Foundation cover and building temporary rainproofing method

Abstract

To enable building unit installation work while removing a cover piece from a cover member, while maintaining a state where rainwater is prevented from entering into a foundation, mainly, even in rainfall time.SOLUTION: There is provided a foundation cover 8 covering a foundation 3 of a building 1 from above with a cover member 11. The cover member 11 is divided into a plurality of cover pieces 12 according to the sizes of a plurality of building units 2 arranged side by side on the foundation 3. The cover piece 12 may have connection parts 32 and 33 that are connectable to each other on the side edge part positioned in a boundary part 31 between the building units 2. The cover piece 12 may have a magnet 41, which can attract the building units 2 with magnetic force, on the side edge part.SELECTED DRAWING: Figure 5A

Description

[Technical Field]

[0001] The present invention relates to a foundation cover and a method for providing temporary weatherproofing to a building. [Background technology]

[0002] 2. Description of the Related Art Buildings such as houses are constructed on foundations that are poured and formed in advance on a site.

[0003] Since it takes a certain amount of time from pouring the foundation until the building is constructed, it is necessary to protect the foundation (or provide waterproofing) to prevent rainwater from getting inside during that period.

[0004] The typical waterproofing method for foundations involves placing a foundation cover directly on top of the foundation, simply covering the entire surface of the foundation with the foundation cover from above.

[0005] There are also large-scale structures that involve erecting pillars inside the foundation and using the pillars to stretch the foundation cover in a dome shape, thereby housing the foundation inside the dome-shaped foundation cover (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 11-311028 Summary of the Invention [Problem to be solved by the invention]

[0007] If the entire foundation is directly covered with a foundation cover, removing the entire foundation cover from the foundation at once during rainfall will allow rainwater to get into the foundation, making it impossible to remove the foundation cover during rainfall and carry out work.

[0008] Also, even if the foundation is housed inside a dome-shaped foundation cover, as mentioned above, if the entire foundation cover is removed from above the foundation at once during rainfall, rainwater will get into the foundation, making it impossible to remove the foundation cover and perform work during rainfall.

[0009] Therefore, a main object of the present invention is to contribute to improving the above-mentioned problems. [Means for solving the problem]

[0010] In response to the above problems, the present invention provides: A foundation cover that covers the foundation of a building with a cover member from above, The cover member is divided into a plurality of cover pieces according to the size of the building units to be installed side by side on the foundation, The cover pieces have connecting portions at side edges located at boundaries between the building units, and are connectable to each other; The cover piece is characterized in that it has a magnet on the side edge located at the boundary between the building units, which is magnetically attracted to the building units. [Effects of the Invention]

