Rack frame structure, shelf structure, and assembly rack

Abstract

This provides a new mechanism that allows for the addition of extra shelves. [Solution] The rack frame structure comprises a first mounting part attached to a first support column via a first coupling, a second mounting part attached to a second support column via a second coupling, a third mounting part attached to a third support column via a third coupling, a fourth mounting part attached to a fourth support column via a fourth coupling, an inner support part that supports a first shelf board, and an outer support part that supports a connecting shelf board. A receiving space for receiving a part of the connecting shelf board is formed between the inner support part and the outer support part.

Description

Technical Field

[0001] The present invention relates to a frame structure for a rack, a shelf structure, and an assembled rack.

Background Art

[0002] Assembled racks are known.

[0003] As a related technique, Patent Document 1 discloses an additional rack. In the additional rack described in Patent Document 1, a hook hooked on an existing rack supports an additional shelf board.

[0004] Patent Document 2 discloses a shelf board support. The shelf board support described in Patent Document 2 includes a support cylinder portion fixed to a column and a support flange portion attached to the support cylinder portion.

[0005] Patent Document 3 discloses a shelf fixture. The shelf fixture described in Patent Document 3 includes a fixture main body attached to a column via an O-ring. The fixture main body includes an engagement hole that can engage with an engagement portion of a shelf board.

[0006] Patent Documents 1, 2, and 3 disclose structures that allow for the addition of shelf boards. However, such structures require special parts (for example, the hooks described in Patent Document 1) or special configurations provided in members attached to columns.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

[0008] The objective of this invention is to provide a novel mechanism that allows for the addition of shelves. [Means for solving the problem]

[0009] Embodiments of the present invention relate to rack frame structures, shelf structures, and assembly racks as shown in the following paragraphs. In the following paragraphs, the means for solving the problem will be described using the numbers and reference numerals used in the embodiments for carrying out the invention. These numbers and reference numerals are added in parentheses for reference to show an example of the correspondence between the claims and the embodiments for carrying out the invention. Therefore, the claims should not be interpreted restrictively because of the parenthetical descriptions.

[0010] (i) A first mounting portion (21) attached to the first support column (51) via a first coupling (61), A second mounting portion (22) is attached to the second support column (52) via a second coupling (62), A third mounting portion (23) is attached to the third support column (53) via a third coupling (63), A fourth mounting portion (24) is attached to the fourth support column (54) via a fourth coupling (64), The inner support part (30) that supports the first shelf board (71), The outer support part (40) that supports the connecting shelf board (81) and It is equipped with, A receiving space (SP1) is formed between the inner support portion (30) and the outer support portion (40) to receive a part of the connecting shelf board (81). Rack frame structure. (ii) The inner support portion (30) has a first inner connecting body (31a) that connects the first mounting portion (21) and the second mounting portion (22), The outer support portion (40) has a first outer connecting body (41a) that connects the first mounting portion (21) and the second mounting portion (22). The rack frame structure described in (i) above. (iii) The first outer connector (41a) is The upper bar (411a) and, The lower bar (412a) and, A corrugated bar (413a) connecting the upper bar (411a) and the lower bar (412a) has The rack frame structure described in (ii) above. (iv) The inner support portion (30) has an inner frame (31) which is roughly rectangular in plan view, The outer support portion (40) has an outer frame (41) that is substantially rectangular in plan view. A rack frame structure as described in any one of the above (i) to (iii). (5) The first mounting portion (21), the second mounting portion (22), the third mounting portion (23), the fourth mounting portion (24), the inner support portion (30), and the outer support portion (40) are integrated by welding. A rack frame structure as described in any one of the above (i) through (iv). (vi) A rack frame structure (2) described in any one of (i) to (v) above, The aforementioned first shelf board (71) and, The aforementioned connecting shelf (81) and including Shelf structure. (7) The receiving space (SP1) between the inner support portion (30) and the outer support portion (40) includes a gap (GP) into which both a portion of the connecting shelf (81) and a portion of the first shelf (71) can be inserted. The shelf structure described in (6) above. (viii) The first shelf (71) can be attached to the rack frame structure (2) by the action of inserting a part of the first shelf (71) into the gap (GP), The connecting shelf (81) can be attached to the rack frame structure (2) simply by inserting a portion of the connecting shelf (81) into the gap (GP). The shelf structure described in (7) above. (9) The rack frame structure (2) described in (4) above, the first shelf board (71) and the connecting shelf board (81) and including the first shelf board (71) is a first shelf board portion (711) supported by the inner frame body (31), a first protruding piece (713a) inserted into a first gap (GP1) between a first side of the inner frame body (31) and a first side of the outer frame body (41), a second protruding piece (713b) inserted into a second gap (GP2) between a second side of the inner frame body (31) and a second side of the outer frame body (41), a third protruding piece (713c) inserted into a third gap (GP3) between a third side of the inner frame body (31) and a third side of the outer frame body (41), a fourth protruding piece (713d) inserted into a fourth gap (GP4) between a fourth side of the inner frame body (31) and a fourth side of the outer frame body (41), having a shelf structure. (X) The rack frame structure (2) according to any one of (I) to (V) above, a first group of columns (5) including the first column (5I), the second column (52), the third column (53), and the fourth column (54), a first group of couplings (6) including the first coupling (6I), the second coupling (62), the third coupling (63), and the fourth coupling (64), and the first shelf board (71) supported by the inner support portion (30) of the rack frame structure (2). comprising a prefabricated rack. (XI) The rack frame structure (2) according to any one of (I) to (V) above, A first rack (100A) comprising: a first group of support columns (5) including the first support column (51), the second support column (52), the third support column (53), and the fourth support column (54); a first group of couplings (6) including the first coupling (61), the second coupling (62), the third coupling (63), and the fourth coupling (64); and the first shelf (71) supported by the inner support portion (30) of the rack frame structure (2); A support structure (10B) comprising a second group of support columns (15), a second group of couplings (16), and structural members (SD) attached to the second group of support columns (15) via the second group of couplings (16), The connecting shelf (81) connects the rack frame structure (2) and the structural member (SD) Equipped with Assembly-type rack. (12) A rack frame structure (2) described in any one of (1) to (5) above, A first rack (100A) comprising: a first group of support columns (5) including the first support column (51), the second support column (52), the third support column (53), and the fourth support column (54); a first group of couplings (6) including the first coupling (61), the second coupling (62), the third coupling (63), and the fourth coupling (64); and the first shelf (71) supported by the inner support portion (30) of the rack frame structure (2); A second rack (100B) comprising: a second group of support columns (15); a second group of couplings (16); a second frame structure (12) attached to the second group of support columns (15) via the second group of couplings (16); and a second shelf (72) supported by the second frame structure (12), The connecting shelf (81) connects the rack frame structure (2) and the second frame structure (12). It is equipped with, A second receiving space (SP2) is formed between the inner support portion (130) and the outer support portion (140) of the second frame structure (12) to receive the other part of the connecting shelf board (81). Assembly-type rack. [Effects of the Invention]

[0011] This invention provides a new mechanism that allows for the addition of extra shelves. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a schematic perspective view illustrating the rack frame structure in the first embodiment. [Figure 2] Figure 2 is a schematic perspective view showing the rack frame structure before the first shelf is attached. [Figure 3] Figure 3 is a schematic perspective view showing the rack frame structure after the first shelf has been attached. [Figure 4] Figure 4 is a schematic perspective view illustrating an example of a modular rack. [Figure 5] Figure 5 is a schematic perspective view illustrating another example of a modular rack. [Figure 6] Figure 6 is a schematic longitudinal cross-sectional view illustrating how the first shelf and connecting shelf are attached to the rack frame structure. [Figure 7] Figure 7 is a schematic perspective view showing a portion of the rack frame structure. [Figure 8] Figure 8 is a schematic perspective view illustrating a portion of the shelf structure. [Figure 9] Figure 9 is a schematic plan view illustrating the rack frame structure in the first embodiment. [Figure 10] Figure 10 is a schematic perspective view illustrating the rack frame structure in the first embodiment. [Figure 11] Figure 11 is a schematic perspective view illustrating yet another example of a modular rack. [Figure 12] Figure 12 is a schematic plan view illustrating the rack frame structure in the first embodiment. [Figure 13]Figure 13 is a schematic plan view illustrating the combination of the rack frame structure and the first shelf. [Figure 14] Figure 14 is a schematic perspective view illustrating an example of a shelf structure in the second embodiment. [Figure 15] Figure 15 is a schematic perspective view illustrating the combination of the rack frame structure and the first shelf. [Figure 16] Figure 16 is a schematic bottom view illustrating the first shelf. [Figure 17] Figure 17 is a schematic longitudinal cross-sectional view illustrating a portion of the shelf structure. [Figure 18] Figure 18 shows the connecting shelf board viewed from a diagonal downward angle. [Figure 19] Figure 19 is a schematic perspective view illustrating an example of the components of an assembly rack in the third embodiment. [Figure 20] Figure 20 is a schematic perspective view illustrating the combination of the first group of supports and the first group of couplings. [Figure 21] Figure 21 is a schematic perspective view illustrating an example of an assembly made up of the components shown in Figure 19, as well as several additional components. [Figure 22] Figure 22 is a schematic perspective view illustrating an example of a shelf structure. [Figure 23] Figure 23 is a schematic perspective view illustrating an example of a modular rack in the third embodiment. [Figure 24] Figure 24 is a schematic perspective view illustrating another example of the modular rack in the third embodiment. [Figure 25] Figure 25 is a schematic perspective view illustrating how the modular rack shown in Figure 23 is assembled. [Figure 26] Figure 26 is a view from diagonally below showing the assembly process of the modular rack shown in Figure 24. [Figure 27] Figure 27 is a schematic perspective view illustrating an example of a second frame structure. [Figure 28]Figure 28 is a schematic perspective view illustrating yet another example of a modular rack in the third embodiment. [Figure 29] Figure 29 is a schematic perspective view illustrating yet another example of a modular rack in the third embodiment. [Modes for carrying out the invention]

[0013] The rack frame structure 2 and the assembled rack 1 in the embodiment will be described below with reference to the drawings. In the following description, the same reference numerals are used for members and parts that have the same function, and repeated descriptions of members and parts with the same reference numerals will be omitted.

[0014] (First embodiment) The rack frame structure 2 in the first embodiment will be described with reference to Figures 1 to 18. Figure 1 is a schematic perspective view showing the rack frame structure 2 in the first embodiment. Figure 2 is a schematic perspective view showing the state before the first shelf 71 is attached to the rack frame structure 2. Figure 3 is a schematic perspective view showing the state after the first shelf 71 has been attached to the rack frame structure 2. Figure 4 is a schematic perspective view showing an example of an assembly rack 1. Figure 5 is a schematic perspective view showing another example of an assembly rack 1. Figure 6 is a schematic longitudinal cross-sectional view showing how the first shelf 71 and the connecting shelf 81 are attached to the rack frame structure 2. Figure 7 is a schematic perspective view showing a part of the rack frame structure 2. Figure 8 is a schematic perspective view showing a part of the shelf structure ST. Note that in Figure 8, the part of the rack frame structure 2 that is hidden behind the first shelf 71 and not normally visible is shown by a dashed line. Figure 9 is a schematic plan view illustrating the rack frame structure 2 in the first embodiment. Figure 10 is a schematic perspective view illustrating the rack frame structure 2 in the first embodiment. Figure 11 is a schematic perspective view illustrating yet another example of the modular rack 1. Figure 12 is a schematic plan view illustrating the rack frame structure 2 in the first embodiment. Figure 13 is a schematic plan view illustrating the combination of the rack frame structure 2 and the first shelf 71. Figure 14 is a schematic perspective view illustrating an example of the shelf structure ST. Figure 15 is a schematic perspective view illustrating the combination of the rack frame structure 2 and the first shelf 71. Figure 16 is a schematic bottom view illustrating the first shelf 71. Figure 17 is a schematic longitudinal cross-sectional view illustrating a part of the shelf structure ST. Figure 18 is a view of the connecting shelf 81 from diagonally below.

[0015] As illustrated in Figure 1, the rack frame structure 2 includes a first mounting portion 21, a second mounting portion 22, a third mounting portion 23, a fourth mounting portion 24, an inner support portion 30, and an outer support portion 40.

[0016] As illustrated in Figure 2, the first mounting portion 21 is attached to the first support column 51 via the first coupling 61. The second mounting portion 22 is attached to the second support column 52 via the second coupling 62. The third mounting portion 23 is attached to the third support column 53 via the third coupling 63. The fourth mounting portion 24 is attached to the fourth support column 54 via the fourth coupling 64.

