIPTION

[0016] Specific embodiments of the present disclosure are described with reference to accompanying drawings.

[0017] It should be noted that, a left-right direction in FIG. 4 is a horizontal direction, an up-down direction is a vertical direction, and a direction perpendicular to a plane of the paper is a depth direction. Accordingly, a horizontal plane is a plane defined by the horizontal direction and the depth direction, a vertical plane is a plane defined by the horizontal direction and the vertical direction.

[0018] In one embodiment, the present disclosure provides an adjustable rack. The adjustable rack comprises a frame assembly, two guide rails 2, anti-separation pieces 3, and mounting components 4.

[0019] The frame assembly comprises an outer frame 11 and an inner frame 12. Both of the outer frame 11 and the inner frame 12 define accommodating spaces. Specifically, the outer frame 11 is roughly rectangular. The outer frame 11 comprises a supporting wall 19, two longitudinal side walls 17, and two transverse side walls 18. It is readily understood that the supporting wall 19, the two longitudinal side walls 17, and the two transverse side walls 18 of the outer frame 11 are enclosed to define a first accommodating space, in which clothes or other items are placed. Of course, the outer frame 11 may be turned over, so that the supporting wall 19 of the outer frame 11 is located above the two longitudinal side walls 17 thereof, and the supporting wall 19 of the outer frame 11 is configured as a platform for placing clothes or other items. In one embodiment, each of the supporting wall 19, the two longitudinal side walls 17, and the two transverse side walls 18 of the outer frame 11 is a board structure without through holes, such as a wooden board or a steel plate, or may be a board structure with through holes (i.e., a perforated or hollowed plate). For example, the supporting wall 19 of the outer frame 11 is formed by laying supporting beams 170 of a grille shape within a rectangular frame enclosed by the two longitudinal bottom beams 162 and the two transverse bottom beams 164 of the outer frame 11. For another example, each of the longitudinal side walls 17 of the outer frame 11 is formed by welding a longitudinal reinforcing beam 169 between a longitudinal top beam 161 and a longitudinal bottom beam 162 . The longitudinal reinforcing beam 169 of each of the longitudinal side walls 17 is triangular wave-shaped. The longitudinal top beam 161 and the longitudinal bottom beam 162 of each of the longitudinal side walls 17 are parallel to each other. Each of the transverse side walls 18 of the outer frame 11 is formed by welding a transverse reinforcing beam 171 between a transverse top beam 163 and a transverse bottom beam 164. The transverse reinforcing beam 171 of each of the transverse side walls 18 is triangular wave-shaped. The transverse top beam 163 and the transverse bottom beam 164 of each of the transverse side walls 18 of the outer frame 11 are parallel to each other.

[0020] The inner frame 12 has a structure similar to the outer frame 11. Specifically, the inner frame 12 is roughly rectangular. The inner frame 12 comprises a supporting wall 19, two longitudinal side walls 17, and two transverse side walls 18. It is readily understood that the supporting wall 19, the two longitudinal side walls 17, and the two transverse side walls 18 of the inner frame 12 are enclosed to define a second accommodating space, in which clothes or other items are placed. Of course, the inner frame 12 may be turned over, so that the supporting wall 19 of the inner frame 12 is located above the two longitudinal side walls 17 thereof, and the supporting wall 19 of the inner frame 12 is configured as a platform for placing clothes or other items.

[0021] The two guide rails 2 define rail grooves 21 (for example, a cross-section of each of the guide rails 2 is substantially U-shaped to form a corresponding rail groove 21). In one embodiment, there are two rail grooves 21. For instance, each of the guide rails 2 comprises a guide rail body 23 of a substantially planar structure and two guide rail side walls 24 protruding from the guide rail body 23 thereof. For each of the guide rails 2, the two guide rail side walls 24 thereof respectively extend along two opposite edges of the guide rail body 23 thereof, and the two guide rail side walls 24 thereof intersect with the guide rail body 23 thereof to form the corresponding rail groove 21. The two guide rails 2 are respectively fixed to inner sides of the two longitudinal side walls 17 of the outer frame 11, so that the two longitudinal side walls 17 of the inner frame 12 are respectively and slidably inserted into the rail grooves 21; or the two guide rails 2 are respectively fixed to outer sides of the two longitudinal side walls 17 of the inner frame 12, so that the two longitudinal side walls 17 of the outer frame 11 are respectively and slidably inserted into the rail grooves 21. In this way, the inner frame 12 is slidable longitudinally relative to the outer frame 11. The two guide rails 2 are respectively fixed to corresponding longitudinal side walls 17 by welding, fastening with fasteners, etc.

