Cubicle and its installation method

Abstract

To efficiently perform installation of a cubicle and wiring work. [Solution] A cubicle that houses electrical equipment comprises a main frame including columns and beams, and a lower base structure 14 that supports the main frame. The lower base structure 14 includes at least two first members 16 that are substantially horizontal and extend substantially parallel to each other, and one or more second members 10 that connect the first members 6 together. The first members 6 and second members 10 are configured to form a frame shape in a plan view that has at least one open side that is at least partially interrupted.

Description

[Technical Field]

[0001] The present invention relates to a cubicle that houses electrical equipment that converts power supplied from an electric power company or the like into power that can be used within a facility, and to a method for installing the same. [Background technology]

[0002] Cubicle-type electrical equipment (hereinafter simply referred to as cubicles) that is installed outdoors or indoors is widely used. Such cubicles generally have a structure such as that disclosed in Patent Document 1 below, for example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2024-021925 Summary of the Invention [Problem to be solved by the invention]

[0004] When installing a cubicle, it was necessary to first install a grounded metal box (enclosure) before wiring the interior. In other words, for each cubicle to be installed, work such as running electrical wires to the cubicle had to be performed after the enclosure was installed. Because the wiring work had to be done after the enclosure was installed, especially at sites where multiple cubicles were being installed, it was necessary to secure workers for each task over multiple days, or to secure workers only on specific days, which led to problems such as lengthening the construction period.

[0005] The present invention has been made in view of the above-mentioned problems, and aims to provide a cubicle and an installation method thereof that enable cubicle installation and wiring work to be carried out efficiently. [Means for solving the problem]

[0006] A cubicle according to one aspect of the present invention is a cubicle for accommodating electrical equipment, and comprises a main frame including pillars and beams, and a lower base structure supporting the main frame, wherein the lower base structure includes at least two first members that are substantially horizontal and extend substantially parallel to each other, and one or more second members that connect the first members, and the first and second members are configured so that, when viewed in a plane, they form a frame shape overall having at least one open edge that is at least partially interrupted.

[0007] With this configuration, it is possible to move electric wires between the inside and outside of the cubicle through the open edge of the lower base structure while the cubicle remains installed. For example, even when electric wires are already wired at the installation location of the cubicle, it is possible to temporarily place the existing electric wires outside the installation location and then move the existing electric wires inside the cubicle after installing the cubicle. Since the wiring work can be completed even before the cubicle itself is installed, the cubicle installation and wiring work can be carried out efficiently.

[0008] In the above-described aspect, the lower base structure may have a third member connected to the ends of at least two of the first members so as to be located at a discontinued portion of the open edge, the third member being detachably connected to the first members, and the first member, second member and third member may be configured to form, as a whole, a closed frame shape with a closed outer periphery when viewed in a plane.

[0009] This configuration ensures that the open sides are secured when wiring is introduced or when the unit is being installed, and once the work is complete, the third member is attached to close the periphery, creating a closed frame shape. Therefore, when in use, a cubicle with the same lower base structure as before can be constructed.

[0010] In addition, in the above-mentioned aspect, the at least two first members may be channel steel or H-shaped steel, and may be configured so that the ends of each first member are exposed to the outside when the third member is removed.

[0011] With this configuration, when using work equipment such as a forklift to transport equipment into the cubicle, ample space can be secured in the lower framework to insert the forks, etc., making the work easier.

[0012] In the above aspect, the lower base structure may be configured so that heavy equipment constituting the electrical equipment is disposed above the lower base structure.

[0013] With this configuration, heavy equipment such as a transformer can be easily carried into the cubicle using a work tool such as a forklift.

[0014] In addition, in the above-mentioned aspect, the main frame may include a lower frame located below and fixed to the lower base structure, and the lower frame may be configured to have at least two first frame members arranged approximately parallel to the first member, and detachable members arranged detachably at the ends of each first frame member so as to straddle the at least two first frame members.

[0015] With this configuration, the electric wires can be moved between the inside and outside of the cubicle through the gap between the open edge of the lower base structure and the first frame member. By attaching and detaching the detachable member, it is possible to achieve both accessibility during installation and protection after installation.