[0017] The inner support portion 30 (see Figure 2) supports the first shelf board 71 (see Figure 3). The outer support portion 40 (see Figure 3) supports the connecting shelf board 81 (see Figure 4 or Figure 5). As illustrated in Figure 4 or Figure 5, the connecting shelf board 81 connects the rack frame structure 2 and the support structure 10B (for example, the non-rack type support structure 10B shown in Figure 4, or the rack type support structure 10B shown in Figure 5), and functions as a shelf board.

[0018] As illustrated in Figure 1, a receiving space SP1 is formed between the inner support portion 30 and the outer support portion 40 to receive a part of the connecting shelf plate 81 (for example, the projection 813 shown in Figure 6).

[0019] In the examples shown in Figures 6(a) and 6(b), by moving the connecting shelf 81 downward, a portion of the connecting shelf 81 (for example, the projection 813 shown in Figure 6(a)) can be inserted into the receiving space SP1.

[0020] In the example shown in Figure 6, the lower end of the receiving space SP1 is open. In this case, dust is less likely to accumulate in the receiving space SP1. Alternatively, the lower end of the receiving space SP1 may be closed (for example, the receiving space SP1 may be formed by a U-shaped support including an inner support 30, an outer support 40, and a bottom connecting the inner support 30 and the outer support 40).

[0021] The rack frame structure 2 in the first embodiment has an inner support portion 30 that supports the first shelf board 71 and an outer support portion 40 that supports the connecting shelf board 81. A receiving space SP1 is formed between the inner support portion 30 and the outer support portion 40 into which a part of the connecting shelf board 81 (for example, a protruding piece 813) is inserted. Therefore, by inserting a part of the connecting shelf board 81 (for example, a protruding piece 813) into the receiving space SP1, additional shelves can be easily added.

[0022] (Optional additional configuration) Next, with reference to Figures 1 to 18, we will describe optional additional configurations that can be adopted in the rack frame structure 2 in the first embodiment.

[0023] (First inner connecting body 31a) In the example shown in Figure 7, the inner support portion 30 has a first inner connector 31a that connects the first mounting portion 21 and the second mounting portion 22. When the first inner connector 31a is connected to the first mounting portion 21 and the second mounting portion 22, the structural strength of the structure including the first inner connector 31a is increased. Furthermore, as illustrated in Figure 8, the first inner connector 31a can distribute and transmit the load received from the first shelf 71 to the first support column 51 and the second support column 52.

[0024] As illustrated in Figure 9, the joint between the first inner connector 31a and the second inner connector 31b (hereinafter referred to as "first joint M1") may be connected to the first mounting portion 21. The first joint M1 may be welded to the first mounting portion 21. As illustrated in Figure 9, the joint between the first inner connector 31a and the third inner connector 31c (hereinafter referred to as "second joint M2") may be connected to the second mounting portion 22. The second joint M2 may be welded to the second mounting portion 22. As illustrated in Figure 9, the first joint M1 may connect the first inner connector 31a and the second inner connector 31b in a substantially T-shape in plan view. As illustrated in Figure 9, the second joint M2 may connect the first inner connector 31a and the third inner connector 31c in a substantially T-shape in plan view.

[0025] In this specification, a plan view means viewing the rack from above to below when the rack is assembled. When the rack is not yet assembled, a plan view means viewing along a direction parallel to the central axis of the first mounting portion 21 and from the top of the first mounting portion 21 to the bottom of the first mounting portion 21. In this specification, a side view and a front view each mean viewing in a direction perpendicular to the plan view. When the rack frame structure 2 has a roughly rectangular shape, a side view typically means viewing along the long side of the rack frame structure 2. When the rack frame structure 2 has a roughly rectangular shape, a front view typically means viewing along the short side of the rack frame structure 2. The terms plan view, side view, and front view may be interpreted in accordance with common sense.

[0026] In the example shown in Figure 7, the first inner connector 31a includes an upper bar (hereinafter referred to as the "first upper bar 311a"), a lower bar (hereinafter referred to as the "first lower bar 312a"), and a corrugated bar (hereinafter referred to as the "first corrugated bar 313a") connecting the first upper bar 311a and the first lower bar 312a. More specifically, multiple wave crests of the first corrugated bar 313a are connected to (more specifically, welded to) the first upper bar 311a, and multiple wave crests of the first corrugated bar 313a are connected to (more specifically, welded to) the first lower bar 312a.

[0027] When the first inner connector 31a has a first upper bar 311a, a first lower bar 312a, and a first corrugated bar 313a, the structural strength of the first inner connector 31a is increased.

[0028] In the example shown in Figure 9, the first upper bar 311a is connected to the first mounting portion 21 via the third upper bar 311b, which will be described later. Alternatively, the first upper bar 311a may be directly connected to the first mounting portion 21. In the example shown in Figure 9, the first upper bar 311a is connected to the second mounting portion 22 via the fifth upper bar 311c, which will be described later. Alternatively, the first upper bar 311a may be directly connected to the second mounting portion 22.

[0029] The first inner connector 31a is made of metal, for example. The first inner connector 31a has a linear shape in plan view, for example.

[0030] (First outer connecting body 41a) In the example shown in Figure 7, the outer support portion 40 has a first outer connecting body 41a that connects the first mounting portion 21 and the second mounting portion 22. When the first outer connecting body 41a is connected to the first mounting portion 21 and the second mounting portion 22, the structural strength of the structure including the first outer connecting body 41a is increased. Furthermore, when the first outer connecting body 41a connected to the first mounting portion 21 and the second mounting portion 22 supports the connecting shelf 81, as illustrated in Figure 8, the first outer connecting body 41a can distribute and transmit the load received from the connecting shelf 81 to the first support column 51 and the second support column 52.

[0031] In the example shown in Figure 7, the first outer connector 41a includes an upper bar (hereinafter referred to as the "second upper bar 411a"), a lower bar (hereinafter referred to as the "second lower bar 412a"), and a corrugated bar (hereinafter referred to as the "second corrugated bar 413a") connecting the second upper bar 411a and the second lower bar 412a. More specifically, multiple wave crests of the second corrugated bar 413a are connected to (more specifically, welded to) the second upper bar 411a, and multiple wave crests of the second corrugated bar 413a are connected to (more specifically, welded to) the second lower bar 412a.

[0032] When the first outer connector 41a has a second upper bar 411a, a second lower bar 412a, and a second corrugated bar 413a, the structural strength of the first outer connector 41a is increased. In the example shown in Figure 7, the second upper bar 411a, a part 216a of the first mounting portion 21, the second lower bar 412a, and a part 226a of the second mounting portion 22 form an elongated, roughly rectangular structure in side view. Therefore, the structural strength of the first outer connector 41a is increased.

[0033] If the first outer connector 41a is composed of multiple bars (more specifically, the second upper bar 411a, the second lower bar 412a, and the second corrugated bar 413a), it is easy to attach additional options (for example, additional storage boxes CT (see Figure 11), hooks, etc.) to the first outer connector 41a.

[0034] The first outer connector 41a is made of metal, for example. The first outer connector 41a has a linear shape in plan view, for example.

[0035] One end of the first outer connector 41a may be welded to the first mounting portion 21. More specifically, as illustrated in Figure 7, one end e1 of the second upper bar 411a and one end e2 of the second lower bar 412a may each be welded to the first mounting portion 21. The other end of the first outer connector 41a may be welded to the second mounting portion 22. More specifically, the other end f1 of the second upper bar 411a and the other end f2 of the second lower bar 412a may each be welded to the second mounting portion 22.

[0036] As illustrated in Figure 7, the first inner connector 31a and the first outer connector 41a may be substantially parallel. In the example shown in Figure 7, the first upper bar 311a and the second upper bar 411a are substantially parallel. Also, the first lower bar 312a and the second lower bar 412a are substantially parallel.

[0037] The height of the upper end of the first inner connector 31a (more specifically, the height of the upper end of the first upper bar 311a) may be substantially the same as the height of the upper end of the first outer connector 41a (more specifically, the height of the upper end of the second upper bar 411a). In this case, it is easy to make the height of the first shelf 71 supported by the first inner connector 31a the same as the height of the connecting shelf 81 supported by the first outer connector 41a (see Figure 6(b)).

[0038] The height of the lower end of the first inner connector 31a (more specifically, the height of the lower end of the first lower bar 312a) may be substantially the same as the height of the lower end of the first outer connector 41a (more specifically, the height of the lower end of the second lower bar 412a).

[0039] In the example shown in Figure 9, the first upper bar 311a, the first connecting part M1, part 217a of the first mounting part 21, the second upper bar 411a, part 227a of the second mounting part 22, and the second connecting part M2 form an elongated closed structure in plan view (more specifically, an elongated roughly rectangular structure in plan view). In this case, the bending strength of the rack frame structure 2 in the horizontal plane is increased.

[0040] In the example shown in Figure 9, a first gap GP1 is formed between the first inner connector 31a (more specifically, the first upper bar 311a) and the first outer connector 41a (more specifically, the second upper bar 411a). The first gap GP1 may be an elongated gap extending along the extending direction of the first outer connector 41a. The first gap GP1 may be an elongated gap having a length substantially corresponding to the distance between the first mounting portion 21 and the second mounting portion 22. The width W1 of the first gap GP1 is, for example, 1 mm or more, 3 mm or more, 5 mm or more, 7 mm or more, 9 mm or more, or 11 mm or more. The width W1 of the first gap GP1 is, for example, 25 mm or less.

[0041] (Second inner connecting body 31b) In the example shown in Figure 10, the inner support portion 30 has a second inner connector 31b that connects the first mounting portion 21 and the third mounting portion 23. When the second inner connector 31b is connected to the first mounting portion 21 and the third mounting portion 23, the structural strength of the structure including the second inner connector 31b is increased. In addition, the second inner connector 31b can distribute and transmit the load received from the first shelf 71 to the first support column 51 and the third support column 53.

[0042] In the example shown in Figure 10, the second inner connector 31b includes an upper bar (hereinafter referred to as the "third upper bar 311b"), a lower bar (hereinafter referred to as the "third lower bar 312b"), and a corrugated bar (hereinafter referred to as the "third corrugated bar 313b") connecting the third upper bar 311b and the third lower bar 312b. More specifically, multiple wave crests of the third corrugated bar 313b are connected to (more specifically, welded to) the third upper bar 311b, and multiple wave crests of the third corrugated bar 313b are connected to (more specifically, welded to) the third lower bar 312b.

[0043] When the second inner connector 31b has a third upper bar 311b, a third lower bar 312b, and a third corrugated bar 313b, the structural strength of the second inner connector 31b increases. In the example shown in Figure 10, the third upper bar 311b, a part 215b of the first mounting portion 21, the third lower bar 312b, and a part 235b of the third mounting portion 23 form an elongated, roughly rectangular structure in front view. Therefore, the structural strength of the second inner connector 31b increases.

[0044] The second inner connector 31b is made of metal, for example. One end of the second inner connector 31b may be welded to the first mounting portion 21. More specifically, one end e3 of the third upper bar 311b and one end e4 of the third lower bar 312b may be welded to the first mounting portion 21. The other end of the second inner connector 31b may be welded to the third mounting portion 23. More specifically, the other end f3 of the third upper bar 311b and the other end f4 of the third lower bar 312b may be welded to the third mounting portion 23.

[0045] (Second outer connecting body 41b) In the example shown in Figure 10, the outer support portion 40 has a second outer connector 41b that connects the first mounting portion 21 and the third mounting portion 23. When the second outer connector 41b is connected to the first mounting portion 21 and the third mounting portion 23, the structural strength of the structure including the second outer connector 41b is increased. Also, as illustrated in Figure 11, when the second outer connector 41b connected to the first mounting portion 21 and the third mounting portion 23 supports the connecting shelf 81, the second outer connector 41b can distribute and transmit the load received from the connecting shelf 81 to the first support column 51 and the third support column 53.

[0046] In the example shown in Figure 10, the second outer connector 41b includes an upper bar (hereinafter referred to as the "fourth upper bar 411b"), a lower bar (hereinafter referred to as the "fourth lower bar 412b"), and a corrugated bar (hereinafter referred to as the "fourth corrugated bar 413b") connecting the fourth upper bar 411b and the fourth lower bar 412b. More specifically, multiple wave crests of the fourth corrugated bar 413b are connected to (more specifically, welded to) the fourth upper bar 411b, and multiple wave crests of the fourth corrugated bar 413b are connected to (more specifically, welded to) the fourth lower bar 412b.

[0047] When the second outer connector 41b has a fourth upper bar 411b, a fourth lower bar 412b, and a fourth corrugated bar 413b, the structural strength of the second outer connector 41b increases. In the example shown in Figure 10, the fourth upper bar 411b, a part 216b of the first mounting portion 21, the fourth lower bar 412b, and a part 236b of the third mounting portion 23 form an elongated, roughly rectangular structure in front view. Therefore, the structural strength of the second outer connector 41b increases.