[0011] According to the present invention, the above-mentioned configuration makes it possible to maintain a state in which rainwater is less likely to enter the foundation even during rainfall, and to perform the installation work of the building unit while removing the cover piece from the cover member. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is an overall perspective view of a unit building constructed on a foundation using a foundation cover according to this embodiment. FIG. [Figure 2] FIG. 2 is an overall perspective view of a building unit that constitutes the unit building of FIG. 1. [Figure 3] FIG. 2 is a perspective view showing the construction procedure of the unit building of FIG. 1. [Figure 4A] FIG. 4 is a perspective view showing the construction procedure of the unit building following FIG. 3. [Figure 4B] FIG. 4B is a plan view of the temporary rainproof sheet (ceiling cover) of FIG. 4A. [Figure 5A] This is an overall perspective view of the foundation with the foundation cover installed. [Figure 5B] FIG. 5B is a partially enlarged view of FIG. 5A. [Figure 6] (a) is a longitudinal cross-section of the foundation seen from the short side, and (b) is a partial longitudinal cross-section of the foundation seen from the long side. [Figure 7] This is a plan view of the cover pieces that make up the foundation cover, where (a) is the cover piece that is installed last, (b) is the cover piece that is installed in the middle, and (c) is the cover piece that is installed first. [Figure 8] 10A is a side view showing the state in which adjacent cover pieces are placed one on top of the other, and FIG. 10B is a partially enlarged view of FIG. [Figure 9] (a) is an overall perspective view of the water fitting, (b) is a side view of the water fitting, and (c) is a front view of the water fitting. [Figure 10] (a) is an overall perspective view of the underwater fitting, (b) is a side view of the underwater fitting, and (c) is a front view of the underwater fitting. [Figure 11] (a) is an overall perspective view of the fixing bracket, (b) is a side view of the fixing bracket, (c) is a front view of the fixing bracket, (d) is a bottom view of the fixing bracket, and (e) is a three-view (front view, side view, bottom view) of the length adjustment plate. [Figure 12] FIG. 10 is a perspective view showing a structure for adjusting the length of the rod-shaped member and the upper presser bar. [Figure 13] FIG. 10 is an overall perspective view of the foundation showing the state in which mounting brackets, rod-shaped members, etc. are attached to the bolt members. [Figure 14] FIG. 10 is an overall perspective view of the foundation with the cover piece in place. [Figure 15] FIG. 10 is an overall perspective view of the foundation showing the state in which the cover pieces are connected to each other. [Figure 16] FIG. 10 is an overall perspective view of the foundation showing the state before the upper pressure bar is inserted into the bar-passing portion. [Figure 17](a) is an overall oblique view of the foundation showing the state after the upper pressure bar has been inserted into the bar-passing section, and (b) is a partially enlarged oblique view showing the state in which the end of the upper pressure bar is fixed using a cap. [Figure 18] This is an overall perspective view of the foundation, showing the state in which the upper pressure rod is inserted into the rod insertion portion (upper surface side insertion portion) and placed on the foundation cover. [Figure 19] Partially enlarged views showing the state of fixing the peripheral edge of the foundation cover, where (a) is the area around the water fitting, (b) is the area around the fixing fitting, and (c) is the area around the covering part of the rising part of the foundation cover. [Figure 20] (a) is an overall perspective view of the foundation showing the state in which the upper pressure bar is being pulled out of the bar-passing section, and (b) is an enlarged partial view of the above-water side of (a) showing the state in which the horizontal member is being pulled out. [Figure 21] 1A and 1B are perspective views of the entire foundation showing the state in which a building unit is installed on the part of the foundation where the cover piece has been turned up, (a) being before installation and (b) being after installation. [Figure 22A] (a) is an overall perspective view of the foundation showing the state where the connecting part of the part where the building unit is installed is being removed, and (b) is an overall perspective view of the foundation showing the state where the vertical diagonal member is being pulled out from the flipped cover piece. [Figure 22B] FIG. 10 is an overall perspective view of the foundation showing the state in which the cover piece is being collected. [Figure 23A] These are partially enlarged side views of building units showing the steps for connecting the upper side cover parts of adjacent temporary waterproofing sheets. (a) shows the state when the preceding building unit is installed, and (b) shows the state when the upper side cover part is folded up and the adjacent building unit is lowered. [Figure 23B] 23A, which are partially enlarged side views of the building unit showing the steps for connecting adjacent upper side cover parts. In this figure, (a) shows the state in which the upper side cover parts are connected to each other, and (b) shows the state in which the upper side cover part is folded in half. [Figure 23C]23B, are partially enlarged side views of the building unit showing the steps for connecting adjacent upper side cover parts. In this figure, (a) shows the state in which the folded upper side cover part is folded over onto the side of the later-installed upper side cover part, and (b) shows the state in which a binding member is attached to the folded upper side cover part. [Figure 23D] This is a partially enlarged side view showing the state in which an upper floor building unit is being installed on top of a lower floor building unit. In this figure, (a) shows the state in which the waterproofing sheet is turned up, and (b) shows the state in which the upper side cover of the adjacent waterproofing sheet is moved toward the upper floor building unit and attached to the lower side of that unit. [Figure 24A] 1A is a diagram showing a modified example of the foundation cover, in which (a) is a plan view showing the layout of the cover pieces relative to the foundation, and (b) is a schematic side view showing the installation state of the cover pieces (for a foundation the size of three building units). [Figure 24B] FIG. 24B is a component diagram (overall plan view) of a narrow cover piece that constitutes the base cover of FIG. 24A. [Figure 24C] FIG. 24B is a parts drawing (overall plan view) of a wide cover piece that constitutes the base cover of FIG. 24A. [Figure 24D] 24B and 24C are enlarged views of the X, Y, and Z portions of the foundation cover, where (a) is a partial enlargement along the width direction of the X portion, (b) is a partial enlargement along the longitudinal direction of the X portion, (c) is a partial enlargement along the width direction of the Y portion, (d) is a partial enlargement along the width direction of the Z portion, and (e) is a partial enlargement along the longitudinal direction of the Z portion. [Figure 24E] 24B is a side view of the side covering part for the short side of the foundation that constitutes the foundation cover of FIG. 24A. Of these, (a) is for the left side above the water, and (b) is for the right side above the water. [Figure 25] 6 according to Example 2. In these figures, (a) is a longitudinal cross-sectional view of the foundation as seen from the short side, (b) is a partial longitudinal cross-sectional view of the foundation as seen from the long side, and (c) is a partial enlarged view of (a). DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, this embodiment will be described in detail with reference to the drawings. 1 to 25 are used to explain this embodiment. [Example]