[0016] In addition, an installation method according to another aspect of the present invention is a cubicle installation method according to the above aspect, and includes a wire temporary placement process in which existing electric wires, which have been pre-arranged so that they can be wired from the underside of the cubicle to be installed into the interior of the cubicle, are pulled out and temporarily placed outside the installation position of the cubicle in a planar view, a cubicle installation process in which, after the wire temporary placement process, the cubicle is installed at the installation position, and a wiring process in which, after the cubicle installation process, the existing electric wires are raised from their temporarily placed state, passed through the open edge of the lower base structure, and wired into the interior of the cubicle.

[0017] This installation method allows wiring work to be completed even before the cubicle body is installed, making it possible to efficiently install the cubicle and perform wiring work.

[0018] In addition, an installation method according to another aspect of the present invention is a cubicle installation method according to the above aspect, and includes an electric wire temporary placement process in which existing electric wires, which have been pre-arranged so that they can be wired from the underside of the cubicle to be installed into the interior of the cubicle, are pulled out and temporarily placed outside the installation position of the cubicle in a planar view; a cubicle installation process in which, after the electric wire temporary placement process, the cubicle is installed in the installation position; a delivery process in which, after the cubicle installation process, heavy equipment placed on the forks of a forklift is delivered into the interior of the cubicle through the open edge of the lower base structure; a post-delivery process in which, after the delivery process, the forks are removed from between at least two first members; a wiring process in which, after the delivery process, the existing electric wires are raised from their temporarily placed state and passed through the open edge of the lower base structure to be wired into the interior of the cubicle; and a cover process in which, after the wiring process, a third member is attached to at least two first members.

[0019] This installation method allows wiring work to be completed even before the cubicle itself is installed, and also allows heavy equipment to be efficiently transported into the cubicle, making cubicle installation work easier. [Effects of the Invention]

[0020] According to the present invention, cubicle installation and wiring work can be carried out efficiently. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a front view of a cubicle according to one embodiment of the present invention; [Figure 2] A front view showing the cubicle with the door removed. [Figure 3] Right side view of the cubicle [Figure 4]FIG. 1 is a plan view showing a lower base structure 14 of the cubicle 10. [Figure 5] FIG. 1 is a plan view showing the main body frame 12 of the cubicle 10. [Figure 6] 1 is a plan view showing a state in which the opening 34 is formed. [Figure 7] FIG. 1 is a first diagram illustrating an example of a method for installing a cubicle 10 according to the present embodiment. [Figure 8] FIG. 2 is a second diagram illustrating an example of the installation method. [Figure 9] FIG. 3 is a third diagram illustrating an example of the installation method. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0023] In the following description, coordinates shown in the drawings are common to all the drawings. The Z direction of the coordinate system is the direction perpendicular to the horizontal plane. The X direction is the direction perpendicular to the Z direction. The Y direction is the direction perpendicular to the Z direction and perpendicular to the X direction. The Z direction is sometimes referred to as the up-down direction (the positive direction on the Z axis when viewed from the origin is up), the X direction is sometimes referred to as the front-to-back direction (the positive direction on the X axis when viewed from the origin is back), and the Y direction is sometimes referred to as the left-to-right direction (the positive direction on the Y axis when viewed from the origin is right).

[0024] In the following, the shape and positional relationship of each part may be explained by indicating a certain direction, but the specified direction is merely for the convenience of explanation and does not limit the orientation or posture of the cubicle etc. according to the present invention. Furthermore, expressions indicating directions or expressions indicating states such as horizontal, vertical, or orthogonal only indicate that they can be roughly understood as such, and should not necessarily be interpreted strictly as such.

[0025] (Embodiment)

[0026] Fig. 1 is a front view of a cubicle according to one embodiment of the present invention, Fig. 2 is a front view showing the cubicle with a door removed, and Fig. 3 is a right side view of the cubicle.

[0027] The cubicle 10 is a box-shaped facility that houses high-voltage power receiving equipment and is mainly installed outdoors or indoors. In this embodiment, the cubicle 10 has a configuration in which, for example, three box-shaped units are connected in a row in the left-right direction. Each unit may be detachable, or the number of connected units may be adjustable depending on the site conditions. A sloped roof 51 is attached to the top of the cubicle 10 to prevent rainwater from entering, and a lockable door 52 is located on the front. As shown in FIG. 2 , the interior contains a distribution board 53 containing circuit breakers and instruments, heavy equipment 36 such as transformers, switches, etc., and the door 52 can be opened to allow inspection and operation. The door 52 is located on both the front and rear sides, but is not limited to this. The configuration of the cubicle 10 is not limited to this. For example, the cubicle 10 may have only one or two units, or four or more units. Furthermore, the cubicle 10 is not limited to housing high-voltage power receiving equipment, but may, for example, house only a distribution board as electrical equipment that distributes low-voltage electricity to various uses, or may house electrical equipment including a generator and a distribution board.