[0048] If the second outer connector 41b is composed of multiple bars (more specifically, the fourth upper bar 411b, the fourth lower bar 412b, and the fourth corrugated bar 413b), it is easier to attach additional options (e.g., additional storage boxes, hooks, etc.) to the second outer connector 41b.

[0049] The second outer connector 41b is made of metal, for example. One end of the second outer connector 41b may be welded to the first mounting portion 21. More specifically, one end e5 of the fourth upper bar 411b and one end (not visible in Figure 10) of the fourth lower bar 412b may be welded to the first mounting portion 21. The other end of the second outer connector 41b may be welded to the third mounting portion 23. More specifically, the other end f5 of the fourth upper bar 411b and the other end f6 of the fourth lower bar 412b may be welded to the third mounting portion 23.

[0050] As illustrated in Figure 10, the second inner connector 31b and the second outer connector 41b may be substantially parallel. In the example shown in Figure 10, the third upper bar 311b and the fourth upper bar 411b are substantially parallel. Also, the third lower bar 312b and the fourth lower bar 412b are substantially parallel.

[0051] The height of the upper end of the second inner connector 31b may be substantially the same as the height of the upper end of the second outer connector 41b. In this case, it is easy to make the height of the first shelf 71 supported by the second inner connector 31b the same as the height of the connecting shelf 81 supported by the second outer connector 41b (see Figure 11). The height of the lower end of the second inner connector 31b may be substantially the same as the height of the lower end of the second outer connector 41b.

[0052] In the example shown in Figure 9, the second inner connector 31b (more specifically, the third upper bar 311b), a part 217b of the first mounting portion 21, the second outer connector 41b (more specifically, the fourth upper bar 411b), and a part 237b of the third mounting portion 23 form an elongated closed structure in plan view (more specifically, an elongated roughly rectangular structure in plan view). In this case, the bending strength of the rack frame structure 2 in the horizontal plane is increased.

[0053] In the example shown in Figure 9, a second gap GP2 is formed between the second inner connector 31b (more specifically, the third upper bar 311b) and the second outer connector 41b (more specifically, the fourth upper bar 411b). The second gap GP2 may be an elongated gap extending along the extending direction of the second outer connector 41b. The second gap GP2 may be an elongated gap having a length substantially corresponding to the distance between the first mounting portion 21 and the third mounting portion 23. In the example shown in Figure 9, the second gap GP2 extends from the first mounting portion 21 to the third mounting portion 23. The width W2 of the second gap GP2 is, for example, 1 mm or more, 3 mm or more, 5 mm or more, 7 mm or more, 9 mm or more, or 11 mm or more. The width W2 of the second gap GP2 is, for example, 25 mm or less.

[0054] (Third inner connecting body 31c) In the example shown in Figure 10, the inner support portion 30 has a third inner connector 31c that connects the second mounting portion 22 and the fourth mounting portion 24. When the third inner connector 31c is connected to the second mounting portion 22 and the fourth mounting portion 24, the structural strength of the structure including the third inner connector 31c is increased. In addition, the third inner connector 31c can distribute and transmit the load received from the first shelf 71 to the second support column 52 and the fourth support column 54.

[0055] In the example shown in Figure 10, the third inner connector 31c has an upper bar (hereinafter referred to as the "fifth upper bar 311c"), a lower bar (hereinafter referred to as the "fifth lower bar 312c"), and a corrugated bar (hereinafter referred to as the "fifth corrugated bar 313c") connecting the fifth upper bar 311c and the fifth lower bar 312c. More specifically, multiple wave crests of the fifth corrugated bar 313c are connected to (more specifically, welded to) the fifth upper bar 311c, and multiple wave crests of the fifth corrugated bar 313c are connected to (more specifically, welded to) the fifth lower bar 312c.

[0056] When the third inner connector 31c has a fifth upper bar 311c, a fifth lower bar 312c, and a fifth corrugated bar 313c, the structural strength of the third inner connector 31c increases. In the example shown in Figure 10, the fifth upper bar 311c, a part 224c of the second mounting portion 22, the fifth lower bar 312c, and a part 244c of the fourth mounting portion 24 form an elongated, roughly rectangular structure in front view. Therefore, the structural strength of the third inner connector 31c increases.

[0057] The third inner connector 31c is made of metal, for example. One end of the third inner connector 31c may be welded to the second mounting portion 22. More specifically, one end e7 of the fifth upper bar 311c and one end e8 of the fifth lower bar 312c may be welded to the second mounting portion 22. The other end of the third inner connector 31c may be welded to the fourth mounting portion 24. More specifically, the other end f7 of the fifth upper bar 311c and the other end f8 of the fifth lower bar 312c may be welded to the fourth mounting portion 24.

[0058] (Third outer connecting body 41c) In the example shown in Figure 10, the outer support portion 40 has a third outer connector 41c that connects the second mounting portion 22 and the fourth mounting portion 24. When the third outer connector 41c is connected to the second mounting portion 22 and the fourth mounting portion 24, the structural strength of the structure including the third outer connector 41c is increased. Furthermore, when the third outer connector 41c connected to the second mounting portion 22 and the fourth mounting portion 24 supports the connecting shelf 81, the third outer connector 41c can distribute and transmit the load received from the connecting shelf 81 to the second support column 52 and the fourth support column 54.

[0059] In the example shown in Figure 10, the third outer connector 41c has an upper bar (hereinafter referred to as the "sixth upper bar 411c"), a lower bar (hereinafter referred to as the "sixth lower bar 412c"), and a corrugated bar (hereinafter referred to as the "sixth corrugated bar 413c") connecting the sixth upper bar 411c and the sixth lower bar 412c. More specifically, multiple wave crests of the sixth corrugated bar 413c are connected to (more specifically, welded to) the sixth upper bar 411c, and multiple wave crests of the sixth corrugated bar 413c are connected to (more specifically, welded to) the sixth lower bar 412c.

[0060] When the third outer connector 41c has a sixth upper bar 411c, a sixth lower bar 412c, and a sixth corrugated bar 413c, the structural strength of the third outer connector 41c is increased. In the example shown in Figure 10, the sixth upper bar 411c, a part 226c of the second mounting portion 22, the sixth lower bar 412c, and a part 246c of the fourth mounting portion 24 form an elongated, roughly rectangular structure in front view. Therefore, the structural strength of the third outer connector 41c is increased.

[0061] If the third outer connector 41c is composed of multiple bars (more specifically, the sixth upper bar 411c, the sixth lower bar 412c, and the sixth corrugated bar 413c), it is easy to attach additional options (e.g., additional storage boxes, hooks FK (see Figure 11), etc.) to the third outer connector 41c.

[0062] The third outer connector 41c is, for example, made of metal. One end of the third outer connector 41c may be welded to the second mounting portion 22. More specifically, as illustrated in Figure 10, one end e9 of the sixth upper bar 411c and one end e10 of the sixth lower bar 412c may be welded to the second mounting portion 22. The other end of the third outer connector 41c may be welded to the fourth mounting portion 24. More specifically, the other end f9 of the sixth upper bar 411c and the other end f10 of the sixth lower bar 412c may be welded to the fourth mounting portion 24.

[0063] As illustrated in Figure 10, the third inner connector 31c and the third outer connector 41c may be substantially parallel. In the example shown in Figure 10, the fifth upper bar 311c and the sixth upper bar 411c are substantially parallel. Also, the fifth lower bar 312c and the sixth lower bar 412c are substantially parallel.

[0064] The height of the upper end of the third inner connector 31c may be substantially the same as the height of the upper end of the third outer connector 41c. In this case, it is easier to make the height of the first shelf 71 supported by the third inner connector 31c the same as the height of the connecting shelf 81 supported by the third outer connector 41c. The height of the lower end of the third inner connector 31c may be substantially the same as the height of the lower end of the third outer connector 41c.

[0065] In the example shown in Figure 9, the third inner connector 31c (more specifically, the fifth upper bar 311c), a part 227c of the second mounting portion 22, the third outer connector 41c (more specifically, the sixth upper bar 411c), and a part 247c of the fourth mounting portion 24 form an elongated closed structure in plan view (more specifically, an elongated roughly rectangular structure in plan view). In this case, the bending strength of the rack frame structure 2 in the horizontal plane is increased.

[0066] In the example shown in Figure 9, a third gap GP3 is formed between the third inner connector 31c (more specifically, the fifth upper bar 311c) and the third outer connector 41c (more specifically, the sixth upper bar 411c). The third gap GP3 may be an elongated gap extending along the extending direction of the third outer connector 41c. The third gap GP3 may be an elongated gap having a length substantially corresponding to the distance between the second mounting portion 22 and the fourth mounting portion 24. In the example shown in Figure 9, the third gap GP3 extends from the second mounting portion 22 to the fourth mounting portion 24. The width W3 of the third gap GP3 is, for example, 1 mm or more, 3 mm or more, 5 mm or more, 7 mm or more, 9 mm or more, or 11 mm or more. The width W3 of the third gap GP3 is, for example, 25 mm or less.

[0067] (4th inner connector 31d) In the example shown in Figure 10, the inner support portion 30 has a fourth inner connector 31d that connects the third mounting portion 23 and the fourth mounting portion 24. When the fourth inner connector 31d is connected to the third mounting portion 23 and the fourth mounting portion 24, the structural strength of the structure including the fourth inner connector 31d is increased. In addition, the fourth inner connector 31d can distribute and transmit the load received from the first shelf board 71 to the third support column 53 and the fourth support column 54.

[0068] As illustrated in Figure 9, the joint between the fourth inner connector 31d and the second inner connector 31b (hereinafter referred to as "third joint M3") may be connected to the third mounting portion 23. The third joint M3 may be welded to the third mounting portion 23. As illustrated in Figure 9, the joint between the fourth inner connector 31d and the third inner connector 31c (hereinafter referred to as "fourth joint M4") may be connected to the fourth mounting portion 24. The fourth joint M4 may be welded to the fourth mounting portion 24. As illustrated in Figure 9, the third joint M3 may connect the fourth inner connector 31d and the second inner connector 31b in a substantially T-shape in plan view. As illustrated in Figure 9, the fourth joint M4 may connect the fourth inner connector 31d and the third inner connector 31c in a substantially T-shape in plan view.

[0069] In the example shown in Figure 10, the fourth inner connector 31d includes an upper bar (hereinafter referred to as the "seventh upper bar 311d"), a lower bar (hereinafter referred to as the "seventh lower bar 312d"), and a corrugated bar (hereinafter referred to as the "seventh corrugated bar 313d") connecting the seventh upper bar 311d and the seventh lower bar 312d. More specifically, multiple wave crests of the seventh corrugated bar 313d are connected to (more specifically, welded to) the seventh upper bar 311d, and multiple wave crests of the seventh corrugated bar 313d are connected to (more specifically, welded to) the seventh lower bar 312d.

[0070] When the fourth inner connector 31d has a seventh upper bar 311d, a seventh lower bar 312d, and a seventh corrugated bar 313d, the structural strength of the fourth inner connector 31d increases.

[0071] In the example shown in Figure 9, the seventh upper bar 311d is connected to the third mounting portion 23 via the third upper bar 311b. Alternatively, the seventh upper bar 311d may be directly connected to the third mounting portion 23. In the example shown in Figure 9, the seventh upper bar 311d is connected to the fourth mounting portion 24 via the fifth upper bar 311c. Alternatively, the seventh upper bar 311d may be directly connected to the fourth mounting portion 24.

[0072] The fourth inner connector 31d is made of metal, for example.

[0073] (Fourth outer connecting body 41d) In the example shown in Figure 10, the outer support portion 40 has a fourth outer connector 41d that connects the third mounting portion 23 and the fourth mounting portion 24. When the fourth outer connector 41d is connected to the third mounting portion 23 and the fourth mounting portion 24, the structural strength of the structure including the fourth outer connector 41d is increased. Furthermore, when the fourth outer connector 41d connected to the third mounting portion 23 and the fourth mounting portion 24 supports the connecting shelf 81, the fourth outer connector 41d can distribute and transmit the load received from the connecting shelf 81 to the third support column 53 and the fourth support column 54.

[0074] In the example shown in Figure 10, the fourth outer connector 41d includes an upper bar (hereinafter referred to as the "eighth upper bar 411d"), a lower bar (hereinafter referred to as the "eighth lower bar 412d"), and a corrugated bar (hereinafter referred to as the "eighth corrugated bar 413d") connecting the eighth upper bar 411d and the eighth lower bar 412d. More specifically, multiple wave crests of the eighth corrugated bar 413d are connected to (more specifically, welded to) the eighth upper bar 411d, and multiple wave crests of the eighth corrugated bar 413d are connected to (more specifically, welded to) the eighth lower bar 412d.

