Prefabricated shelf

The modular shelf assembly system addresses the challenges of cumbersome assembly and instability in metal angle-based shelves by utilizing a boltless assembly method with integrated joining pieces and auxiliary coupling holes, enabling quick, tool-free assembly and enhanced stability.

WO2025127337A1PCT designated stage expired Publication Date: 2025-06-19POHANG IRON & STEEL CO LTD
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Patent Information

Application Number
PCT/KR2024/014438
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-12-15
Filing Date
2024-09-25
Publication Date
2025-06-19

AI Technical Summary

Technical Problem

Existing metal angle-based shelves are cumbersome to assemble and disassemble, require separate fastening tools, and can become unstable due to loose bonds or incorrect flatness, leading to potential collapse.

Method used

A modular shelf assembly system that allows for boltless assembly using vertically and horizontally bent angles with integrated joining pieces and auxiliary coupling holes, enabling easy attachment of auxiliary shelves and cover plates without separate fastening members.

Benefits of technology

Facilitates quick and easy assembly and disassembly of the shelf without tools, enhances stability by ensuring secure angle connections, and allows for adjustable and removable auxiliary components as needed.

✦ Generated by Eureka AI based on patent content.

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    Figure KR2024014438_19062025_PF_FP_ABST
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Abstract

This prefabricated shelf comprises: a plurality of vertical angles to be disposed at corner portions of a rectangular shape, and including a first plate, a second plate formed vertically bent from the first plate, and a bending portion formed between the first plate and the second plate; a plurality of horizontal angles to be disposed between the plurality of vertical angles, respectively, and having coupling holes formed at both ends so as to be vertically coupled to the vertical angles; a shelf that is placed on the upper portion of the horizontal angles; and an auxiliary shelf that is coupled to the vertical angles. The vertical angles comprise: a plurality of coupling pieces formed on the first plate and the second plate along the longitudinal direction of the vertical angles and coupled to the coupling holes; and a plurality of auxiliary coupling holes formed on the bending portion along the longitudinal direction of the vertical angles and coupled to the auxiliary shelf.
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Description

modular shelves

[0001] The present disclosure relates to an assembly-type shelf that can be assembled without a separate fastening member.

[0002] Recently, there has been an increasing trend of using metal angles, which are relatively inexpensive and have excellent strength, rather than expensive materials such as raw wood, for general display cases or storage cabinets. Prefabricated shelves using these angles can easily display or load various types of items by arranging shelves in multiple tiers between vertical and horizontal angles.

[0003] Most of these prefabricated metal angles are assembled using a universal method of fastening fasteners such as bolts or nuts between holes drilled at regular intervals in each frame. This makes them excellent in durability, but it can be cumbersome as assembly and disassembly can take a long time and require the use of separate tools.

[0004] Additionally, if the angle bond is loose or the shelf is not flat, the structure itself may become unstable due to an abnormality in the center of gravity, and there is a constant risk of collapse.

[0005] Additionally, depending on the environmental characteristics of the installation location and the needs of the user, the assembled shelf may require a separate auxiliary shelf or one side of the assembled shelf may need to be covered with a screen, etc.

[0006] Recently, technologies related to boltless fastening structures have been developed to enable quick and easy assembly without the need for separate fastening elements by allowing vertical and horizontal angles to be drilled or bent to be fastened to each other.

[0007] One aspect of the present disclosure provides an assembly-type shelf that can be assembled without separate fastening members.

[0008] In addition, a modular shelf is provided in which, in addition to the shelf mounted on the top of the horizontal angle, a separate auxiliary shelf can be attached from the outside of the modular shelf without a separate fastening member.

[0009] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0010] According to one embodiment of the disclosed invention, an assembly shelf comprises a first plate provided in plurality to be arranged at a corner portion of a square shape, a second plate formed by being vertically bent from the first plate, a vertical angle including a bent portion formed between the first plate and the second plate, a horizontal angle provided in plurality to be arranged between each of the plurality of vertical angles and having joining holes formed at both ends to be vertically coupled to the vertical angle, a shelf mounted on the upper portion of the horizontal angle, and an auxiliary shelf coupled to the vertical angle. The vertical angle comprises a joining piece formed in a plurality of the first plate and the second plate along the longitudinal direction of the vertical angle and the joining hole coupled to, and an auxiliary joining hole formed in a plurality of the bent portions along the longitudinal direction of the vertical angle and to which the auxiliary shelf is coupled.