[0028] As shown in Figures 1 and 2, the cubicle 10 has an outer box constructed by combining a steel frame structure with wall panels, doors, etc. The cubicle 10 meets the structural requirements stipulated in a predetermined standard and has the function of protecting the high-voltage power receiving equipment inside from the external environment. For the sake of convenience, the front door has been removed in Figure 2 to show the internal structure.

[0029] The cubicle 10 is installed, for example, on an installation base 60. The installation base 60 is, for example, a girder foundation, but is not limited to this. In this embodiment, a girder foundation base 61 configured to fit the bottom surface of the cubicle 10 is formed on the upper surface of the installation base 60. The cubicle 10 is fixed to the girder foundation base 61. The cubicle 10 may also be installed on a mat foundation.

[0030] In each figure, the areas surrounded by dashed double-dashed lines (areas indicated by diagonal lines in Figs. 4 and 6) are the electric wire lead-in sections 3, 4, and 5 (high-voltage line lead-in section 3 and low-voltage line lead-in sections 4, 5). Electric wires such as high-voltage and low-voltage wires are routed from the installation base 60 side to the inside of the cubicle 10 through these sections. In addition to these lead-in sections 3, 4, and 5, other sections into which electric wires are led may be provided. For example, there may be a section into which an electric wire for connection to a ground potential is led.

[0031] As shown in Figure 3, a lower base structure 14 for supporting columns or wall panels is provided at the bottom of the cubicle 10. In this embodiment, the lower base structure 14 is a channel base. The lower base structure 14 functions to transmit the load of the cubicle 10 to the installation base 60 via the girder foundation base 61.

[0032] FIG. 4 is a plan view showing the lower base structure 14 of the cubicle 10. As shown in FIG.

[0033] 4, the lower base structure 14 has a plurality of first base members (an example of first members) 16 and second base members (an example of second members) 20 that structurally connect the first base members 16 to one another. In this embodiment, the lower base structure 14 also has a detachable third base member (an example of third members) 22. The first base members 16, the second base members 20, and the third base members 22 may also be simply referred to as the first members 16, the second members 20, and the third members 22, respectively.

[0034] The first base member 16 is, for example, a beam-shaped (or rod-shaped) member. The first base member 16 is disposed so as to extend substantially horizontally in the front-rear direction.

[0035] The second base member 20 is, for example, a beam-shaped member, but is not limited to this. The second base member 20 is disposed so as to extend substantially horizontally in the left-right direction.

[0036] In this embodiment, the first base member 16 and the second base member 20 are arranged at a substantially perpendicular angle to each other in a horizontal plane. The lower base structure 14 has a frame-like structure in which multiple first base members 16 are arranged substantially parallel to each other and connected by second base members 20. At least one of the second base members 20 is arranged at a position away from both ends of the first base member 16 to which it is connected. That is, among the components constituting the lower base structure 14, at least any two first base members 16 and one second base member 20 connected therebetween are configured to form an H-shape in a plan view. Note that when two second base members 20 are arranged between two first base members 16, these components may be arranged to form a ladder shape in a plan view. In this way, when the second base members 20 are arranged at a position away from both ends of the first base member 16 and no second base member 20 is arranged at the front or rear end, that portion of the frame-like lower base structure 14 is a portion where the outer periphery is interrupted. That is, in this embodiment, the first base member 16 and the second base member 20 are configured to form a frame shape having at least one open side, at least a portion of which is interrupted, in a plan view. The interrupted portion of the outer periphery of the lower base structure 14 may also be referred to as an opening 34 (shown in FIG. 6).

[0037] The lower base structure 14 according to this embodiment has an overall rectangular shape in a plan view. In the lower base structure 14, four first base members 16 are lined up roughly at intervals in the left-right direction. The first base members 16 are discontinuous at three locations between the front ends thereof and at three locations between the rear ends thereof. That is, in a plan view, the sides parallel to the left-right direction are open sides, and three openings 34 are formed on each open side.