[0014] <Configuration> The configuration of this embodiment will now be described.

[0015] A building 1 such as a detached house or an apartment building is composed of unit buildings as shown in FIG.

[0016] A unit building is a building 1 that can be constructed in a short period of time by manufacturing box-shaped (rectangular) building units 2 in advance in a factory, transporting them to the construction site, and then assembling and installing them at the construction site as shown in Figures 3 and 4A.

[0017] A unit building is constructed at a construction site by, for example, installing building units 2 of the lower floor L side by side on a foundation 3 (Figure 3), and installing building units 2 of the upper floor H side by side on top of building units 2 of the lower floor L (Figure 4A).

[0018] Each building unit 2 has a unit frame with a box-frame rigid frame structure as its framework. As shown in Figure 2, the unit frame has a structure in which four metal ceiling beams 2b are connected in a rectangular shape between the upper ends of four metal columns 2a, and four metal floor beams 2c are connected in a rectangular shape between the lower ends of the four columns 2a. Exterior wall materials 2d and the like are attached to the outdoor side of the unit frame.

[0019] As shown in FIG. 1, the foundation 3 is a reinforced concrete structure for installing the building 1 at a position higher than the ground. The foundation 3 has at least a peripheral rising portion that extends along the periphery of the building 1. The peripheral rising portion has, for example, a substantially closed frame shape and extends in the circumferential direction of the building 1 with a substantially constant width. The peripheral rising portion rises from the ground at a predetermined height h1 in the vertical direction 4. The peripheral rising portion is formed at a height of approximately 300 to 500 mm, preferably about 400 mm, from the ground.

[0020] The perimeter rising portion is formed in approximately the same shape and size as the external shape of the building 1. In the case of a unit building, the perimeter rising portion has the same shape and size as the external shape of the lower floor L of the building 1 formed by lining up multiple building units 2 of the lower floor L. The foundation 3 can be a continuous footing consisting only of the rising portion including the perimeter rising portion, or a mat footing that seals the ground inside the perimeter rising portion, but either is acceptable.

[0021] In this embodiment, the foundation 3 has a peripheral rising portion that is approximately rectangular in plan view, with a pair of parallel long sides 3a, 3b and a pair of parallel short sides 3c, 3d. A plurality of building units 2, each of which is the same size, are installed side by side on this foundation 3. The building units 2 are installed side by side with their short sides aligned along the long sides 3a, 3b of the foundation 3. Therefore, the long sides 3a, 3b of the foundation 3 have a length that is approximately an integer multiple of the short sides of the building units 2. The short sides 3c, 3d of the foundation 3 have the same length as the long sides of the building units 2.

[0022] If the direction of the shorter side of the approximately rectangular shape is the width direction and the direction of the longer side is the longitudinal direction, with the above arrangement, the width direction of the foundation 3 becomes the longitudinal direction of the building unit 2, and the longitudinal direction of the foundation 3 becomes the width direction of the building unit 2.

[0023] On such a foundation 3, for example, the building units 2 are installed in order from one short side 3c of the foundation 3 to the other short side 3d (installation direction 5 of the building units 2). However, the arrangement of the building units 2 and the shape of the rising part on the perimeter are not limited to those described above.