[0011] The auxiliary shelf may include a first coupling hook coupled to the auxiliary coupling hole.

[0012] The height of the above auxiliary shelf can be adjusted depending on the position of the auxiliary coupling hole to which the first coupling hook is coupled.

[0013] A cover plate covering one side of the above assembly shelf may be further included.

[0014] The above cover plate may include a second coupling hook coupled to the auxiliary coupling hole.

[0015] The above-mentioned joining piece may be formed to protrude from the first plate and the second plate toward the inside of the assembled shelf.

[0016] The above-mentioned coupling hole may include a first coupling hole having a first length in the longitudinal direction of the horizontal angle, and a second coupling hole extending from the first coupling hole in a direction perpendicular to the longitudinal direction of the horizontal angle and having a second length shorter than the first length in the longitudinal direction of the horizontal angle.

[0017] The above-mentioned connecting piece may include a first connecting piece having a length shorter than the first length and longer than the second length in the longitudinal direction of the horizontal angle, and a second connecting piece connecting the first connecting piece and the first plate and the second plate, and having a length shorter than the second length in the longitudinal direction of the horizontal angle.

[0018] When combining the horizontal angle with the vertical angle, the horizontal angle may be pressed against the vertical angle so that the first coupling piece of the vertical angle is inserted into the first coupling hole of the horizontal angle, and then the horizontal angle may be moved in the longitudinal direction of the vertical angle so that the first coupling piece is positioned in the second coupling hole.

[0019] According to one embodiment of the disclosed invention, a modular shelf comprises a plurality of vertical angles provided to be arranged at corner portions of a square shape and including a vertically bent portion, a plurality of horizontal angles provided to be arranged between each of the plurality of vertical angles and vertically coupled to the vertical angles, a shelf mounted on the upper portion of the horizontal angles, and an auxiliary shelf coupled to the vertical angles. An auxiliary coupling hole into which the auxiliary shelf is coupled is formed in the bend portion, and a plurality of auxiliary coupling holes are formed along the longitudinal direction of the vertical angle.

[0020] The auxiliary shelf includes a first coupling hook coupled to the auxiliary coupling hole, and the first coupling hook can be coupled to the auxiliary coupling hole from the outside of the assembly shelf.

[0021] A cover plate covering one side of the above assembly shelf may be further included.

[0022] The cover plate includes a second coupling hook coupled to the auxiliary coupling hole, and the second coupling hook can be coupled to the auxiliary coupling hole from the outside of the assembly shelf.

[0023] According to embodiments of the disclosed invention, a modular shelf can be easily assembled without a separate fastening member.

[0024] In addition, in addition to the shelf mounted on the top of the horizontal angle, a separate auxiliary shelf, etc. can be easily attached to the assembled shelf from the outside of the assembled shelf without a separate fastening member.

[0025] The effects that can be obtained from this document are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains from the description below.

[0026] FIG. 1 is a perspective view illustrating an assembly shelf according to one embodiment.

[0027] Figure 2 is a drawing showing the assembled shelf illustrated in Figure 1 from another direction.

[0028] FIG. 3 is a drawing showing a horizontal angle coupled to a vertical angle according to one embodiment, and a shelf mounted on top of the horizontal angle.

[0029] FIG. 4 is a drawing showing a vertical angle, a horizontal angle, and a shelf in an exploded state according to one embodiment.

[0030] FIG. 5 is a drawing illustrating a horizontal angle being combined with a vertical angle according to one embodiment.

[0031] FIG. 6 is a drawing showing a first coupling piece of a vertical angle inserted into a first coupling hole of a horizontal angle according to one embodiment.

[0032] Figure 7 is a drawing showing the first coupling piece positioned in the second coupling hole by moving the horizontal angle in the downward direction in Figure 6.

[0033] FIG. 8 is a drawing illustrating a horizontal angle combined with a vertical angle according to one embodiment.

[0034] FIG. 9 is a drawing showing an auxiliary shelf according to one embodiment being coupled to a vertical angle.