[0022] Each of the anti-separation pieces 3 comprises an abutting portion 31. Each of the mounting components 4 is fixedly connected to a corresponding anti-separation piece 3 and a corresponding guide rail 2, so that an anti-separation gap 39 is defined between a bottom end of each abutting portion 31 and a top end of a corresponding transverse side wall 18 of the inner frame 12. A size of each anti-separation gap 39 refers to a distance in a height direction between the bottom end of each abutting portion 31 and the top end of the corresponding transverse side wall 18 of the inner frame 12.

[0023] The inner frame 12 is slidable longitudinally relative to the outer frame 11 to adjust a longitudinal length of the frame assembly 1. When the inner frame 12 is inadvertently moved excessively, each abutting portion 31 abuts against the corresponding transverse side wall 18 of the inner frame 12 to prevent the inner frame 12 from continuing to move, thereby preventing the frame assembly 1 from overall bending caused by an excessively small overlapping portion between the two guide rails 2 and the corresponding longitudinal side walls 17.

[0024] In one embodiment, each of the mounting components 4 is fixedly connected to a top end of a corresponding guide rail 2 and defines a mounting hole 41. For instance, each of the mounting components 4 and the corresponding guide rail 2 are integrally formed. Each of the anti-separation pieces 3 further comprises a connecting portion 32 fixedly connected to the abutting portion 31 thereof. Each connecting portion 32 is embedded in a corresponding mounting hole 41, so that each of the mounting components 4 is fixedly connected to a corresponding anti-separation piece 3 and the corresponding guide rail 2.

[0025] In one embodiment, each of the anti-separation pieces 3 further comprises a limiting portion 33 fixedly connected to the connecting portion 32 thereof. Each abutting portion 31 is elastic, and a cross-sectional area thereof gradually increases from bottom to top. In other words, for each of the anti-separation pieces 3, the cross-sectional area of the abutting portion 31 thereof gradually decreases in a direction away from the connecting portion 32 thereof. For example, for each of the anti-separation pieces 3, the abutting portion 31 thereof is conical, a projection of the connecting portion 32 thereof in the horizontal plane is completely within a projection of the abutting portion 31 thereof in the horizontal plane, and the projection of the connecting portion 32 thereof in the horizontal plane is completely within a projection of the limiting portion 33 thereof in the horizontal plane. A thickness of each connecting portion 32 is greater than a thickness of each of the mounting components 4. Generally, each of the anti-separation pieces 3 is an integrally formed injection-molded part. During a process of inserting the inner frame 12 into the outer frame 11, each abutting portion 31 does not obstruct the inner frame 12. After each of the transverse side walls 18 of the inner frame 12 passes a corresponding mounting hole 41, each abutting portion 31 is compressed into the corresponding mounting hole 41 and then passes through the corresponding mounting hole 41, so that each of the anti-separation pieces 3 is fixed to a corresponding mounting component 4. At this time, the limiting portion 33 of each of the anti-separation pieces 3 prevents the connecting portion 32 of each of the anti-separation pieces 3 from falling out of the corresponding mounting hole 41 due to a self-weight of each of the anti-separation pieces 3. Conversely, after moving each abutting portion 31 upward via each limiting portion 33, the inner frame 12 is pulled out from the outer frame 11, and each of the transverse side walls 18 of the inner frame 12 abuts against a corresponding abutting portion 31 to deform the corresponding abutting portion 31, thereby allowing the inner frame 12 to be withdrawn from the outer frame 11. In summary, such configurations facilitate mounting of the anti-separation pieces 3 and also facilitate withdrawal of the inner frame 12 from the outer frame 11.

[0026] In one embodiment, connecting pieces 9 are fixedly disposed on one of the transverse side walls 18 of the outer frame 11 away from the inner frame 12 and on one of the transverse side walls 18 of the inner frame 12 away from the outer frame 11. The connecting pieces 9 are cylindrical. In one embodiment, each of the connecting pieces 9 is a hollow cylinder. It should be noted that each of the connecting pieces 9 is disposed at a position where a corresponding transverse side wall 18 intersects with a corresponding longitudinal side wall 17. That is, each of the connecting pieces 9 is also disposed on a corresponding transverse side wall 18. Any two adjustable racks are connected by connecting the connecting pieces 9 of the two adjustable racks via connecting columns. For instance, two ends of each of the connecting columns are respectively plugged into corresponding two connecting pieces 9 of the two adjustable racks. In this way, a plurality of adjustable racks are spaced apart from each other in the vertical direction to form a multi-layer structure, thereby improving space utilization.