[0038] In this embodiment, the first base member 16 is made of, for example, channel steel or H-shaped steel to achieve both ease of construction and load support. The second base member 20 is made of, for example, angle steel. However, these members may be made of other materials.

[0039] In this embodiment, the units that make up the cubicle 10 can be transported independently. The first base member 16 between adjacent units is made up of two members, one channel steel and the other channel steel, arranged adjacent to each other with their webs facing each other and roughly viewed as a single first base member 16. In the description here, the two members arranged adjacently in this way are collectively referred to as a single first base member 16.

[0040] Each unit constituting the cubicle 10 has at least one opening 34. In this embodiment, the cubicle is configured so that there are two openings 34, one on the front side and one on the back side. Each unit also has two first base members 16 and two or more second base members 20 arranged between them. In other words, the units constituting the cubicle 10 have a structure in which the first base members 16 and the second base members 20 are arranged to form a ladder shape.

[0041] The lower base structure 14 of each unit has two second base members 20 arranged spaced apart in the front-to-rear direction, and the area between them has particularly high rigidity and load-bearing capacity, making it an area suitable for installing heavy equipment 36. In other words, the cubicle 10 has a structure in which at least two second base members 20 are arranged separately in the front and rear of the lower base structure 14, and heavy equipment 36 is placed between them.

[0042] When the second base member 20 is not disposed at the front end or rear end of a first base member 16 adjacent to another first base member 16 with a gap therebetween, a detachable third base member 22 is connected to the front end or rear end. That is, the third base member 22 is, for example, a plate-shaped cover member that fills the gap between the first base members 16, which forms the opening 34, but it may also be a rod-shaped or beam-shaped structural member. The third base member 22 can be detached as needed, and finally reattached to restore the closed frame-shaped outer periphery.

[0043] As shown in Figure 3, the main frame 12 includes a lower frame 24 located below and fixed to the lower base structure 14. In addition, the main frame 12 includes pillar members and beam members to which the roof 51, walls, switchboard 53, etc. are attached or which support these.

[0044] FIG. 5 is a plan view showing the main body frame 12 of the cubicle 10. As shown in FIG.

[0045] 5 does not show the roof 51 or the beam members that make up the roof 51, and mainly shows the lower frame 24. The lower frame 24 is a structure installed on the lower base structure 14 and supports the bases of the column members of the main frame 12. The lower frame 24 includes at least two first frame members 26 that extend substantially parallel to the first base member 16, and detachable members 30 that are detachably attached across the ends of each first frame member 26. In this embodiment, the first frame members 26 are arranged in four locations above each first base member 16. The detachable members 30 are provided in areas corresponding to each opening 34, i.e., above the areas that will become each opening 34.

[0046] For example, a floor panel may be attached to the lower frame 24. The floor panel is stretched over the entire area excluding the retractable sections 3, 4, and 5 as described above. For example, a heavy object may be placed on the floor panel. The heavy object may be placed on a subframe (not shown) disposed on the lower frame 24.

[0047] In this embodiment, a door 52 is attached to the end of the first frame member 26, and the detachable member 30 is configured to cover the gap between the door 52 and the lower base structure 14 when the door 52 is in a closed state.

[0048] FIG. 6 is a plan view showing the state in which the opening 34 is formed.

[0049] 6, the lower base structure 14 and the lower frame 24 are shown overlapping each other. As described above, the first frame members 26 are disposed so as to be located above the first base members 16, and the detachable members 30 are provided above the portions that will become the openings 34. Therefore, when the third base member 22 is removed from the lower base structure 14 and the detachable members 30 are removed from the lower frame 24, the openings 34 are formed in those portions in plan view.

[0050] In this embodiment, the lower base structure 14 has an open side on which the detachable third base member 22 is provided, and the lower framework 24 has a detachable member 30 provided at a position corresponding to the location where the third base member 22 is provided. This provides several advantages during the construction and maintenance stages of the cubicle 10. These points will be explained below.

[0051] Fig. 7 is a first diagram illustrating an example of a method for installing the cubicle 10 according to this embodiment. Fig. 8 is a second diagram illustrating the example of the installation method. Fig. 9 is a third diagram illustrating the example of the installation method.