[0035] FIG. 10 is a drawing showing an auxiliary shelf according to one embodiment coupled to a vertical angle.

[0036] FIG. 11 is a drawing showing a cover plate according to one embodiment being coupled to a vertical angle.

[0037] FIG. 12 is a drawing showing a cover plate according to one embodiment coupled to a vertical angle.

[0038] The embodiments described in this specification are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents or modified examples that can replace them at the time of filing this application are also included in the scope of the rights of the present invention.

[0039] Additionally, the same reference numbers or symbols presented in each drawing of the present disclosure represent parts or components that perform substantially the same function.

[0040] In addition, the terminology used in this disclosure is used to describe embodiments and is not intended to limit and / or restrict the disclosure. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this disclosure, terms such as “comprise” or “have” are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the disclosure, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0041] Additionally, terms including ordinal numbers such as “first,” “second,” etc. used in the present disclosure may be used to describe various components, but the components are not limited by the terms, and the terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present disclosure, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term “and / or” includes any combination of a plurality of related listed items or any item among a plurality of related listed items.

[0042] Furthermore, the meaning of "identical" in this disclosure includes having similar properties or being similar within a certain range. Furthermore, "identical" means "substantially identical." "Substantially identical" should be understood to include values ​​that fall within the manufacturing error range or values ​​that differ from a reference value within a range that has no significance.

[0043] Additionally, terms such as "~part", "~device", "~block", "~absence", and "~module" may refer to a unit that processes at least one function or operation. For example, the terms may refer to at least one hardware such as an FPGA (field-programmable gate array) / ASIC (application specific integrated circuit), at least one software stored in a memory, or at least one process processed by a processor.

[0044] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0045] Meanwhile, the terms “front,” “rear,” “left,” and “right” used in the description below are defined based on the drawing, and the shape and position of each component are not limited by these terms.

[0046] Hereinafter, preferred embodiments according to the present disclosure will be described in detail with reference to the attached drawings.

[0047] FIG. 1 is a perspective view illustrating an assembly shelf according to one embodiment. FIG. 2 is a view illustrating the assembly shelf illustrated in FIG. 1 from another direction. FIG. 3 is a view illustrating a horizontal angle coupled to a vertical angle according to one embodiment, and a shelf positioned on top of the horizontal angle. FIG. 4 is a view illustrating an exploded view of the vertical angle, the horizontal angle, and the shelf according to one embodiment.

[0048] As illustrated in FIGS. 1 to 4, the modular shelf may include vertical angles (10) arranged at corner portions of a square shape. A plurality of vertical angles (10) may be provided. Although the drawings illustrate that the modular shelf is arranged to have a square shape and four vertical angles (10) are arranged, this is not a limitation. That is, when the modular shelf has a shape other than a square shape, the number of vertical angles (10) may be arranged accordingly.

[0049] The vertical angle (10) may include a first plate (11) in a plate shape. The vertical angle (10) may include a second plate (12) in a plate shape that is formed by being vertically bent from the first plate (11). The vertical angle (10) may include a bent portion (13) formed between the first plate (11) and the second plate (12). That is, the vertical angle (10) may be formed by being bent in an “ㄱ” shape.

[0050] The vertical angle (10) may include a plurality of connecting pieces (14) formed on the first plate (11) and the second plate (12) along the longitudinal direction of the vertical angle (10). The connecting holes (21) of the horizontal angle (20) may be connected to the connecting pieces (14). A detailed description thereof will be provided below.

[0051] The vertical angle (10) may include a plurality of auxiliary coupling holes (17) formed in the bend portion (13) along the longitudinal direction of the vertical angle (10). An auxiliary shelf (40) may be coupled to the auxiliary coupling holes (17).

[0052] The modular shelf may include a plurality of horizontal angles (20) arranged between each of the plurality of vertical angles (10). Although the drawing illustrates that the modular shelf is arranged to have a square shape, with four vertical angles (10) and four horizontal angles (20) arranged to correspond to the number of vertical angles (10), the present invention is not limited thereto. That is, when the modular shelf has a shape other than a square shape, the number of horizontal angles (20) may be arranged to correspond to the number of vertical angles (10). In the above, the number of horizontal angles (20) may be the number arranged in one layer on which one shelf (30) is installed. That is, the horizontal angles (20) may be arranged in multiple layers, with a plurality of horizontal angles per layer.