[0027] In one embodiment, the present disclosure provides another adjustable rack. The adjustable rack of the second embodiment differs from that of the first embodiment in the connecting pieces 9 and the anti-separation pieces 3. In the adjustable rack of the second embodiment, there are four connecting pieces 9, which are respectively disposed at four corners of the frame assembly 1 (i.e., two corners of the outer frame 11 and two corners of the inner frame 12).

[0028] In another embodiment, each of the mounting components 4 (the mounting components 4 are defined as first mounting portions) is triangular and defines a mounting hole 41. Each of the anti-separation pieces 3 further comprises a rotating operating portion 34 fixedly connected to the abutting portion 31 thereof. Each abutting portion 31 passes through a corresponding mounting hole 41 and is screwed with the corresponding mounting hole 41. It is easily understood that each abutting portion 31 is cylindrical and has threads, and each mounting hole 41 is a threaded hole. Each of the longitudinal side walls 17 comprises a longitudinal top beam 161, a longitudinal bottom beam 162, and a longitudinal reinforcing beam 169 disposed between the longitudinal top beam 161 and the longitudinal bottom beam 162. For each of the longitudinal side walls 17, the longitudinal reinforcing beam 169 thereof is triangular wave-shaped and fixedly connected to the longitudinal top beam 161 thereof and the longitudinal bottom beam 162 thereof by welding. Each of the mounting components 4 is fixedly embedded in a space enclosed by a corresponding longitudinal reinforcing beam 169 and a corresponding longitudinal top beam 161, or each of the mounting components 4 is fixedly embedded in a triangular space enclosed by the corresponding longitudinal reinforcing beam 169 and the corresponding longitudinal bottom beam 162. For example, each of the mounting components 4 is fixed by welding to a corresponding longitudinal reinforcing beam 169 or a corresponding longitudinal top beam 161. In the second embodiment, an overall height of the adjustable rack is small, making it suitable for use in scenarios where height is limited.

[0029] In one embodiment, each of the guide rails 2 defines a through hole 22; and each rotating operating portion 34 is completely located within a projection of a corresponding through hole 22 in the vertical plane. In the embodiment, each rotating operating portion is easily rotated, and a weight of the two guide rails 2 is reduced.

[0030] In one embodiment, each of the mounting components 4 (the mounting components 4 are defined as second mounting portions) is plate-shaped and fixed to a top end of a corresponding guide rail 2. Each abutting portion 31 is an elastic plate member and gradually lowers in height as it approaches one of the two transverse side walls 18 of the inner frame 12 located inside the outer frame 11. For example, each of the mounting components 4, the corresponding guide rail 2, and the corresponding abutting portion 31 are integrally formed by stamping and bending a steel plate. During a process of inserting the inner frame 12 into the outer frame 11, each abutting portion 31 undergoes elastic deformation to allow a corresponding transverse side wall 18 of the inner frame 12 to pass each abutting portion 31, so that the corresponding transverse side wall 18 is allowed to be located inside the outer frame 11. However, when the inner frame 12 is pulled out from the outer frame 11, each abutting portion 31 still achieves an anti-separation function. In the third embodiment, it is easy to insert the inner frame 12 into the outer frame 11.

[0031] It should be noted that a technical solution of the second embodiment and a technical solution of the third embodiment may be combined to form a fourth embodiment. As shown in FIG. 7, in a technical solution of the fourth embodiment, the mounting components comprise both the first mounting portions and the second mounting portions, and the anti-separation pieces 3 comprise first anti-separation pieces 3 (which may refer to the anti-separation pieces 3 shown in FIG. 6) matched with the first mounting portions and second anti-separation pieces 3 respectively matched with the second mounting portions, so that a connection between the inner frame 12 and the outer frame 11 is more stable. That is, a position of the inner frame 12 relative to the outer frame 11 is fixed, avoiding sliding of the inner frame 12 that might occur when only second mounting portions are provided while also avoiding a phenomenon where the inner frame and the outer frame might become loose after first mounting portions loosen.