[0024] The rectangular foundation 3 in plan view has one long side 3a facing above the water and the other long side 3b facing below the water. The short side 3c, which corresponds to the side where the building unit 2 is installed first, is the upstream side in the installation direction 5, and the short side 3d, which corresponds to the side where the building unit 2 is installed later, is the downstream side in the installation direction 5.

[0025] One long side 3a may be the side below the water and the other long side 3b may be the side above the water, but it is preferable to make the side above the water the side where small units and accessories to form a front porch, for example, are installed.

[0026] Hereinafter, when simply referring to the foundation 3, the foundation 3 will mainly refer to the outer peripheral rising part of the foundation 3.

[0027] As shown in Figure 3, a side cover 6 is attached to the opening on the side of the building unit 2 facing the interior of the room to provide temporary waterproofing for the opening, and a ceiling cover (top surface temporary waterproofing sheet or temporary waterproofing sheet 7) is attached to the top surface (ceiling) of the building unit 2 on the lower floor L to provide temporary waterproofing for the top surface. Also, heat insulating material 9 is installed on the inside of the foundation 3 (the rising part of the perimeter).

[0028] The temporary weatherproofing sheet 7 covering the upper surface of the building unit 2 on the lower floor L is, for example, as shown in the component diagram of FIG. 4B.

[0029] That is, the rainproof sheet 7 has four side upper cover portions 7a that protrude from each of the four sides of the rectangular sheet body that covers the top surface of the building unit 2 and cover the upper parts of the four side surfaces of the building unit 2.

[0030] The side upper cover portions 7a are bent downward along the four side surfaces of the building unit 2, and are connected to adjacent side upper cover portions 7a by connecting portions 7b.

[0031] In addition, the back surface of the upper side cover portion 7a is provided with a second connecting portion 7c that can be connected and separated from the adjacent upper side cover portion 7a of another temporary rainproofing sheet 7 installed on the top surface of an adjacent building unit 2 when bent upward.

[0032] The upper side cover portion 7a provided with the second connecting portion 7c has a folding assist line portion 7d extending in the longitudinal direction at the middle of its width to assist in folding the upper side cover portion 7a in half.

[0033] In this case, the temporary rainproofing sheet 7 is formed, for example, from a flexible synthetic resin sheet made of polyethylene or the like (a polyethylene waterproof laminate sheet). The upper side cover portion 7a only needs to be provided on at least the side where the adjacent building unit 2 is located, in order to connect to adjacent temporary rainproofing sheets 7. The connecting portion 7b and the second connecting portion 7c are, for example, hook-and-loop fasteners. The connecting portion 7b and the second connecting portion 7c are provided at least on both end portions of the upper side cover portion 7a. The folding assistance line portion 7d is formed by a seam line, a welding line, or the attachment of a tape-like member, for example.

[0034] In this embodiment, in addition to the basic configuration described above, a foundation cover 8 is attached to the foundation 3 as a temporary rainproofing, as shown in Figure 5A (Figure 5B, Figure 6). The temporary rainproofing is intended to temporarily protect the inside of the foundation 3 from rainwater during the curing of the foundation 3 or after completion, until just before the installation of the building units 2. If there is no risk of rain during the above period, temporary rainproofing is not necessary.

[0035] (About Foundation Cover 8)

[0036] The foundation cover 8 may have the following configuration.

[0037] (A1) A foundation cover 8 that covers the foundation 3 of the building 1 from above with a cover member 11, The cover member 11 is divided into a plurality of cover pieces 12 to match the size of the building units 2 that are installed side by side on the foundation 3. Alternatively, the cover member 11 is made up of a plurality of cover pieces 12 formed to match the size of the building units 2.

[0038] Here, the foundation cover 8 is a flexible sheet-like temporary waterproofing material that covers the entire foundation 3 from above to provide temporary waterproofing for the inside of the foundation 3. The foundation cover 8 is a temporary material that is removed when the building units 2 are installed.

[0039] The foundation cover 8 is mainly composed of a cover member 11. The cover member 11 is composed of a thin, flexible, planar member (sheet or film) that can be folded or rolled up. The entire cover member 11 is formed to a size that can cover at least the entire surface of the foundation 3.