[0053] The horizontal angle (20) may be formed by bending in an “ㄱ” shape so that a shelf (30) can be installed on the upper portion. The horizontal angle (20) may include a coupling hole (21) that is coupled to the vertical angle (10). That is, the shelf (30) may be installed on the upper surface of the “ㄱ” shape of the horizontal angle (20), and the coupling hole (21) may be formed on the other surface that is bent from the upper surface. The coupling hole (21) may be formed at both ends of the horizontal angle (20). The coupling hole (21) may be coupled to the coupling piece (14) of the vertical angle (10). The horizontal angle (20) may be coupled to the vertical angle (10) in a vertical direction. That is, when the joining hole (21) of the horizontal angle (20) is joined to the joining piece (14) of the vertical angle (10), the vertical angle (10) and the horizontal angle (20) can be arranged perpendicular to each other.

[0054] The modular shelf may include a shelf (30) that is mounted on top of a horizontal angle (20). Items, etc., may be stored on top of the shelf (30).

[0055] The assembled shelf may include an auxiliary shelf (40) that is coupled to a vertical angle (10). The auxiliary shelf (40) may be coupled to an auxiliary coupling hole (17) formed in a bend (13) of the vertical angle (10) on the outside of the assembled shelf. A detailed description thereof will be provided below.

[0056] The modular shelf may include a cover plate (50) that covers one side of the modular shelf. The cover plate (50) may be attached to the modular shelf when it is necessary to cover one side of the modular shelf. The cover plate (50) may be attached to an auxiliary connecting hole (17) formed in a bend (13) of a vertical angle (10) on the outside of the modular shelf. A detailed description thereof will be provided below.

[0057] FIG. 5 is a drawing illustrating a horizontal angle being coupled to a vertical angle according to one embodiment. FIG. 6 is a drawing illustrating a first coupling piece of a vertical angle being inserted into a first coupling hole of a horizontal angle according to one embodiment. FIG. 7 is a drawing illustrating a state in which the horizontal angle in FIG. 6 is moved downward so that the first coupling piece is positioned in the second coupling hole. FIG. 8 is a drawing illustrating a state in which a horizontal angle is coupled to a vertical angle according to one embodiment.

[0058] As illustrated in FIG. 5, the vertical angle (10) may include a plurality of connecting pieces (14) formed on the first plate (11) and the second plate (12) along the longitudinal direction of the vertical angle (10). The connecting pieces (14) may be formed to protrude from the first plate (11) and the second plate (12) toward the inside of the assembly shelf. Since the connecting pieces (14) are formed to protrude from the first plate (11) and the second plate (12) toward the inside of the assembly shelf, the horizontal angle (20) may be connected to contact the inner surface among the inner and outer surfaces of the vertical angle (10).

[0059] The coupling member (14) may include a first coupling member (15) formed to be spaced apart from the first plate (11) and the second plate (12). The first coupling member (15) may be inserted into the first coupling hole (23) of the horizontal angle (20) when the horizontal angle (20) is coupled to the vertical angle (10).

[0060] The connecting piece (14) may include a first connecting piece (15) and a second connecting piece (16) connecting the first plate (11) and the second plate (12). That is, the first connecting piece (15) spaced apart from the first plate (11) and the second plate (12) may be connected to the first plate (11) and the second plate (12) by the second connecting piece (16). The second connecting piece (16) may connect the upper and lower portions of the first connecting piece (15) to the first plate (11) and the second plate (12), respectively. The second connecting piece (16) may be formed to have a shorter length than the first connecting piece (15) in the longitudinal direction of the horizontal angle (20).

[0061] The horizontal angle (20) may include a coupling hole (21) formed at both ends of the horizontal angle (20). The coupling hole (21) may include a first coupling hole (23) having a first length in the longitudinal direction of the horizontal angle (20). When the horizontal angle (20) is coupled to the vertical angle (10), a first coupling piece (15) may be inserted into the first coupling hole (23). That is, the first coupling hole (23) may be formed to have a longer length than the first coupling piece (15) in the longitudinal direction of the horizontal angle (20).