[0075] When the fourth outer connector 41d has an eighth upper bar 411d, an eighth lower bar 412d, and an eighth corrugated bar 413d, the structural strength of the fourth outer connector 41d increases. In the example shown in Figure 10, the eighth upper bar 411d, a part of the third mounting portion 23, the eighth lower bar 412d, and a part of the fourth mounting portion 24 form an elongated, roughly rectangular structure in side view. Therefore, the structural strength of the fourth outer connector 41d increases.

[0076] If the fourth outer connector 41d is composed of multiple bars (more specifically, the eighth upper bar 411d, the eighth lower bar 412d, and the eighth corrugated bar 413d), it is easier to attach additional options (e.g., additional storage boxes, hooks, etc.) to the fourth outer connector 41d.

[0077] The fourth outer connector 41d is, for example, made of metal. One end of the fourth outer connector 41d may be welded to the third mounting portion 23. More specifically, one end of the eighth upper bar 411d and one end of the eighth lower bar 412d may each be welded to the third mounting portion 23. The other end of the fourth outer connector 41d may be welded to the fourth mounting portion 24. More specifically, the other end of the eighth upper bar 411d and the other end of the eighth lower bar 412d may each be welded to the fourth mounting portion 24.

[0078] As illustrated in Figure 10, the fourth inner connector 31d and the fourth outer connector 41d may be substantially parallel. In the example shown in Figure 10, the seventh upper bar 311d and the eighth upper bar 411d are substantially parallel. Also, the seventh lower bar 312d and the eighth lower bar 412d are substantially parallel.

[0079] The height of the upper end of the fourth inner connector 31d may be substantially the same as the height of the upper end of the fourth outer connector 41d. In this case, it is easier to make the height of the first shelf 71 supported by the fourth inner connector 31d the same as the height of the connecting shelf 81 supported by the fourth outer connector 41d. The height of the lower end of the fourth inner connector 31d may be substantially the same as the height of the lower end of the fourth outer connector 41d.

[0080] In the example shown in Figure 9, the seventh upper bar 311d, the third joint M3, a part of the third mounting part 23, the eighth upper bar 411d, a part of the fourth mounting part 24, and the fourth joint M4 form an elongated closed structure in plan view (more specifically, an elongated roughly rectangular structure in plan view). In this case, the bending strength of the rack frame structure 2 in the horizontal plane is increased.

[0081] In the example shown in Figure 9, a fourth gap GP4 is formed between the fourth inner connector 31d (more specifically, the seventh upper bar 311d) and the fourth outer connector 41d (more specifically, the eighth upper bar 411d). The fourth gap GP4 may be an elongated gap extending along the extending direction of the fourth outer connector 41d. The fourth gap GP4 may be an elongated gap having a length substantially corresponding to the distance between the third mounting portion 23 and the fourth mounting portion 24. The width W4 of the fourth gap GP4 is, for example, 1 mm or more, 3 mm or more, 5 mm or more, 7 mm or more, 9 mm or more, or 11 mm or more. The width W4 of the fourth gap GP4 is, for example, 25 mm or less.

[0082] (Inner support part 30) In the example shown in Figure 12, the inner support portion 30 has an inner frame 31 that is substantially rectangular in plan view. The inner frame 31 includes a first inner connector 31a, a second inner connector 31b, a third inner connector 31c, and a fourth inner connector 31d. More specifically, the first inner connector 31a is positioned on the first side of the inner frame 31, the second inner connector 31b is positioned on the second side of the inner frame 31, the third inner connector 31c is positioned on the third side of the inner frame 31, and the fourth inner connector 31d is positioned on the fourth side of the inner frame 31.

[0083] When the inner support portion 30 has an inner frame 31 that is substantially rectangular in plan view, the inner support portion 30 can suitably support all four sides of the first shelf board 71.

[0084] In the example shown in Figure 12, the first mounting portion 21, the second mounting portion 22, the third mounting portion 23, and the fourth mounting portion 24 are positioned at the four corners of the inner frame 31, which is roughly rectangular in plan view.

[0085] In the example shown in Figure 12, the first corner 310a of the inner frame 31 is connected (more specifically, welded) to the first mounting part 21, the second corner 310b of the inner frame 31 is connected (more specifically, welded) to the second mounting part 22, the third corner 310c of the inner frame 31 is connected (more specifically, welded) to the third mounting part 23, and the fourth corner 310d of the inner frame 31 is connected (more specifically, welded) to the fourth mounting part 24. In this case, the structural strength of the inner frame 31 is increased.

[0086] The first corner 310a of the inner frame 31 may be connected (more specifically, welded) to the first mounting portion 21 via the first connecting portion M1 described above. Similarly, the second corner 310b of the inner frame 31 may be connected (more specifically, welded) to the second mounting portion 22 via the second connecting portion M2 described above. Furthermore, the third corner 310c of the inner frame 31 may be connected (more specifically, welded) to the third mounting portion 23 via the third connecting portion M3 described above. In addition, the fourth corner 310d of the inner frame 31 may be connected (more specifically, welded) to the fourth mounting portion 24 via the fourth connecting portion M4 described above.

[0087] In the rack frame structure 2, the area inside the inner frame 31 may be hollow. In this case, the rack frame structure 2 becomes lighter.

[0088] Some of the first inner connector 31a, second inner connector 31b, third inner connector 31c, and fourth inner connector 31d may be omitted. For example, the second inner connector 31b and the third inner connector 31c may be omitted.

[0089] (Outer support part 40) In the example shown in Figure 12, the outer support portion 40 has an outer frame 41 that is substantially rectangular in plan view. The outer frame 41 includes a first outer connector 41a, a second outer connector 41b, a third outer connector 41c, and a fourth outer connector 41d. More specifically, the first outer connector 41a is positioned on the first side of the outer frame 41, the second outer connector 41b is positioned on the second side of the outer frame 41, the third outer connector 41c is positioned on the third side of the outer frame 41, and the fourth outer connector 41d is positioned on the fourth side of the outer frame 41.

[0090] When the outer support portion 40 has an outer frame 41 that is roughly rectangular in plan view, the structural strength of the rack frame structure 2 including the outer frame 41 is increased. In the example shown in Figure 12, the outer support portion 40 has an outer frame 41 that is roughly rectangular in plan view, and the inner support portion 30 has an inner frame 31 that is roughly rectangular in plan view, so the structural strength of the rack frame structure 2 is further increased.

[0091] In the example shown in Figure 12, the first mounting portion 21, the second mounting portion 22, the third mounting portion 23, and the fourth mounting portion 24 are positioned at the four corners of the outer frame 41, which is roughly rectangular in plan view.

[0092] In the example shown in Figure 12, the first corner 410a of the outer frame 41 is formed by a part of the first mounting portion 21. Also, the first corner 410a of the outer frame 41 (more specifically, a part of the first mounting portion 21) connects the first outer connector 41a and the second outer connector 41b (more specifically, they are connected by welding). In the example shown in Figure 12, the second corner 410b of the outer frame 41 is formed by a part of the second mounting portion 22. Also, the second corner 410b of the outer frame 41 (more specifically, a part of the second mounting portion 22) connects the first outer connector 41a and the third outer connector 41c (more specifically, they are connected by welding). In the example shown in Figure 12, the third corner 410c of the outer frame 41 is formed by a part of the third mounting portion 23. Furthermore, the third corner 410c of the outer frame 41 (more specifically, a part of the third mounting portion 23) connects the second outer connector 41b and the fourth outer connector 41d (more specifically, they are connected by welding). In the example shown in Figure 12, the fourth corner 410d of the outer frame 41 is formed by a part of the fourth mounting portion 24. Furthermore, the fourth corner 410d of the outer frame 41 (more specifically, a part of the fourth mounting portion 24) connects the third outer connector 41c and the fourth outer connector 41d (more specifically, they are connected by welding).

[0093] In the example shown in Figure 12, the four sides of the inner frame 31 are positioned inside the four sides of the outer frame 41. In the example shown in Figure 12, the entire inner frame 31 is positioned inside the outer frame 41. Furthermore, a double frame is formed by the inner frame 31 and the outer frame 41.

[0094] As illustrated in Figure 12, the quadrilateral formed by connecting the center 21c of the first mounting portion 21, the center 22c of the second mounting portion 22, the center 23c of the third mounting portion 23, and the center 24c of the fourth mounting portion 24 in a plan view is defined as the first quadrilateral RC. In the example shown in Figure 12, in a plan view, the first inner connector 31a (for example, the first upper bar 311a) is located inside the first quadrilateral RC. Also, in a plan view, the first outer connector 41a (for example, the second upper bar 411a) is located outside the first quadrilateral RC. In the example shown in Figure 12, in a plan view, the second inner connector 31b (for example, the third upper bar 311b) is located inside the first quadrilateral RC. Also, in a plan view, the second outer connector 41b (for example, the fourth upper bar 411b) is located outside the first quadrilateral RC. In the example shown in Figure 12, in a plan view, the third inner connector 31c (e.g., the fifth upper bar 311c) is located inside the first quadrilateral RC. Also, in a plan view, the third outer connector 41c (e.g., the sixth upper bar 411c) is located outside the first quadrilateral RC. In the example shown in Figure 12, in a plan view, the fourth inner connector 31d (e.g., the seventh upper bar 311d) is located inside the first quadrilateral RC. Also, in a plan view, the fourth outer connector 41d (e.g., the eighth upper bar 411d) is located outside the first quadrilateral RC.

[0095] Some of the first outer connector 41a, second outer connector 41b, third outer connector 41c, and fourth outer connector 41d may be omitted. For example, if the second outer connector 41b does not need to support the connecting shelf 81, the second outer connector 41b may be omitted. For example, if the third outer connector 41c does not need to support the connecting shelf 81, the third outer connector 41c may be omitted.

[0096] As illustrated in Figure 13, substantially the entirety of the first shelf board 71 may be positioned inside the first rectangular RC described above in a plan view.

[0097] (First mounting portion 21) In the example shown in Figure 12, the first mounting portion 21 includes a first cylindrical body 210 into which the first support column 51 is inserted. The first mounting portion 21 (more specifically, the first cylindrical body 210) is made of metal, for example. The first cylindrical body 210 may be a member that cannot be disassembled into a plurality of arc-shaped parts.

[0098] In the example shown in Figure 12, the second inner connector 31b (for example, the first connector M1 described above, or the third upper bar 311b) is connected (more specifically, welded) to the outer circumferential surface of the first cylindrical body 210. In addition, the first outer connector 41a (for example, the second upper bar 411a) and the second outer connector 41b (for example, the fourth upper bar 411b) are connected (more specifically, welded) to the outer circumferential surface of the first cylindrical body 210.

[0099] (Second mounting section 22) In the example shown in Figure 12, the second mounting portion 22 includes a second cylindrical body 220 into which the second support column 52 is inserted. The second mounting portion 22 (more specifically, the second cylindrical body 220) is made of, for example, metal. The second cylindrical body 220 may be a single component that cannot be disassembled into a plurality of arc-shaped parts.

[0100] In the example shown in Figure 12, the third inner connector 31c (for example, the second connector M2 described above, or the fifth upper bar 311c) is connected (more specifically, welded) to the outer circumferential surface of the second cylindrical body 220. In addition, the first outer connector 41a (for example, the second upper bar 411a) and the third outer connector 41c (for example, the sixth upper bar 411c) are connected (more specifically, welded) to the outer circumferential surface of the second cylindrical body 220.

[0101] (Third mounting section 23) In the example shown in Figure 12, the third mounting portion 23 includes a third cylindrical body 230 into which the third support column 53 is inserted. The third mounting portion 23 (more specifically, the third cylindrical body 230) is made of metal, for example. The third cylindrical body 230 may be a component that cannot be disassembled into a plurality of arc-shaped parts.

[0102] In the example shown in Figure 12, the second inner connector 31b (for example, the third connector M3 described above, or the third upper bar 311b) is connected (more specifically, welded) to the outer circumferential surface of the third cylindrical body 230. In addition, the second outer connector 41b (for example, the fourth upper bar 411b) and the fourth outer connector 41d (for example, the eighth upper bar 411d) are connected (more specifically, welded) to the outer circumferential surface of the third cylindrical body 230.

[0103] (Fourth mounting section 24) In the example shown in Figure 12, the fourth mounting portion 24 includes a fourth cylindrical body 240 into which the fourth support column 54 is inserted. The fourth mounting portion 24 (more specifically, the fourth cylindrical body 240) is made of metal, for example. The fourth cylindrical body 240 may be a member that cannot be disassembled into a plurality of arc-shaped parts.