[0040] The cover member 11 is formed of a synthetic resin sheet (polyethylene waterproof laminate sheet) made of, for example, polyethylene. This synthetic resin sheet is waterproof, inexpensive, lightweight, durable, and easy to use, and is therefore used for a variety of purposes, such as construction work sheets at construction sites. This work sheet is made of the same material as multi-purpose sheets that are effectively used for a variety of purposes, such as in outdoor activities, leisure activities, and disaster prevention.

[0041] Dividing according to the size of the building units 2 means that the portion of the cover member 11 that will be inside the foundation 3 is separated at the position between adjacent building units 2, so that it is separated for each building unit 2. This means that the cover pieces 12 have at least a portion that is the same shape and size as the building units 2. Note that, as will be described later, each cover piece 12 is actually slightly larger in shape and size than the building units 2.

[0042] The cover piece 12 is a planar member of a required size that constitutes the cover member 11. By adjusting the size and shape of the cover piece 12 to approximately match the size of the building unit 2, or to match the size and shape of the part of the foundation 3 where the building unit 2 will be installed, the cover piece 12 will be approximately rectangular in plan view. The cover member 11 is easy to handle, as it can be removed from the foundation 3 by simply flipping it over the size of the building unit 2.

[0043] In order to ensure that the cover pieces 12 can be easily flipped over from the foundation 3, the cover pieces 12 are installed on the foundation 3 in a sequential order in the opposite direction to the installation direction 5 of the building unit 2 (installation direction 13 of the cover pieces 12).

[0044] As a result, the upstream and downstream sides are reversed in the installation direction 5 of the building unit 2 and the installation direction 13 of the cover piece 12. In other words, when the installation direction 13 of the cover piece 12 is used as a reference, the side of the other short side 3d of the foundation 3 is the upstream side, and the side of one short side 3c of the foundation 3 is the downstream side. Hereinafter, to avoid confusion, they may be simply referred to as the side of short side 3c and the side of short side 3d.

[0045] The cover pieces 12 are then installed in order, with portions overlapping one another, from the other short side 3d of the foundation 3 toward the other short side 3c of the foundation 3 (FIG. 8). At this time, the other side edge of the subsequent cover piece 12 in the width direction (the short side 3d side) is placed on top of the side edge of one side of the width direction (the short side 3c side) of the previously installed cover piece 12.

[0046] For example, as shown in Figure 7, the cover piece 12 has an inner surface covering portion 14 that mainly covers the inside portion (inner surface) of the foundation 3, and side surface covering portions 16 that are integrally formed on both longitudinal ends of the inner surface covering portion 14. The inner surface covering portion 14 has a surface that is approximately rectangular in plan view and is at least approximately the same size and shape as the bottom surface of the building unit 2, or a larger surface. The side surface covering portion 16 is a surface that covers the side surfaces of the above-water and below-water sides (long sides 3a, 3b) of the foundation 3 from the outside. Note that the boundary between the inner surface covering portion 14 and the side surface covering portion 16 is not necessarily clear, but it appears as a fold when placed on the foundation 3.

[0047] The cover pieces 12 also have overlapping portions 18, 19 that overlap the adjacent side edges of adjacent cover pieces 12. The overlapping portions 18, 19 preferably extend to a length that reaches the installation position of the building unit 2 that the adjacent cover pieces 12 cover, or to a length that exceeds the installation position of the building unit 2. The boundary position of the overlapping portions 18, 19 in the inner surface covering portion 14 is not necessarily clear, but it becomes apparent when the cover pieces 12 are overlapped.

[0048] Furthermore, some of the cover pieces 12 are provided with a side covering portion 17 on one side edge that externally covers the side surfaces of the short sides 3c and 3d of the foundation 3. The boundary between the inner surface covering portion 14 and the side covering portion 17 is not necessarily clear, but when placed on the foundation 3, it appears as a fold.

[0049] Side covering portions 16 that cover the side surfaces of the long sides 3a and 3b of the foundation 3 are provided on all cover pieces 12. In contrast, side covering portions 17 that cover the side surfaces of the short sides 3c and 3d of the foundation 3 are provided only on the cover pieces 12 that are installed first and last.