[0062] The coupling hole (21) may include a second coupling hole (25) extending from the first coupling hole (23) in a direction perpendicular to the longitudinal direction of the horizontal angle (20). The second coupling hole (25) may be formed to extend from the first coupling hole (23) at the upper and lower portions of the first coupling hole (23). The second coupling hole (25) may be formed to have a second length in the longitudinal direction of the horizontal angle (20). The second length of the second coupling hole (25) may be shorter than the first length of the first coupling hole (23). That is, the first coupling piece (15) may be formed to have a length shorter than the first length of the first coupling hole (23) and longer than the second length of the second coupling hole (25) in the longitudinal direction of the horizontal angle (20). The second joint (16) can be formed to have a length shorter than the second length of the second joint (25) in the longitudinal direction of the horizontal angle (20).

[0063] As shown in Fig. 6, when connecting a horizontal angle (20) to a vertical angle (10), the horizontal angle (20) can be pressed against the vertical angle (10) so that the first connecting piece (14) of the vertical angle (10) is inserted into the first connecting hole (23) of the horizontal angle (20).

[0064] After the horizontal angle (20) is pressed against the vertical angle (10) and the first coupling piece (14) is inserted into the first coupling hole (23), as shown in FIGS. 7 and 8, the horizontal angle (20) can be moved in the longitudinal direction of the vertical angle (10) so that the first coupling piece (15) is positioned in the second coupling hole (25). That is, the horizontal angle (20) can be moved downward in the drawing so that the first coupling piece (15) is positioned in the second coupling hole (25). Since the length of the first coupling piece (15) of the vertical angle (10) is longer than the length of the second coupling hole (25) based on the longitudinal direction of the horizontal angle (20), when the first coupling piece (15) is positioned in the second coupling hole (25), the horizontal angle (20) can be coupled to the vertical angle (10).

[0065] FIG. 9 is a drawing illustrating an auxiliary shelf according to one embodiment being coupled to a vertical angle. FIG. 10 is a drawing illustrating an auxiliary shelf according to one embodiment being coupled to a vertical angle.

[0066] As illustrated in FIGS. 9 and 10, the modular shelf may include an auxiliary shelf (40). When the interior of a square shape formed by the vertical angle (10) and the horizontal angle (20) is set as the interior of the modular shelf and the exterior of the square shape is set as the exterior of the modular shelf, the auxiliary shelf (40) may be coupled to the auxiliary coupling hole (17) of the vertical angle (10) from the exterior of the modular shelf. The auxiliary shelf (40) may include a first coupling hook (41) coupled to the auxiliary coupling hole (17) of the vertical angle (10). The height of the auxiliary shelf (40) may be freely adjusted depending on the position of the auxiliary coupling hole (17) to which the first coupling hook (41) is coupled. In addition, the position of the auxiliary shelf (40) may be freely adjusted depending on the position of the auxiliary coupling hole (17) to which the first coupling hook (41) is coupled. That is, the position of the auxiliary shelf (40) can be freely moved without disassembling the combined vertical angle (10) and horizontal angle (20). (See Fig. 1)

[0067] FIG. 11 is a drawing illustrating a cover plate according to one embodiment being coupled to a vertical angle. FIG. 12 is a drawing illustrating a cover plate according to one embodiment being coupled to a vertical angle.

[0068] As illustrated in FIGS. 11 and 12, the modular shelf may include a cover plate (50). The cover plate (50) may cover one side of the modular shelf as needed. The cover plate (50) may be coupled to the auxiliary coupling hole (17) of the vertical angle (10) from the outside of the modular shelf, similar to the auxiliary shelf (40) illustrated in FIGS. 9 and 10. The cover plate (50) may include a second coupling hook (51) coupled to the auxiliary coupling hole (17) of the vertical angle (10). The cover plate (50) may cover one side of the modular shelf depending on the surrounding environment where the modular shelf is located or the needs of the user.

[0069] While the technical concept of the present invention has been described above through specific examples, the scope of the present invention is not limited to these examples. Various embodiments that can be modified or altered by those skilled in the art without departing from the spirit of the present invention as defined in the claims are also within the scope of the present invention.