[0104] In the example shown in Figure 12, the third inner connector 31c (for example, the fourth connector M4 described above, or the fifth upper bar 311c) is connected (more specifically, welded) to the outer circumferential surface of the fourth cylindrical body 240. In addition, the third outer connector 41c (for example, the sixth upper bar 411c) and the fourth outer connector 41d (for example, the eighth upper bar 411d) are connected (more specifically, welded) to the outer circumferential surface of the fourth cylindrical body 240.

[0105] (Rack frame structure 2) In the example shown in Figure 1, the rack frame structure 2 is a single integrated component formed by welding. More specifically, the rack frame structure 2 is a single integrated component formed by welding together the first mounting portion 21, the second mounting portion 22, the third mounting portion 23, the fourth mounting portion 24, the inner support portion 30, and the outer support portion 40.

[0106] The first mounting portion 21, the second mounting portion 22, the third mounting portion 23, the fourth mounting portion 24, the inner support portion 30, and the outer support portion 40 are integrated by welding, which reduces the number of parts in the assembly. In addition, the user can assemble the assembly rack, including the rack frame structure 2, more quickly.

[0107] (Second embodiment) The shelf structure ST in the second embodiment will be described with reference to Figures 1 to 18. Figure 14 is a schematic perspective view illustrating an example of the shelf structure ST in the second embodiment.

[0108] The second embodiment will primarily describe the differences from the first embodiment. On the other hand, the second embodiment will omit repetitive explanations of matters already described in the first embodiment. Therefore, it goes without saying that even if not explicitly explained in the second embodiment, matters already described in the first embodiment can be applied to the second embodiment. Conversely, matters described in the second embodiment are applicable to the first embodiment.

[0109] As illustrated in Figure 14, the shelf structure ST in the second embodiment includes the rack frame structure 2 in the first embodiment, the first shelf board 71, and the connecting shelf board 81.

[0110] The shelf structure ST in the second embodiment provides the same effect as the rack frame structure 2 in the first embodiment.

[0111] (Optional additional configuration) Next, with reference to Figures 1 to 18, we will describe optional additional configurations that can be adopted in the shelf structure ST in the second embodiment.

[0112] In the example shown in Figure 12, the rack frame structure 2 is a frame structure that is roughly rectangular in plan view. Furthermore, the inside of the frame structure is hollow.

[0113] (Receptive space SP1) In the example shown in Figure 6, the receiving space SP1 between the inner support portion 30 and the outer support portion 40 includes a gap GP (more specifically, the first gap GP1 shown in Figure 9) into which both a portion of the connecting shelf 81 (e.g., a projection 813) and a portion of the first shelf 71 (e.g., a projection 713) can be inserted.

[0114] (First shelf board 71) As illustrated in Figure 14, the first shelf 71 has a first shelf section 711. Article OB1 is placed on the first shelf section 711. As illustrated in Figure 14, the first shelf section 711 may be composed of a first plate section 711p. Alternatively, the first shelf section 711 may be composed of a plurality of bars (for example, a plurality of bars including a plurality of vertical bars and a plurality of horizontal bars).

[0115] In the example shown in Figure 6, the first shelf portion 711 is supported by the inner support portion 30 of the rack frame structure 2 (more specifically, it is in contact with the inner support portion 30). The first shelf portion 711 may also be supported by the first inner connector 31a, second inner connector 31b, third inner connector 31c, and fourth inner connector 31d, as illustrated in Figure 10 (more specifically, it may be in contact with them). The first shelf portion 711 may also be supported by the inner frame 31 (more specifically, it may be in contact with the inner frame 31).

[0116] The first shelf section 711 may be supported only by the rack frame structure 2. More specifically, the first shelf section 711 may be supported only by the inner support section 30. Even more specifically, the first shelf section 711 may be supported only by the inner frame 31 (see Figure 12).

[0117] In the example shown in Figure 6, the first shelf 71 has at least one projection 713 that is inserted into the receiving space SP1 between the inner support 30 and the outer support 40. The first shelf 71 may have multiple projections 713 that are inserted into the receiving space SP1 between the inner support 30 and the outer support 40.

[0118] At least one projection 713 protrudes downward from the first shelf portion 711 (more specifically, from the outer peripheral edge 711u of the first shelf portion 711). In the example shown in Figure 14, the outer peripheral edge 711u of the first shelf portion 711 has a substantially rectangular shape.

[0119] The first shelf 71 (for example, the first shelf portion 711 and / or at least one projection 713) is made of, for example, metal. Alternatively, the first shelf 71 (for example, the first shelf portion 711 and / or at least one projection 713) may be made of resin.

[0120] In the example shown in Figure 15, at least one projection 713 includes a first projection 713a that is inserted into a first gap GP1 between a first inner connector 31a and a first outer connector 41a. In the example shown in Figure 15, the longitudinal direction of the first projection 713a is substantially parallel to the article support surface defined by the first shelf portion 711 (more specifically, the short side of the first shelf portion 711). In the example shown in Figure 15, the first projection 713a is inserted into a first gap GP1 between the first side of the inner frame 31 and the first side of the outer frame 41.

[0121] The first projection 713a protrudes downward from the first shelf portion 711 (more specifically, from the first short edge of the first shelf portion 711). The first shelf portion 711 and the first projection 713a may be formed integrally. More specifically, the first plate portion 711p, which functions as the first shelf portion 711, and the first projection 713a may be formed by bending the first plate. The first projection 713a may include a first downward projection 714a that protrudes downward from the first shelf portion 711, and a first inward projection 715a that protrudes inward from the first downward projection 714a.

[0122] The width W1 of the first gap GP1 (see Figure 9) is preferably greater than the width W5 of the first inward projection 715a (see Figure 16). The width W1 of the first gap GP1 may be twice or more the width W5 of the first inward projection 715a.

[0123] In the example shown in Figure 15, at least one projection 713 includes a second projection 713b that is inserted into the second gap GP2 between the second inner connector 31b and the second outer connector 41b. In the example shown in Figure 15, the longitudinal direction of the second projection 713b is substantially parallel to the article support surface defined by the first shelf portion 711 (more specifically, the long side of the first shelf portion 711). Also, the longitudinal direction of the second projection 713b is substantially perpendicular to the longitudinal direction of the first projection 713a. In the example shown in Figure 15, the second projection 713b is inserted into the second gap GP2 between the second side of the inner frame 31 and the second side of the outer frame 41.

[0124] The second projection 713b protrudes downward from the first shelf portion 711 (more specifically, from the first long edge of the first shelf portion 711). The first shelf portion 711 and the second projection 713b may be formed integrally. The second projection 713b may include a second downward projection 714b that protrudes downward from the first shelf portion 711, and a second inward projection 715b that protrudes inward from the second downward projection 714b.

[0125] The width W2 of the second gap GP2 (see Figure 9) is preferably larger than the width W6 of the second inward projection 715b (see Figure 16). The width W2 of the second gap GP2 may be twice or more the width W6 of the second inward projection 715b.

[0126] In the example shown in Figure 15, at least one projection 713 includes a third projection 713c that is inserted into the third gap GP3 between the third inner connector 31c and the third outer connector 41c. In the example shown in Figure 15, the longitudinal direction of the third projection 713c is substantially parallel to the article support surface defined by the first shelf portion 711 (more specifically, the long side of the first shelf portion 711). Also, the longitudinal direction of the third projection 713c is substantially parallel to the longitudinal direction of the second projection 713b. In the example shown in Figure 15, the third projection 713c is inserted into the third gap GP3 between the third side of the inner frame 31 and the third side of the outer frame 41.

[0127] The third projection 713c protrudes downward from the first shelf portion 711 (more specifically, from the second long edge of the first shelf portion 711). The third projection 713c may include a third downward projection 714c that protrudes downward from the first shelf portion 711, and a third inward projection 715c that protrudes inward from the third downward projection 714c.

[0128] The width W3 of the third gap GP3 (see Figure 9) is preferably larger than the width W7 of the third inward projection 715c (see Figure 16). The width W3 of the third gap GP3 may be twice or more the width W7 of the third inward projection 715c.

[0129] In the example shown in Figure 15, at least one projection 713 includes a fourth projection 713d that is inserted into the fourth gap GP4 between the fourth inner connector 31d and the fourth outer connector 41d. In the example shown in Figure 15, the longitudinal direction of the fourth projection 713d is substantially parallel to the article support surface defined by the first shelf portion 711 (more specifically, the short side of the first shelf portion 711). Also, the longitudinal direction of the fourth projection 713d is substantially parallel to the longitudinal direction of the first projection 713a. In the example shown in Figure 15, the fourth projection 713d is inserted into the fourth gap GP4 between the fourth side of the inner frame 31 and the fourth side of the outer frame 41.

[0130] In the example shown in Figure 15, the fourth projection 713d protrudes downward from the first shelf portion 711 (more specifically, from the second short edge of the first shelf portion 711). The fourth projection 713d may include a fourth downward projection 714d that protrudes downward from the first shelf portion 711, and a fourth inward projection 715d that protrudes inward from the fourth downward projection 714d.

[0131] The width W4 of the fourth gap GP4 (see Figure 9) is preferably greater than the width W8 of the fourth inward projection 715d (see Figure 16). The width W4 of the fourth gap GP4 may be more than twice the width W8 of the fourth inward projection 715d.

[0132] The first shelf 71 may be attached to the rack frame structure 2 by only the action of inserting a part of the first shelf 71 (for example, the first projection 713a, or multiple projections 713) into the gap GP between the inner support part 30 and the outer support part 40 (for example, the gap between the inner frame 31 and the outer frame 41) (see Figure 6). In the example shown in Figure 6, the first shelf 71 can be attached to the rack frame structure 2 without using any tools.

[0133] In the example shown in Figure 6, the first shelf 71 can be placed on the rack frame structure 2 (more specifically, the inner support part 30 or the inner frame body 31). The first shelf 71 is also removable from the rack frame structure 2.

[0134] As illustrated in Figure 16, the first shelf board 71 may have a first recess 719a (for example, an arc-shaped first recess) with a shape complementary to the first mounting portion 21, a second recess 719b (for example, an arc-shaped second recess) with a shape complementary to the second mounting portion 22, a third recess 719c (for example, an arc-shaped third recess) with a shape complementary to the third mounting portion 23, and a fourth recess 719d (for example, an arc-shaped fourth recess) with a shape complementary to the fourth mounting portion 24. The first recess 719a may separate the first projection 713a and the second projection 713b.

[0135] As illustrated in Figure 17, the protruding length L1 of the first projection 713a from the first shelf portion 711 may be 1 / 2 or more, 3 / 4 or more, or 1 or more of the height dimension H1 of the first inner connector 31a (more specifically, the distance between the upper end of the first upper bar 311a and the lower end of the first lower bar 312a). Furthermore, the protruding length L1 may be 1 / 2 or more, 3 / 4 or more, or 1 or more of the height dimension H2 of the first outer connector 41a (more specifically, the distance between the upper end of the second upper bar 411a and the lower end of the second lower bar 412a).

[0136] (Connecting shelf board 81) As illustrated in Figure 14, the connecting shelf 81 has a shelf portion 811. Article OB2 is placed on the shelf portion 811. As illustrated in Figure 14, the shelf portion 811 may be composed of a second plate portion 811p. Alternatively, the shelf portion 811 may be composed of multiple bars (for example, multiple bars including multiple vertical bars and multiple horizontal bars).

[0137] In the example shown in Figure 6(b), one end of the shelf portion 811 is supported by the outer support portion 40 of the rack frame structure 2 (for example, the first outer connector 41a). More specifically, one end of the shelf portion 811 is in contact with and supported by the outer support portion 40 of the rack frame structure 2.

[0138] In the example shown in Figure 6, the connecting shelf 81 has a projection 813 that is inserted into the receiving space SP1 between the inner support portion 30 and the outer support portion 40.

[0139] The projection 813 protrudes downward from the shelf portion 811 (more specifically, from the outer peripheral edge 811u of the shelf portion 811). In the example shown in Figure 4, the outer peripheral edge 811u of the shelf portion 811 has a substantially rectangular shape.

[0140] The connecting shelf 81 (for example, the shelf portion 811 and / or the projection 813) is made of, for example, metal. Alternatively, the connecting shelf 81 (for example, the shelf portion 811 and / or the projection 813) may be made of resin.

[0141] In the example shown in Figure 17, the projection 813 is insertable into the first gap GP1 between the first inner connector 31a and the first outer connector 41a. In the example shown in Figure 18, the longitudinal direction of the projection 813 is substantially parallel to the article support surface defined by the shelf portion 811 (more specifically, the short side of the shelf portion 811).