[0050] Figure 7 shows an example of a foundation cover 8 having the most basic configuration. This foundation cover 8 is made up of three different types of cover pieces 12: a first cover piece 12 (Figure 7(c)) that is installed first, one or more second cover pieces 12 (Figure 7(b)) that are installed in the middle, and a third cover piece 12 (Figure 7(a)) that is installed last. The first cover piece 12 and the third cover piece 12 differ mainly in that they have side covering portions 17 integrally formed on the side edges on different sides, while the second cover piece 12 does not have a side covering portion 17.

[0051] Of these, the side covering portions 16 are provided with a constant width along both longitudinal edge portions (short sides) of each cover piece 12. The side covering portions 17 are provided with a constant width or different widths along one side edge portion (long side) of the first and last cover pieces 12 that are not adjacent to each other.

[0052] The overlapping portions 18, 19 are formed at least in the portions of the side edges (long sides) of each cover piece 12 that overlap with the adjacent cover piece 12. The portions of the side edges (long sides) of each cover piece 12 that do not overlap with the adjacent cover piece 12 are non-overlapping portions. Due to the presence of the overlapping portions 18, 19, the non-overlapping portions are narrower than the bottom surface of the building unit 2.

[0053] Of these, the overlapping portion 18 is the portion that will be above the overlap, and is provided on the side edge of the cover piece 12 on the side of the short side 3d of the foundation 3. The overlapping portion 18 is provided at least within the range of the inner surface covering portion 14, but can be made large enough to extend to the side surface covering portion 16. The overlapping portion 18 is not provided on the cover piece 12 that is installed first.

[0054] The overlapping portion 19 is the portion that underlies the overlap, and is provided on the side edge of the cover piece 12 on the side of the short side 3c of the foundation 3. The overlapping portion 19 is provided at least within the range of the inner surface covering portion 14, but can be made large enough to extend to the side surface covering portion 16. The overlapping portion 19 is not provided on the cover piece 12 that is installed last.

[0055] In addition, as shown in FIG. 5B , the cover piece 12 has one or more mounting holes 22 and auxiliary mounting portions 23 for threading a string-like member 21 such as a band. The auxiliary mounting portion 23 can be, for example, a pocket (string-threading piece) with the mounting hole 22 or a loop-shaped band. The auxiliary mounting portion 23 is mainly provided on the back side (lower surface) of the cover piece 12. The string-like member 21 may be used to directly secure the cover piece 12 to the foundation 3 or the like, or may be used to secure the cover piece 12 to the ground using pegs 24 or the like. The mounting holes 22 are appropriately provided at positions such as the edges of the side covering portions 16 and 17. The auxiliary mounting portions 23 are appropriately provided at positions such as around the edges of the inner covering portion 14. The mounting holes 22 of the cover piece 12 and the pocket may be reinforced with grommets.

[0056] The configuration of the foundation cover 8 is not limited to the above, but may be modified as shown in Figures 24A to 24E, for example, which will be described later.

[0057] (A2) As shown in FIG. 7, the cover piece 12 may have connecting portions 32, 33 that can be connected to each other on the side edges located at the boundary portion 31 (for example, FIG. 3) between the building units 2.

[0058] Here, the boundary 31 is a position that is approximately directly below the space between the adjacent lower sides (adjacent floor beams 2c) of the building units 2 that are installed adjacent to each other on the foundation 3.

[0059] The side edge of the cover piece 12 (where the connecting portions 32, 33 are provided) is the side edge that becomes the overlapping portions 18, 19. The connecting portions 32, 33 are not particularly necessary for the side edge that does not become the overlapping portions 18, 19 and does not have an adjacent cover piece 12.

[0060] If the connecting portions 32, 33 are not provided, the cover pieces 12 are simply installed by arranging them side by side or overlapping them so that no gaps are formed, and this may be done, but it is preferable to provide the connecting portions 32, 33.

[0061] The connecting portions 32 are attached to the overlapping portions 18, 19 along or near the side edges of the cover piece 12. The connecting portions 32 are primarily provided within the range of the inner surface covering portion 14, but may also be provided to extend to the side surface covering portions 16 on both sides.

[0062] The connecting portion 33 is provided mainly between the side covering portions 16 of adjacent cover pieces 12 or between the side covering portion 16 and the side covering portion 17 of the same cover piece 12 .