[0032] In the present disclosure, terms such as "first," "second," and the like are used not to indicate any order, quantity, or importance, but rather are used solely for the purpose of distinction.

[0033] In the present disclosure, terms such as "a," "an," and the like do not indicate a limitation of quantity, but rather indicate the presence of at least one of the mentioned objects.

[0034] In the present disclosure, terms indicating orientation or position, such as "top," "bottom," "side," "longitudinal," "transverse," "middle," "center," "outer," "inner," "horizontal," "vertical," "left," "right," "above," "below," and the like, are intended to reflect relative positions rather than absolute positions.

[0035] In the present disclosure, terms such as "substantially," "overall," "approximately," "nearly," and the like are qualifying terms used to indicate the existence of a feature while allowing for a certain degree of deviation. The amount of deviation allowed may vary depending on the specific context. For example, for deviations in size, it may depend on the specific context, including, but not limited to, relevant standards for dimensional tolerances.

Examples

second embodiment

[0028]In another embodiment, each of the mounting components 4 (the mounting components 4 are defined as first mounting portions) is triangular and defines a mounting hole 41. Each of the anti-separation pieces 3 further comprises a rotating operating portion 34 fixedly connected to the abutting portion 31 thereof. Each abutting portion 31 passes through a corresponding mounting hole 41 and is screwed with the corresponding mounting hole 41. It is easily understood that each abutting portion 31 is cylindrical and has threads, and each mounting hole 41 is a threaded hole. Each of the longitudinal side walls 17 comprises a longitudinal top beam 161, a longitudinal bottom beam 162, and a longitudinal reinforcing beam 169 disposed between the longitudinal top beam 161 and the longitudinal bottom beam 162. For each of the longitudinal side walls 17, the longitudinal reinforcing beam 169 thereof is triangular wave-shaped and fixedly connected to the longitudinal top beam 161 thereof and t...

third embodiment

[0030]In one embodiment, each of the mounting components 4 (the mounting components 4 are defined as second mounting portions) is plate-shaped and fixed to a top end of a corresponding guide rail 2. Each abutting portion 31 is an elastic plate member and gradually lowers in height as it approaches one of the two transverse side walls 18 of the inner frame 12 located inside the outer frame 11. For example, each of the mounting components 4, the corresponding guide rail 2, and the corresponding abutting portion 31 are integrally formed by stamping and bending a steel plate. During a process of inserting the inner frame 12 into the outer frame 11, each abutting portion 31 undergoes elastic deformation to allow a corresponding transverse side wall 18 of the inner frame 12 to pass each abutting portion 31, so that the corresponding transverse side wall 18 is allowed to be located inside the outer frame 11. However, when the inner frame 12 is pulled out from the outer frame 11, each abutt...

Claims

1. An adjustable rack of a wardrobe, comprising: a frame assembly; two guide rails; anti-separation pieces; and mounting components; wherein the frame assembly comprises an outer frame and an inner frame, and both of the outer frame and the inner frame comprise a supporting wall, two longitudinal side walls, and two transverse side walls; wherein the two guide rails define rail grooves, and the two guide rails are respectively fixed to inner sides of the two longitudinal side walls of the outer frame so that the two longitudinal side walls of the inner frame are respectively and slidably inserted into the rail grooves; or the two guide rails are fixed to outer sides of the two longitudinal side walls of the inner frame, so that the two longitudinal side walls of the outer frame are respectively and slidably inserted into the rail grooves; wherein each of the anti-separation pieces comprises an abutting portion; wherein each of the mounting components is fixedly connected to a corresponding anti-separation piece and a corresponding guide rail, so that an anti-separation gap is defined between a bottom end of each abutting portion and a top end of a corresponding transverse side wall of the inner frame.

2. The adjustable rack according to claim 1, wherein each of the mounting components is fixedly connected to a top end of a corresponding guide rail and defines a mounting hole, each of the anti-separation pieces further comprises a connecting portion fixedly connected to the abutting portion thereof, and each connecting portion is embedded in a corresponding mounting hole.