Claims

1. A vertical angle provided in multiple pieces to be arranged at corner portions of a square shape, comprising a first plate, a second plate formed by being vertically bent from the first plate, and a bent portion formed between the first plate and the second plate; A horizontal angle provided in multiple pieces so as to be placed between each of the plurality of vertical angles, and having joining holes formed at both ends so as to be joined in a vertical direction to the vertical angles; A shelf mounted on the upper portion of the horizontal angle; and Including an auxiliary shelf coupled to the above vertical angle; The above vertical angle is, A plurality of joining pieces are formed on the first plate and the second plate along the longitudinal direction of the vertical angle, and the joining holes are joined; and Auxiliary joining holes formed in multiple numbers in the bend section along the longitudinal direction of the vertical angle and to which the auxiliary shelf is joined; A modular shelf including:

2. In paragraph 1, The above auxiliary shelf is an assembly-type shelf including a first coupling hook coupled to the above auxiliary coupling hole.

3. In paragraph 2, The above auxiliary shelf is an assembly-type shelf whose height is adjusted according to the position of the auxiliary coupling hole to which the first coupling hook is coupled.

4. In paragraph 1, An assembly shelf further comprising a cover plate covering one side of the assembly shelf.

5. In paragraph 4, An assembly shelf, wherein the cover plate includes a second coupling hook coupled to the auxiliary coupling hole.

6. In paragraph 1, An assembly shelf in which the above-mentioned joining piece is formed by protruding from the first plate and the second plate so as to face the interior of the assembly shelf.

7. In paragraph 1, An assembly-type shelf, wherein the above-mentioned joining holes include a first joining hole having a first length in the longitudinal direction of the horizontal angle, and a second joining hole extending from the first joining hole in a direction perpendicular to the longitudinal direction of the horizontal angle and having a second length shorter than the first length in the longitudinal direction of the horizontal angle.

8. In paragraph 7, An assembly-type shelf, wherein the connecting piece comprises a first connecting piece having a length shorter than the first length and longer than the second length in the longitudinal direction of the horizontal angle, and a second connecting piece connecting the first connecting piece and the first plate and the second plate, the second connecting piece having a length shorter than the second length in the longitudinal direction of the horizontal angle.

9. In paragraph 8, An assembly-type shelf in which, when connecting the horizontal angle to the vertical angle, the horizontal angle is pressed against the vertical angle so that the first connecting piece of the vertical angle is inserted into the first connecting hole of the horizontal angle, and then the horizontal angle is moved in the longitudinal direction of the vertical angle so that the first connecting piece is positioned in the second connecting hole.

10. A vertical angle provided in multiple pieces to be arranged at corners of a square shape, the vertical angle including a plurality of connecting pieces formed along the length direction of the vertical angle; A horizontal angle provided in a plurality of pieces to be arranged between each of the plurality of vertical angles and including a joining hole formed at both ends to be joined to the joining piece; and A shelf mounted on top of the above horizontal angle; Including, The above-mentioned joining hole is, a first coupling hole having a first length in the longitudinal direction of the horizontal angle; and A second coupling hole extending from the first coupling hole in a direction perpendicular to the longitudinal direction of the horizontal angle and having a second length shorter than the first length in the longitudinal direction of the horizontal angle; The above combination piece is, A first joining piece having a length shorter than the first length and longer than the second length in the longitudinal direction of the horizontal angle; and A second coupling piece extending from the first coupling piece in a direction perpendicular to the longitudinal direction of the horizontal angle and having a length shorter than the second length in the longitudinal direction of the horizontal angle; A modular shelf including:

11. In Article 10, An assembly-type shelf in which, when connecting the horizontal angle to the vertical angle, the horizontal angle is pressed against the vertical angle so that the first connecting piece of the vertical angle is inserted into the first connecting hole of the horizontal angle, and then the horizontal angle is moved in the longitudinal direction of the vertical angle so that the first connecting piece is positioned in the second connecting hole.

12. In paragraph 11, An assembly-type shelf in which the horizontal angle is prevented from being separated from the vertical angle when the first connecting piece having a length longer than the second length is positioned in the second connecting hole having the second length.

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