[0052] Each figure shows a schematic example of a construction procedure from the temporary placement of the existing electric wires 62 to the installation of the cubicle 10. In the figures, the girder foundation base 61 is shown by a two-dot chain line. The existing electric wires 62 are also shown by a thick dashed line.

[0053] The electric wire temporary placement step S11 shown in the upper part of Fig. 7 will now be described. On the girder foundation base 61, a worker temporarily pulls out the existing electric wires 62 and places them horizontally. At this time, the existing electric wires 62 are pulled in a direction corresponding to the location where the opening 34 can be provided in the cubicle 10 to be placed. This ensures that there is enough space for the newly installed cubicle 10 to be brought in without interference. Because the existing electric wires 62 can be moved out of the way without having to bend them slightly, the amount of wiring extension and connection work can be minimized.

[0054] The cubicle installation step S12 shown in the lower part of Fig. 7 will now be described. The worker installs the cubicle 10 on the installation base 60 with the third base member 22 and the detachable member 30 removed. At this time, the temporarily placed existing electric wires 62 are positioned in the openings 34 formed between the first base members 16. The existing electric wires 62 can be pulled up inside through the openings 34 when wiring to internal equipment, distribution boards, etc. Therefore, wiring work can be easily performed even after the cubicle 10 has been installed.

[0055] The carrying-in step S13 shown in the upper part of Fig. 8 will now be described. The worker inserts the forks 66 of the forklift 64 carrying the heavy equipment 36 through the opening 34. Here, it is preferable to insert the forks 66 as far as possible without interfering with the second base member 20 or the like. Then, the heavy equipment 36, such as a transformer, is lowered from the forks 66 and moved to a predetermined installation position. It can be directly carried in to a position close to the predetermined installation position through the opening 34. This eliminates the need for large-scale work such as using an overhead crane to lift the heavy equipment 36 high and then lower it, improving work efficiency.

[0056] The post-carry-in process and wiring process S14 shown in the lower part of Fig. 8 will now be described. In the post-carry-in process, the worker fixes the heavy equipment 36 to the first base member 16, etc. Then, the worker pulls out the forks 66 of the forklift 64 between the first base members 16, i.e., through the opening 34. This completes the installation of the heavy equipment 36.

[0057] In addition, in the wiring process, the worker raises the existing electric wires 62 from the temporarily placed state, passes them through the opening 34 of the lower base structure 14, and wires them inside the cubicle 10.

[0058] The covering step S15 shown in Fig. 9 will now be described. After completing the pulling of the existing electric wires 62 and the installation of the heavy equipment 36, the worker reinstalls the third base member 22 and restores the frame structure of the lower base structure 14 to its closed state. At the same time, by attaching the detachable member 30, the opening of the lower assembly frame 24 is closed, ensuring dust resistance and consistency in appearance.

[0059] As described above, the installation process for the cubicle 10 in this embodiment can be performed according to steps S11, S12, S13, S14, and S15 shown in FIGS. 7 to 9. First, a temporary electric wire placement step (S11) is performed in which the existing electric wires 62 are temporarily placed outside the foundation. This is followed by a cubicle installation step (S12) in which the cubicle 10 is installed with the third base member 22 and the detachable member 30 removed. Next, a delivery step is performed in which the heavy equipment 36 is placed on the lower base structure 14 using a forklift 64, and a wiring step (S13, S14) is performed in which the existing electric wires 62 are pulled in and wired through the opening 34. The delivery step and the wiring step may be performed in any order. Finally, a cover step (S15) is performed in which the third base member 22 is restored and the detachable member 30 is attached, restoring the enclosure to a state with the same level of closure as during normal operation. This series of steps allows for efficient separation of the installation of the enclosure and the delivery of the wiring and equipment, thereby shortening the process.

[0060] Conventional cubicle installation posed serious challenges, especially during renovation work. When the old equipment was removed, the electrical wires remained pointing upward, requiring the new enclosure to be installed over the top, a time-consuming and complicated procedure. This constraint forced electrical contractors to manage the process in a way that depended on the construction process, making it difficult to standardize the number of workers, resulting in increased labor costs and longer construction times.

[0061] To address this issue, in this embodiment, an opening 24 is provided in part of the lower base structure 14, and the lower frame 24 installed above it also has a detachable structure. This allows the wiring work to be completed before the cubicle 10 is installed. In other words, electrical contractors can proceed with their work according to their own plans independently of the construction process, making it possible to level out the number of workers required. This makes it possible to reduce labor costs and shorten construction times.