[0142] The projection 813 protrudes downward from the shelf portion 811. More specifically, the projection 813 protrudes downward from the outer peripheral edge of the shelf portion 811. The shelf portion 811 and the projection 813 may be formed integrally. More specifically, the second plate portion 811p, which functions as the shelf portion 811, and the projection 813 may be formed by bending the second plate. The projection 813 may include a downward projection 814 that protrudes downward from the shelf portion 811, and an inward projection 815 that protrudes inward from the downward projection 814.

[0143] The width W1 of the first gap GP1 (see Figure 9) is preferably larger than the width W9 of the inward-facing projection 815 (see Figure 18). The width W1 of the first gap GP1 may be twice or more the width W9 of the inward-facing projection 815.

[0144] The width W1 of the first gap GP1 (see Figure 9) is preferably greater than the sum of the width W5 of the first inward projection 715a of the first shelf board 71 (see Figure 16) and the width W9 of the inward projection 815 of the connecting shelf board 81. In this case, as illustrated in Figures 6(a) and 6(b), the first inward projection 715a of the first shelf board 71 and the inward projection 815 of the connecting shelf board 81 can be easily inserted into the first gap GP1.

[0145] It is preferable that the projection 813 can be selectively inserted into the first gap GP1 (see Figure 15) and the second gap GP2 (see Figure 15) described above. In this case, there is a greater degree of freedom in selecting the position for connecting the connecting shelf 81 to the rack frame structure 2. It is preferable that the projection 813 can be selectively inserted into the first gap GP1, the second gap GP2, the third gap GP3, and the fourth gap GP4 described above. In this case, there is an even greater degree of freedom in selecting the position for connecting the connecting shelf 81 to the rack frame structure 2.

[0146] As illustrated in Figure 17, the protruding length L2 of the projection 813 from the shelf portion 811 of the connecting shelf 81 may be 1 / 2 or more, 3 / 4 or more, or 1 or more of the height dimension H2 of the first outer connecting body 41a (more specifically, the distance between the upper end of the second upper bar 411a and the lower end of the second lower bar 412a). Furthermore, the protruding length L2 may be 1 / 2 or more, 3 / 4 or more, or 1 or more of the height dimension H1 of the first inner connecting body 31a (more specifically, the distance between the upper end of the first upper bar 311a and the lower end of the first lower bar 312a).

[0147] As illustrated in Figure 18, the connecting shelf 81 may include a shelf portion 811, a fifth projection 813a projecting downward from the first side of the outer peripheral edge of the shelf portion 811, a sixth projection 813b projecting downward from the second side of the outer peripheral edge of the shelf portion 811, a seventh projection 813c projecting downward from the third side of the outer peripheral edge of the shelf portion 811, and an eighth projection 813d projecting downward from the fourth side of the outer peripheral edge of the shelf portion 811.

[0148] As illustrated in Figure 17, the shape of the projection 813 (more specifically, the fifth projection 813a) of the connecting shelf 81 may be substantially symmetrical to the shape of the first projection 713a of the first shelf 71. As illustrated in Figure 18, the shape of the sixth projection 813b of the connecting shelf 81 may be substantially symmetrical to the shape of the seventh projection 813c of the connecting shelf 81. The shape of the eighth projection 813d of the connecting shelf 81 may be substantially symmetrical to the shape of the fifth projection 813a of the connecting shelf 81.

[0149] The shape and size of the connecting shelf 81 may be substantially the same as that of the first shelf 71. Alternatively, the shape and size of the connecting shelf 81 may differ from that of the first shelf 71. For example, the length of the long side of the connecting shelf 81 may differ from that of the long side of the first shelf 71, while the length of the short side of the connecting shelf 81 may be substantially the same as that of the short side of the first shelf 71. In other words, the connecting shelf 81 and the first shelf 71 may be equal in width but different in length.

[0150] As illustrated in Figures 6(a) and 6(b), the connecting shelf 81 may be attached to the rack frame structure 2 by only the action of inserting a part of the connecting shelf 81 (for example, a projection 813) into the gap GP between the inner support 30 and the outer support 40 (for example, the first gap GP1 between the first inner connector 31a and the first outer connector 41a). In the example shown in Figure 6, the connecting shelf 81 can be attached to the rack frame structure 2 without the use of tools.

[0151] When the first shelf 71 and the connecting shelf 81 are attached to the rack frame structure 2, the height of the upper surface of the first shelf portion 711 may be equal to the height of the upper surface of the shelf portion 811. As illustrated in Figure 14, when the first shelf 71 and the connecting shelf 81 are attached to the rack frame structure 2, the first shelf portion 711 and the shelf portion 811 may be capable of supporting an item OB3 that is placed across the first shelf portion 711 and the shelf portion 811. The rack frame structure 2 may support the first shelf 71 (more specifically, the entire first shelf 71) and one end of the connecting shelf 81 so that the distance between the first shelf portion 711 and the shelf portion 811 is 20 mm or less, 10 mm or less, or 8 mm or less.

[0152] In the examples shown in Figures 4 and 11, the rack frame structure 2 is capable of supporting one end of the first shelf 71 and the connecting shelf 81 such that the longitudinal direction of the first shelf 71 and the longitudinal direction of the connecting shelf 81 are aligned in a straight line (see Figure 4), and is also capable of supporting one end of the first shelf 71 and the connecting shelf 81 such that the angle between the longitudinal direction of the first shelf 71 and the longitudinal direction of the connecting shelf 81 is 90 degrees (see Figure 11). In this case, there is a great degree of freedom in the arrangement of the connecting shelf 81 relative to the first shelf 71. In the examples shown in Figures 4 and 11, the rack frame structure 2 is capable of connecting the first shelf 71 and the connecting shelf 81 in an I-shape, and is also capable of connecting the first shelf 71 and the connecting shelf 81 in an L-shape.

[0153] In the example shown in Figure 17, the projection 813 of the connecting shelf 81 is positioned opposite the first projection 713a of the first shelf 71. When the first shelf 71 is supported by the rack frame structure 2 as illustrated in Figure 3, it is preferable that the projection 813 of the connecting shelf 81 can be positioned opposite any of the four projections (713a, 713b, 713c, 713d) of the first shelf 71. In this case, any one of the four sides of the first shelf 71 can be selected, and the connecting shelf 81 can be positioned adjacent to the selected side. Therefore, there is a high degree of freedom in positioning the connecting shelf 81 relative to the first shelf 71.

[0154] As illustrated in Figure 18, the connecting shelf 81 has a substantially rectangular shape. Recesses 819 (for example, arc-shaped recesses) may be formed at each of the four corners of the connecting shelf 81.

[0155] (Third embodiment) The assembly rack 1 in the third embodiment will be described with reference to Figures 1 to 29. Figure 19 is a schematic perspective view showing an example of the components of the assembly rack 1 in the third embodiment. Figure 20 is a schematic perspective view showing a combination of the first group of support columns 5 and the first group of couplings 6. Figure 21 is a schematic perspective view showing an example of an assembly AM assembled from the components shown in Figure 19, and an example of several additional components. Figure 22 is a schematic perspective view showing an example of a shelf structure ST. Figure 23 is a schematic perspective view showing an example of the assembly rack 1 in the third embodiment. Figure 24 is a schematic perspective view showing another example of the assembly rack 1 in the third embodiment. Figure 25 is a schematic perspective view showing how the assembly rack 1 shown in Figure 23 is assembled. Figure 26 is a view of the assembly rack 1 shown in Figure 24 from a diagonal downward angle. Figure 27 is a schematic perspective view showing an example of a second frame structure 12. Figure 28 is a schematic perspective view illustrating yet another example of the modular rack 1 in the third embodiment. Figure 29 is a schematic perspective view illustrating yet another example of the modular rack 1 in the third embodiment.

[0156] The third embodiment will primarily describe the differences from the first and second embodiments. On the other hand, the third embodiment will omit repetitive explanations of matters already described in the first or second embodiment. Therefore, it goes without saying that matters already described in the first or second embodiment can be applied to the third embodiment even if they are not explicitly explained. Conversely, matters described in the third embodiment are applicable to the first and second embodiments.

[0157] As illustrated in Figure 19, the assembly rack 1 in the third embodiment comprises (1) a rack frame structure 2 (see the first embodiment), (2) a first group of support columns 5 including a first support column 51, a second support column 52, a third support column 53, and a fourth support column 54, (3) a first group of couplings 6 including a first coupling 61, a second coupling 62, a third coupling 63, and a fourth coupling 64, and (4) a first shelf board 71 supported by the inner support portion 30 of the rack frame structure 2.

[0158] The rack frame structure 2 is supported by the first to fourth support columns 51 to 54 via the first to fourth couplings 61 to 64.

[0159] More specifically, the first coupling 61 is attached to the outside of the first support column 51, and the first coupling 61 supports the first mounting portion 21 of the rack frame structure 2 from inside the first mounting portion 21. The second coupling 62 is attached to the outside of the second support column 52, and the second coupling 62 supports the second mounting portion 22 of the rack frame structure 2 from inside the second mounting portion 22. The third coupling 63 is attached to the outside of the third support column 53, and the third coupling 63 supports the third mounting portion 23 of the rack frame structure 2 from inside the third mounting portion 23. The fourth coupling 64 is attached to the outside of the fourth support column 54, and the fourth coupling 64 supports the fourth mounting portion 24 of the rack frame structure 2 from inside the fourth mounting portion 24.

[0160] The assembly rack 1 in the third embodiment includes a rack frame structure 2, and therefore achieves the same effects as the rack frame structure 2 in the first embodiment. More specifically, shelves can be easily added using the rack frame structure 2.

[0161] (Optional additional configuration) Next, with reference to Figures 1 to 29, we will describe optional additional configurations that can be adopted in the assembly rack 1 in the third embodiment.

[0162] (Support post 5 of the first group) The first group of support columns 5 includes a first support column 51. In the example shown in Figure 20, the first support column 51 has a plurality of annular grooves 51v that can engage with the first coupling 61. The plurality of annular grooves 51v are formed on the outer surface of the first support column 51. In the example shown in Figure 20, the plurality of annular grooves 51v are arranged along a plurality of planes perpendicular to the longitudinal direction of the first support column 51. The first support column 51 is made of, for example, a hollow pipe 51p. The majority of the first support column 51 is made of, for example, metal.

[0163] The first group of support columns 5 includes a second support column 52, a third support column 53, and a fourth support column 54, all positioned parallel to the first support column 51. When "K" is defined as any natural number between 2 and 4, the Kth support column has a plurality of annular grooves that can engage with the Kth coupling. The plurality of annular grooves are formed on the outer surface of the Kth support column. In the example shown in Figure 20, the plurality of annular grooves are arranged along a plurality of planes perpendicular to the longitudinal direction of the Kth support column. The Kth support column is constructed, for example, from a hollow pipe. The majority of the Kth support column is, for example, made of metal. The shape and size of the Kth support column are, for example, identical to the shape and size of the first support column 51.

[0164] (Coupling 6 of Group 1) The first group of couplings 6 includes a first coupling 61 that can be attached to the first support column 51. Preferably, the first coupling 61 can be attached to any of the first support column 51, the second support column 52, the third support column 53, and the fourth support column 54. The first coupling 61 has an inner circumferential surface 61n that can engage with the first support column 51 and an outer circumferential surface 61u that can support the first mounting portion 21 of the rack frame structure 2. In the example shown in Figure 20, the inner circumferential surface 61n has at least one projection 61p (e.g., an annular projection) that can engage with each of the plurality of annular grooves 51v of the first support column 51. In the example shown in Figure 20, the outer circumferential surface 61u is an annular tapered surface (more specifically, the first coupling 61 has a tapered cone shape).

[0165] The first coupling 61 includes a first component 611 and a second component 612. More specifically, the first coupling 61 is formed by combining the first component 611 and the second component 612. The first coupling 61 is attached to the first support column 51 by combining the first component 611 and the second component 612 with the inner surfaces of the first component 611 and the inner surfaces of the second component 612 in contact with the first support column 51.

[0166] By selecting an annular groove 51v from among the multiple annular grooves 51v of the first support column 51 to engage with the first coupling 61, the mounting height of the first coupling 61 to the first support column 51 can be adjusted. The first coupling 61 is mostly made of resin, for example.

[0167] In the example shown in Figure 20, the first group of couplings 6 includes a second coupling 62 that can be attached to the second support column 52, a third coupling 63 that can be attached to the third support column 53, and a fourth coupling 64 that can be attached to the fourth support column 54. Each of the second coupling 62, the third coupling 63, and the fourth coupling 64 may have the same shape and size as the first coupling 61.