3. The adjustable rack according to claim 2, wherein each of the anti-separation pieces further comprises a limiting portion fixedly connected to the connecting portion thereof, and each abutting portion is elastic; wherein for each of the anti-separation pieces, a cross-sectional area of the abutting portion thereof gradually decreases in a direction away from the connecting portion thereof, a projection of the connecting portion thereof in a horizontal plane is completely within a projection of the abutting portion thereof in the horizontal plane, and the projection of the connecting portion thereof in the horizontal plane is completely within a projection of the limiting portion thereof in the horizontal plane; wherein a thickness of each connecting portion is greater than a thickness of each of the mounting components.

4. The adjustable rack according to claim 1, wherein connecting pieces are fixedly arranged on the inner frame and the outer frame, where a first connecting piece is fixedly disposed on one of the two transverse side walls of the outer frame away from the inner frame, and a second connecting piece is fixedly disposed on one of the two transverse side walls of the inner frame away from the outer frame.

5. The adjustable rack according to claim 1, wherein each of the mounting components is triangular and defines a mounting hole, each of the anti-separation pieces further comprises a rotating operating portion fixedly connected to the abutting portion thereof, and each abutting portion passes through a corresponding mounting hole and is screwed with the corresponding mounting hole; wherein each of the longitudinal side walls comprises a longitudinal top beam, a longitudinal bottom beam, and a longitudinal reinforcing beam fixedly connected between the longitudinal top beam and the longitudinal bottom beam; wherein each longitudinal reinforcing beam is triangular wave-shaped; wherein each of the mounting components is fixedly embedded in a space enclosed by a corresponding longitudinal reinforcing beam and a corresponding longitudinal top beam, or each of the mounting components is fixedly embedded in a triangular space enclosed by the corresponding longitudinal reinforcing beam and the corresponding longitudinal bottom beam.

6. The adjustable rack according to claim 5, wherein each of the guide rails defines a through hole; and each rotating operating portion is completely located within a projection of a corresponding through hole in a vertical plane.

7. The adjustable rack according to claim 1, wherein each of the mounting components is plate-shaped and fixed to a top end of a corresponding guide rail, and each abutting portion is an elastic sheet-like member and gradually lowers in height as each abutting portion approaches one of the two transverse side walls of the inner frame located inside the outer frame.

8. The adjustable rack according to claim 1, wherein the mounting components comprise first mounting portions and second mounting portions, and the anti-separation pieces comprise first anti-separation pieces respectively matched with the first mounting portions and second anti-separation pieces respectively matched with the second mounting portions; wherein each of the first mounting portions is triangular and defines a mounting hole, each of the first anti-separation pieces further comprises a rotating operating portion fixedly connected to the abutting portion thereof, and the abutting portion thereof passes through a corresponding mounting hole and is screwed with the corresponding mounting hole; wherein each of the longitudinal side walls comprises a longitudinal top beam, a longitudinal bottom beam, and a longitudinal reinforcing beam fixedly connected between the longitudinal top beam and the longitudinal bottom beam; wherein each reinforcing beam is triangular wave-shaped; wherein each of the first mounting portions is fixedly embedded in a space enclosed by a corresponding longitudinal reinforcing beam and a corresponding longitudinal top beam, or each of the first mounting portions is fixedly embedded in a triangular space enclosed by the corresponding longitudinal reinforcing beam and the corresponding longitudinal bottom beam; wherein each of the second mounting portions is plate-shaped and fixed to a top end of a corresponding guide rail; and the abutting portion thereof is an elastic sheet-like member and gradually lowers in height as the abutting portion thereof approaches one of the two transverse side walls of the inner frame located inside the outer frame.

9. The adjustable rack according to claim 1, wherein each of the longitudinal side walls comprises a longitudinal top beam, a longitudinal reinforcing beam, and a longitudinal bottom beam parallel to the longitudinal top beam; wherein each longitudinal reinforcing beam is triangular wave-shaped; wherein each of the longitudinal side walls is formed by welding the longitudinal reinforcing beam thereof between the longitudinal top beam thereof and the longitudinal bottom beam thereof.

10. The adjustable rack according to claim 1, wherein each supporting wall is formed by laying supporting beams of a grille shape in a rectangular frame enclosed by corresponding two longitudinal bottom beams and corresponding two transverse bottom beams; wherein each of the transverse side walls comprises a transverse top beam, a transverse reinforcing beam, and a transverse bottom beam parallel to the transverse top beam; wherein each transverse reinforcing beam is triangular wave-shaped; wherein each of the transverse side walls is formed by welding the transverse reinforcing beam thereof between the transverse top beam thereof and the transverse bottom beam thereof.