[0062] Furthermore, when transporting heavy equipment such as transformers into a cubicle, the forks of a forklift could not be used in the conventional closed channel base, and it was necessary to suspend the equipment from above using an overhead crane, which made the work more complicated.

[0063] In contrast to this, in this embodiment, the heavy equipment 36 can be easily carried deep into the space by the forklift 64, making work easier.

[0064] (others)

[0065] The present invention is not limited to the above-described embodiment, and various modifications are possible, and these modifications are also included within the scope of the present invention.

[0066] In the above-described embodiment, the sides parallel to the left and right in plan view are open sides, and three openings are formed on each open side, but this is not limited to this. Some open sides may have no openings. Only some of the open sides may be configured to have openings.

[0067] In order to maintain the necessary structural rigidity of the lower base structure even when the third base member is removed, reinforcing members may be appropriately placed on the lower end of the main frame, the second base member, etc. [Industrial Applicability]

[0068] As described above, the cubicle according to the present invention has the effect of enabling cubicle installation and wiring work to be carried out efficiently, and is useful as a cubicle, etc. [Explanation of symbols]

[0069] 3, 4, 5 Retraction section 10 Cubicle 12 Main body frame 14 Lower base structure 16 First base member (an example of the first member) 20 Second base member (an example of the second member) 22 Third base member (an example of the third member) 24 Lower frame 26 First frame member 30 Detachable member 34 Opening 36 Heavy equipment 51 Roof 52 Door 53 Switchboard 61 Geta Foundation Base 60 Installation foundation 62 Existing electric wires 64 Forklift 66 Fork

Claims

1. A cubicle for housing electrical equipment, a main frame including columns and beams; a lower base structure supporting the main body frame; The lower base structure comprises: The device includes at least two first members extending substantially horizontally and substantially parallel to each other, and one or more second members connecting the first members to each other, A cubicle in which the first member and the second member are configured to form a frame shape as a whole in a plan view, having at least one open side that is at least partially interrupted.

2. the lower base structure has a third member connected to ends of at least two of the first members so as to be located at a discontinued portion of the open side; the third member is detachably connected to the first member, The cubicle according to claim 1 , wherein the first member, the second member, and the third member are configured to form a closed frame shape with a closed outer periphery as a whole in a plan view.

3. The cubicle of claim 2, wherein the at least two first members are channel steel or H-shaped steel, and are configured such that an end of each first member is exposed to the outside when the third member is removed.

4. 4. The cubicle according to claim 3, wherein heavy equipment constituting the electrical equipment is arranged above the lower base structure.

5. the main frame includes a lower frame located below and fixed to the lower base structure; The lower framework is at least two first frame members arranged substantially parallel to the first member; 2. The cubicle according to claim 1, further comprising a detachable member detachably disposed at an end of each of the at least two first frame members so as to straddle the at least two first frame members.

6. 2. An installation method for installing the cubicle according to claim 1, comprising: a wire temporary placement process for temporarily placing an existing electric wire that has been pre-installed so that it can be wired from the underside of the cubicle to be installed to the inside of the cubicle, by pulling it out to the outside of the installation position of the cubicle in a plan view; a cubicle installation step of installing the cubicle at an installation position after the electric wire temporary placement step; The installation method includes a wiring process in which, after the cubicle installation process, the existing electric wires are raised from their temporarily placed state, passed through the open side of the lower base structure, and wired inside the cubicle.

7. An installation method for installing the cubicle according to claim 4, comprising: a wire temporary placement process for temporarily placing an existing electric wire that has been pre-installed so that it can be wired from the underside of the cubicle to be installed to the inside of the cubicle, by pulling it out to the outside of the installation position of the cubicle in a plan view; a cubicle installation process of installing the cubicle at an installation position after the electric wire temporary placement process; a carrying-in process of carrying heavy equipment placed on the forks of a forklift into the interior of the cubicle through the open side of the lower base structure after the cubicle installation process; a post-carrying-in step of removing the fork from between the at least two first members after the carrying-in step; a wiring process in which, after the post-carry-in process, the existing electric wires are raised from a temporarily placed state, passed through the open side of the lower base structure, and wired inside the cubicle; and a covering step of attaching the third member to the at least two first members after the wiring step.

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