[0168] In the example shown in Figure 20, the mounting height of the second coupling 62 to the second support column 52 is adjustable. More specifically, the mounting height of the second coupling 62 to the second support column 52 can be adjusted by selecting the mounting position of the second coupling 62 to the second support column 52. Similarly, in the example shown in Figure 20, the mounting height of the third coupling 63 to the third support column 53 is adjustable, and the mounting height of the fourth coupling 64 to the fourth support column 54 is adjustable.

[0169] (First shelf board 71) The first shelf 71 is supported by the rack frame structure 2. The first shelf 71 may also be supported by the rack frame structure 2 alone. In the example shown in Figure 21, most of the first shelf 71 is located inside a rectangle formed by the first column 51, the second column 52, the third column 53, and the fourth column 54 at its corners, in plan view.

[0170] Since the first shelf board 71 has already been described in the second embodiment, a repeated explanation of the first shelf board 71 will be omitted.

[0171] (Connecting shelf board 81) As illustrated in Figure 21, the modular rack 1 may include connecting shelves 81. In the example shown in Figure 22, the majority of the connecting shelves 81 are located outside the rectangle formed by the first column 51, second column 52, third column 53, and fourth column 54 as corners, in plan view. Substantially the entirety of the connecting shelves 81 is located outside the first rectangle RC (see Figure 12) described above, in plan view.

[0172] Since the connecting shelf 81 has already been described in the second embodiment, a repeated explanation of the connecting shelf 81 will be omitted.

[0173] (First rack 100A, and support structure 10B) As illustrated in Figures 23 and 24, the modular rack 1 in the third embodiment may include a first rack 100A and a support structure 10B (for example, a second rack 100B).

[0174] As illustrated in Figures 23 and 24, the first rack 100A comprises (1) a rack frame structure 2, (2) a first group of support columns 5 including a first support column 51, a second support column 52, a third support column 53, and a fourth support column 54, (3) a first group of couplings 6 including a first coupling 61, a second coupling 62, a third coupling 63, and a fourth coupling 64, and (4) a first shelf board 71 supported by the inner support portion 30 of the rack frame structure 2. The rack frame structure 2, the first group of support columns 5, and the first group of couplings 6 have already been described, so a repetitive explanation of these components will be omitted.

[0175] As illustrated in Figures 23 and 24, the support structure 10B comprises (1) a second group of support columns 15, (2) a second group of couplings 16, and (3) structural members SD attached to the second group of support columns 15 via the second group of couplings 16.

[0176] In the example shown in Figure 23, the modular rack 1 includes a connecting shelf 81 that connects the first rack 100A (more specifically, the rack frame structure 2) and the support structure 10B (more specifically, the structural member SD). In the example shown in Figure 24, the modular rack 1 includes a connecting shelf 81 that connects the first rack 100A (more specifically, the rack frame structure 2) and the support structure 10B (more specifically, the second frame structure 12 which is the structural member SD).

[0177] In the examples shown in Figures 23 and 24, the load acting on the connecting shelf 81 (more specifically, the load received by the connecting shelf 81 from the items placed on it, and the gravitational force acting on the connecting shelf 81) can be suitably distributed between the rack frame structure 2 and the structural member SD.

[0178] As illustrated in Figure 6, one end E1 of the connecting shelf 81 is supported by the outer support portion 40 of the rack frame structure 2. A portion of the connecting shelf 81 (for example, a projection 813) is received in the receiving space SP1 (more specifically, the first gap GP1) between the inner support portion 30 and the outer support portion 40 of the rack frame structure 2.

[0179] As illustrated in Figure 6, one end E2 of the first shelf 71 is supported by the inner support portion 30 of the rack frame structure 2. A portion of the first shelf 71 (for example, the first projection 713a) is received in the receiving space SP1 (more specifically, the first gap GP1) between the inner support portion 30 and the outer support portion 40 of the rack frame structure 2.

[0180] The modular rack 1 shown in Figures 23 and 24 includes a rack frame structure 2, and therefore achieves the same effects as the rack frame structure 2 in the first embodiment. More specifically, shelves can be easily added using the rack frame structure 2.

[0181] In the example shown in Figure 23, the support structure 10B is a non-rack type support structure, and the structural member SD attached to the second group of support columns 15 via the second group of couplings 16 is a linear structural member.

[0182] On the other hand, in the example shown in Figure 24, the support structure 10B is the second rack 100B, and the structural member SD attached to the second group of support columns 15 via the second group of couplings 16 is the second frame structure 12. More specifically, the second rack 100B comprises (1) the second group of support columns 15, (2) the second group of couplings 16, (3) the second frame structure 12 attached to the second group of support columns 15 via the second group of couplings 16, and (4) the second shelf board 72 supported by the second frame structure 12.

[0183] (Support post 15 of the second group) In the example shown in Figure 23, the second group of support posts 15 includes the fifth support post 151 and the sixth support post 152. In the example shown in Figure 24, the second group of support posts 15 includes the fifth support post 151, the sixth support post 152, the seventh support post 153, and the eighth support post 154.

[0184] (Coupling 16 of Group 2) The couplings 16 of the second group can be attached to the support columns 15 of the second group. In the example shown in Figure 23, the couplings 16 of the second group include the fifth coupling 161 and the sixth coupling 162. In the example shown in Figure 23, the fifth coupling 161 can be attached to the fifth support column 151, and the sixth coupling 162 can be attached to the sixth support column 152. In the example shown in Figure 21, the couplings 16 of the second group include the fifth coupling 161, the sixth coupling 162, the seventh coupling 163, and the eighth coupling 164. In the example shown in Figure 21, the fifth coupling 161 can be attached to the fifth support column 151, the sixth coupling 162 can be attached to the sixth support column 152, the seventh coupling 163 can be attached to the seventh support column 153, and the eighth coupling 164 can be attached to the eighth support column 154.

[0185] The shape and size of each of the couplings 16 in the second group (for example, the fifth coupling 161, the sixth coupling 162, the seventh coupling 163, and the eighth coupling 164) may be the same as, for example, the shape and size of the first coupling 61.

[0186] (Structural member SD) In the example shown in Figure 25, the structural member SD attached to the second group of support columns 15 via the second group of couplings 16 includes: (1) a fifth mounting portion 121 attached to the fifth support column 151 via the fifth coupling 161; (2) a sixth mounting portion 122 attached to the sixth support column 152 via the sixth coupling 162; (3) a linear first support portion 130a connecting the fifth mounting portion 121 and the sixth mounting portion 122; and (4) a linear second support portion 140a connecting the fifth mounting portion 121 and the sixth mounting portion 122. A second receiving space SP2 (more specifically, a gap GS) capable of receiving the projection 817 of the connecting shelf board 81 is formed between the second support portion 140a and the second support portion 140a. In the example shown in Figure 25, the first support portion 130a and the second support portion 140a are parallel. In the example shown in Figure 25, the second receiving space SP2 is an elongated gap that extends along the direction of extension of the second support portion 140a.

[0187] In the example shown in Figure 25, the projection 813 at one end of the connecting shelf 81 is received in the receiving space SP1 between the inner support portion 30 and the outer support portion 40 of the rack frame structure 2, and the projection 817 at the other end of the connecting shelf 81 is received in the second receiving space SP2 between the first support portion 130a and the second support portion 140a.

[0188] In the example shown in Figure 23, the modular rack 1 has two shelves (71, 81) aligned in the same plane. In this case, generally eight support posts are required. In contrast, in the example shown in Figure 23, the two shelves (71, 81) aligned in the same plane can be supported using fewer than eight support posts (for example, using six support posts).

[0189] (Second frame structure 12) The second frame structure 12 is attached to the second group of support columns 15 via the second group of couplings 16.

[0190] In the example shown in Figure 24, the second frame structure 12 includes a fifth mounting portion 121 attached to the fifth support column 151 via a fifth coupling, a sixth mounting portion 122 attached to the sixth support column 152 via a sixth coupling, a seventh mounting portion 123 attached to the seventh support column 153 via a seventh coupling, and an eighth mounting portion 124 attached to the eighth support column 154 via an eighth coupling.

[0191] In the example shown in Figure 26, the second frame structure 12 includes (1) an inner support portion 130 that supports the second shelf 72 of the second rack 100B, and (2) an outer support portion 140 that supports the other end E3 of the connecting shelf 81 that connects the first rack 100A and the second rack 100B. In the example shown in Figure 26, one end E1 of the connecting shelf 81 is supported by the outer support portion 40 of the rack frame structure 2, and the other end E3 of the connecting shelf 81 is supported by the outer support portion 140 of the second frame structure 12.

[0192] In the example shown in Figure 26, a second receiving space SP2 (more specifically, a gap GS1) is formed between the inner support portion 130 and the outer support portion 140 of the second frame structure 12 to receive another part of the connecting shelf 81 (for example, another projection 817). In the example shown in Figure 26, the second receiving space SP2 is an elongated gap that extends along the extending direction of the outer support portion 140.

[0193] In the example shown in Figure 24, the modular rack 1 has three shelves (71, 81, 72) arranged in the same plane. In this case, generally 12 support posts are required. In contrast, in the example shown in Figure 24, the three shelves (71, 81, 72) arranged in the same plane can be supported using fewer than 12 support posts (for example, using 8 support posts).

[0194] In the example shown in Figure 26, the second frame structure 12 (more specifically, the inner support portion 130) has a fifth inner connecting body 131a that connects the fifth mounting portion 121 and the sixth mounting portion 122 and supports the second shelf board 72. In the example shown in Figure 27, the fifth inner connecting body 131a has an upper bar 1311a, a lower bar 1312a, and a corrugated bar 1313a that connects the upper bar 1311a and the lower bar 1312a.

[0195] In the example shown in Figure 26, the second frame structure 12 (more specifically, the outer support portion 140) has a fifth outer connecting body 141a that connects the fifth mounting portion 121 and the sixth mounting portion 122 and is capable of supporting the other end of the connecting shelf board 81. In the example shown in Figure 27, the fifth outer connecting body 141a has an upper bar 1411a, a lower bar 1412a, and a corrugated bar 1413a that connects the upper bar 1411a and the lower bar 1412a.

[0196] In the example shown in Figure 26, a gap GS1 is formed between the fifth inner connector 131a and the fifth outer connector 141a, which is capable of receiving the projection 817 provided at the other end of the connecting shelf 81.

[0197] In the example shown in Figure 27, the second frame structure 12 (more specifically, the inner support portion 130) has a sixth inner connector 131b that connects the fifth mounting portion 121 and the seventh mounting portion 123 and supports the second shelf board 72. In the example shown in Figure 27, the second frame structure 12 (more specifically, the outer support portion 140) has a sixth outer connector 141b that connects the fifth mounting portion 121 and the seventh mounting portion 123 and is capable of supporting one end of the second connecting shelf board 82 (see Figure 29). A gap GS2 capable of receiving a projection provided at one end of the second connecting shelf board 82 (see Figure 29) may be formed between the sixth inner connector 131b and the sixth outer connector 141b.

[0198] In the example shown in Figure 27, the second frame structure 12 (more specifically, the inner support portion 130) has a seventh inner connector 131c that connects the sixth mounting portion 122 and the eighth mounting portion 124 and supports the second shelf board 72. In the example shown in Figure 27, the second frame structure 12 (more specifically, the outer support portion 140) has a seventh outer connector 141c that connects the sixth mounting portion 122 and the eighth mounting portion 124. A gap GS3 capable of receiving a projection provided at one end of another connecting shelf board may be formed between the seventh inner connector 131c and the seventh outer connector 141c.

[0199] In the example shown in Figure 27, the second frame structure 12 (more specifically, the inner support portion 130) has an eighth inner connector 131d that connects the seventh mounting portion 123 and the eighth mounting portion 124 and supports the second shelf board 72. In the example shown in Figure 27, the second frame structure 12 (more specifically, the outer support portion 140) has an eighth outer connector 141d that connects the seventh mounting portion 123 and the eighth mounting portion 124. A gap GS4 capable of receiving a projection provided at one end of another connecting shelf board may be formed between the eighth inner connector 131d and the eighth outer connector 141d.

[0200] In the example shown in Figure 27, the second frame structure 12 (more specifically, the inner support portion 130) has a second inner frame body 131 that is substantially rectangular in plan view. The second frame structure 12 (more specifically, the outer support portion 140) has a second outer frame body 141 that is substantially rectangular in plan view.

[0201] In the example shown in Figure 27, the fifth mounting portion 121, the sixth mounting portion 122, the seventh mounting portion 123, the eighth mounting portion 124, the inner support portion 130, and the outer support portion 140 are integrated by welding.

[0202] The second frame structure 12 may have the same structure as the rack frame structure 2 in the first embodiment. The shape and size of the second frame structure 12 may be the same as the shape and size of the rack frame structure 2 in the first embodiment.

[0203] (First additional shelf board 76a) As illustrated in Figure 24, the modular rack 1 may include a first additional shelf 76a. The first additional shelf 76a is positioned vertically above the first shelf 71. Alternatively, the first additional shelf 76a may be positioned vertically below the first shelf 71.

[0204] The modular rack 1 may include (2) a third group coupling 17a attached to the first group of support columns 5, (3) a third frame structure 13a attached to the first group of support columns 5 via the third group coupling 17a, and (4) a first additional shelf 76a supported by the third frame structure 13a. The shape and size of the third frame structure 13a may be the same as the shape and size of the rack frame structure 2 in the first embodiment.

[0205] (Second additional shelf board 76b) As illustrated in Figure 24, the modular rack 1 may include a second additional shelf 76b. The second additional shelf 76b is positioned vertically above the second shelf 72. Alternatively, the second additional shelf 76b may be positioned vertically below the second shelf 72.

[0206] The modular rack 1 may include (2) a coupling 17b of the fourth group attached to the support columns 15 of the second group, (3) a fourth frame structure 13b attached to the support columns 15 of the second group via the coupling 17b of the fourth group, and (4) a second additional shelf 76b supported by the fourth frame structure 13b. The shape and size of the fourth frame structure 13b may be the same as the shape and size of the second frame structure 12.

[0207] (Additional connecting shelf board 86a) As illustrated in Figure 24, the modular rack 1 may include an additional connecting shelf 86a that connects the first rack 100A and the second rack 100B. The additional connecting shelf 86a is positioned vertically above the connecting shelf 81. Alternatively, the additional connecting shelf 86a may be positioned vertically below the connecting shelf 81.

[0208] In the example shown in Figure 24, one end of the additional connecting shelf 86a is supported by the third frame structure 13a. In the example shown in Figure 24, the other end of the additional connecting shelf 86a is supported by the fourth frame structure 13b.

[0209] As illustrated in Figure 24, the modular rack 1 may include (1) a first rack 100A, (2) a second rack 100B, and (3) a connecting shelf 81 that connects the first rack 100A and the second rack 100B in a roughly I-shape in plan view. The first rack 100A, the second rack 100B, and the connecting shelf 81 have already been described, so a repetitive explanation of their configurations will be omitted.

[0210] As illustrated in Figure 28, the modular rack 1 may comprise (1) a first rack 100A, (2) a second rack 100B, and a connecting shelf 81 that connects (1) the first rack 100A and the second rack 100B in a roughly L-shape in plan view. The first rack 100A, the second rack 100B, and the connecting shelf 81 have already been described, so a repetitive explanation of their configurations will be omitted.

[0211] As illustrated in Figure 29, the modular rack 1 may include (1) a first rack 100A, (2) a second rack 100B, (3) a third rack 100C, (4) a connecting shelf 81 that connects the first rack 100A and the second rack 100B in a roughly I-shape in plan view, and (5) a second connecting shelf 82 that connects the second rack 100B and the third rack 100C in a roughly L-shape in plan view. The first rack 100A, the second rack 100B, and the connecting shelf 81 have already been described, so a repetitive explanation of their configurations will be omitted.

[0212] (Rack 3, 100C) The third rack 100C includes a plurality of support columns 95, a plurality of couplings 96, a frame structure 92 attached to the plurality of support columns 95 via the plurality of couplings 96, and a third shelf board 73 supported by the frame structure 92. The frame structure 92 may have a structure similar to that of the rack frame structure 2 in the first embodiment.

[0213] (Second connecting shelf board 82) The second connecting shelf 82 connects the second frame structure 12 of the second rack 100B to the frame structure 92 of the third rack 100C. The second connecting shelf 82 may have the same structure as the connecting shelf 81.

[0214] The present invention is not limited to the embodiments or modifications described above, and it is clear that each embodiment or modification can be appropriately modified or changed within the scope of the technical concept of the present invention. Furthermore, the various technologies used in each embodiment or modification can be applied to other embodiments or other modifications, as long as no technical inconsistencies arise. In addition, any optional additional configurations in each embodiment or modification can be omitted as appropriate. [Explanation of Symbols]

[0215] 1: Assembly-type rack 2: Rack frame structure 5: Prop 6: Coupling 10B: Support structure 12: Second Frame Structure 13a: Third frame structure 13b: Fourth Frame Structure 15: Strut 16: Coupling 17a: Coupling 17b: Coupling 21: First mounting section 21c: Center of the first mounting section 22: Second mounting section 22c: Center of the second mounting section 23: Third mounting section 23c: Center of the third mounting section 24: Fourth mounting section 24c: Center of the fourth mounting section 30:Inner support part 31: Inner frame 31a: First inner connector 31b: Second inner connector 31c: Third inner connector 31d: 4th inner connector 40:Outer support part 41:Outer frame body 41a: First outer connector 41b: Second outer connector 41c: Third outer connector 41d: 4th outer connector 51:1st pillar 51p: Hollow pipe 51v: Ring groove 52:Second pillar 53: 3rd pillar 54: 4th pillar 61: First coupling 61n: Inner surface 61p:Protrusion 61u: Outer surface 62: Second coupling 63: Third coupling 64: 4th coupling 71: First shelf 72: Second shelf 73: Third shelf 76a: First additional shelf 76b: Second additional shelf 81: Connecting shelf 82: Second connecting shelf 86a: Additional connecting shelf 92: Frame structure 95: Strut 96: Coupling 100A: Rack 1 100B: Rack 2 100C: Rack 3 121: Fifth mounting section 122: 6th mounting section 123: Mounting section #7 124: Eighth mounting part 130: Inner support part 130a: First support part 131: Second inner frame body 131a: Fifth inner connecting body<> 131b: Sixth inner connecting body 131c: Seventh inner connecting body 131d: Eighth inner connecting body 140: Outer support part 140a: Second support part 141: Second outer frame body 141a: Fifth outer connecting body 141b: Sixth outer connecting body 141c: Seventh outer connecting body 141d: Eighth outer connecting body 151: Fifth pillar 152: Sixth pillar 153: Seventh pillar 154: Eighth pillar 161: Fifth coupling 162: Sixth coupling 163: Seventh coupling 164: Eighth coupling 210: First cylindrical body 215b: Part of the first mounting part[[ID=5*0]] 216a: Part of the first mounting part 216b: Part of the first mounting part 217a: Part of the first mounting part 217b: Part of the first mounting part 220: Second cylindrical body 224c: Part of the second mounting part 226a: Part of the second mounting part 226c: Part of the second mounting part 227a: Part of the second mounting part 227c: Part of the second mounting part 230: Third cylindrical body 235b: Part of the third mounting part[[ID=*74]] 236b: Part of the third mounting part 237b: Part of the third mounting part 240: Fourth cylindrical body 244c: Part of the fourth attachment portion 246c: Part of the fourth attachment portion 247c: Part of the fourth attachment portion 310a: First corner 310b: Second corner 310c: Third corner 310d: Fourth corner 311a: First upper bar 311b: Third upper bar 311c: Fifth upper bar 311d: Seventh upper bar 312a: First lower bar 312b: Third lower bar 312c: Fifth lower bar 312d: Seventh lower bar 313a: First wavy bar 313b: Third wavy bar 313c: Fifth wavy bar 313d: Seventh wavy bar 410a: First corner 410b: Second corner 410c: Third corner 410d: Fourth corner 411a: Second upper bar 411b: Fourth upper bar 4​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​ 713a: 1st protrusion 713b:Second protrusion 713c: Third protrusion 713d: 4th protrusion 714a: First downward protrusion 714b: Second downward protrusion 714c: Third downward protrusion 714d: 4th downward protrusion 715a: First inward projection 715b: Second inward projection 715c: Third inward projection 715d: Fourth inward projection 719a: First recess 719b: Second recess 719c: Third recess 719d: Fourth recess 811: Shelf section 811p: 2nd plate part 811u: Outer edge 813: protrusion 813a: Fifth projection 813b: 6th protrusion 813c: 7th projection 813d: 8th projection 814 :Downward protrusion 815: Inward-facing projection 817: protrusion 819: Recess 1311a: Top bar 1312a: Bottom bar 1313a: Wavy bar 1411a: Top bar 1412a: Bottom bar 1413a: Wavy bar AM: Assembly CT: Storage box E1: One end of a connecting shelf board E2: One end of the first shelf E3: Other end of connecting shelf FK: Hook GP: Gap GP1: First gap GP2: Second gap GP3: Third gap GP4: 4th gap GS: Gap GS1: Gap GS2: Gap GS3: Gap GS4: Gap H1: Height dimension of the first inner connecting body H2: Height dimension of the first outer connecting body M1: 1st joint M2: 2nd joint M3: 3rd joint M4: 4th joint OB1, OB2, OB3: Goods RC: 1st rectangle SD: Structural member SP1: Receptive space SP2: Second Receptive Space ST:Shelf structure e1, e2, e3, e4, e5, e7, e8, e9, e10: One end f1, f2, f3, f4, f5, f6, f7, f8, f9, f10: Other end

Claims

1. A first mounting portion is attached to the first support column via a first coupling, A second mounting portion is attached to the second support column via a second coupling, A third mounting portion attached to the third support column via a third coupling, A fourth mounting portion is attached to the fourth support column via a fourth coupling, The inner support part that supports the first shelf board, Outer support part that supports the connecting shelf board and It is equipped with, A receiving space for receiving a portion of the connecting shelf is formed between the inner support portion and the outer support portion. Rack frame structure.

2. The inner support portion has a first inner connecting body that connects the first mounting portion and the second mounting portion. The outer support portion has a first outer connecting body that connects the first mounting portion and the second mounting portion. A rack frame structure according to claim 1.

3. The first outer connector is The top bar and The bottom bar and A corrugated bar connecting the upper bar and the lower bar. has The rack frame structure according to claim 2.

4. The inner support portion has an inner frame that is substantially rectangular in plan view, The outer support portion has an outer frame that is substantially rectangular in plan view. A rack frame structure according to claim 1.

5. The first mounting portion, the second mounting portion, the third mounting portion, the fourth mounting portion, the inner support portion, and the outer support portion are integrated by welding. A rack frame structure according to any one of claims 1 to 4.

6. A rack frame structure according to any one of claims 1 to 4, The first shelf board and, The aforementioned connecting shelf and including Shelf structure.

7. The receiving space between the inner support portion and the outer support portion includes a gap into which both a portion of the connecting shelf and a portion of the first shelf can be inserted. The shelf structure according to claim 6.

8. The first shelf can be attached to the rack frame structure by simply inserting a portion of the first shelf into the gap. The connecting shelf can be attached to the rack frame structure by simply inserting a portion of the connecting shelf into the gap. The shelf structure according to claim 7.

9. A rack frame structure according to claim 4, The first shelf board and, The aforementioned connecting shelf and Includes, The first shelf board is, The first shelf portion is supported by the aforementioned inner frame, A first projection is inserted into the first gap between the first side of the inner frame and the first side of the outer frame, A second projection is inserted into the second gap between the second side of the inner frame and the second side of the outer frame, A third projection is inserted into the third gap between the third side of the inner frame and the third side of the outer frame, A fourth projection is inserted into the fourth gap between the fourth side of the inner frame and the fourth side of the outer frame. has Shelf structure.

10. A rack frame structure according to any one of claims 1 to 4, A first group of support columns including the first support column, the second support column, the third support column, and the fourth support column, A first group of couplings including the first coupling, the second coupling, the third coupling, and the fourth coupling, The first shelf board is supported by the inner support portion of the rack frame structure. Equipped with Assembly-type rack.

11. A first rack comprising: a rack frame structure according to any one of claims 1 to 4; a first group of support columns including the first support column, the second support column, the third support column, and the fourth support column; a first group of couplings including the first coupling, the second coupling, the third coupling, and the fourth coupling; and the first shelf supported by the inner support portion of the rack frame structure; A support structure comprising a second group of support columns, a second group of couplings, and structural members attached to the second group of support columns via the second group of couplings, The connecting shelf plate connects the rack frame structure and the structural member. Equipped with Assembly-type rack.

12. A first rack comprising: a rack frame structure according to any one of claims 1 to 4; a first group of support columns including the first support column, the second support column, the third support column, and the fourth support column; a first group of couplings including the first coupling, the second coupling, the third coupling, and the fourth coupling; and the first shelf supported by the inner support portion of the rack frame structure; A second rack comprising: a second group of support columns; a second group of couplings; a second frame structure attached to the second group of support columns via the second group of couplings; and a second shelf supported by the second frame structure. The connecting shelf plate connects the rack frame structure and the second frame structure. It is equipped with, A second receiving space is formed between the inner support portion and the outer support portion of the second frame structure, which receives the other part of the connecting shelf board. Assembly-type rack.

Images