[0063] The connecting portions 32, 33 may be any type that can connect adjacent cover pieces 12, and may be, for example, a fastener portion, a hook-and-loop fastener, etc. In this embodiment, one connecting portion 32 is a fastener portion, and the other connecting portion 33 is a hook-and-loop fastener.

[0064] The fastener portion is provided on the side edge portion of the cover piece 12 as a connector (connecting member) for connecting at least the inner surface covering portions 14 of the cover pieces 12 together to form an integrated unit.

[0065] The fastener portion mainly comprises a ribbon tape 32a having a large number of interlocking portions called teeth along one side edge portion, and is a combination of two ribbon tapes 32a and an operating slider 32b for engaging and separating the teeth.

[0066] In this embodiment, the slider 32b is attached to one of the ribbon tapes 32a. The ribbon tape 32a to which the slider 32b is attached serves as a male fastener, and the other ribbon tape 32a to which the slider 32b is not attached serves as a female fastener. The slider 32b may have a lead string 32c attached to its handle. The lead string 32c is preferably approximately the same length as or longer than the short sides 3c, 3d of the base 3.

[0067] The hook-and-loop fasteners are provided on each part of the cover piece 12 as connecting devices (connecting members) for connecting and integrating the side covering portions 16 of adjacent cover pieces 12, or the side covering portions 16 and 17 of the same cover piece 12.

[0068] A hook-and-loop fastener is a flexible surface-fixing member for directly attaching surfaces together by hooking force. There are two types of hook-and-loop fasteners: a first ribbon tape 33a (female) with many loop portions on its surface, and a second ribbon tape 33b (male) with many hook portions on its surface. A hook-and-loop fastener serving as a connector is formed by combining the first ribbon tape 33a and the second ribbon tape 33b in a one-to-one relationship.

[0069] The fastener portion and the hook-and-loop fastener are sewn at overlapping positions between the upper surface of the side edge of the cover piece 12 that is installed first and the lower surface of the side edge of the cover piece 12 that is installed last. At this time, the pair of ribbon tapes 32a (male and female) of the fastener portion and one ribbon tape 32a and the other ribbon tape 32a of the hook-and-loop fastener are installed separately on either the upper surface or the lower surface.

[0070] 8, if necessary, the overlapping cover piece 12 may have a zipper cover 35 formed at the overlapping portion 18 to cover the connecting portions 32, 33 from above. Also, the overlapping cover piece 12 may have a backing sheet 36 welded to the back side to cover the attachment portions (seams) of the connecting portions 32, 33 from the back side. This makes it possible to more effectively prevent rainwater from leaking from the connecting portions 32, 33.

[0071] (A3) As shown in FIG. 8, the cover piece 12 may be provided with a magnet 41 on the side edge thereof that can be magnetically attracted to the building unit 2.

[0072] Here, the magnet 41 is a magnetic body (permanent magnet) that is attracted to metal by magnetic force. The magnet 41 is attracted to the lower side (floor beam 2c) of the metal unit frame that constitutes the building unit 2. The magnet 41 is installed on or around the side edge of the cover piece 12 that will be covered by the cover piece 12 that will be installed later.

[0073] In this case, the cover piece 12 extends the overlapping portion 19 formed on the side edge thereof until it reaches the lower edge of the building unit 2 that will be installed at the position of the cover piece 12 that will be installed later. A magnet 41 is attached to the leading edge of this extended overlapping portion 19 or its periphery. The magnet 41 may be sewn or glued to the leading edge of the overlapping portion 19, or the leading edge may be made cylindrical and inserted into it.

[0074] The magnets 41 may be provided at least at both ends of the inner covering portion 14 relative to the side edges of the cover piece 12, but may be provided continuously or discontinuously along the side edges. The magnets 41 may be, for example, granular, block-shaped, or rod-shaped.

[0075] (A4) As shown in Figure 5A (Figure 5B), The cover member 11 may be supported by a rod-shaped member 51 installed on the foundation 3 in an inclined state with one end higher than the other end (FIG. 6). The cover piece 12 may be provided with a rod-passing portion 52 (FIG. 8) through which the rod-shaped member 51 passes.

[0076] Here, the cover member 11 may be installed on the foundation 3 using rod-shaped members 51 so that the inner surface covering portion 14 is in a nearly horizontal position, but it is preferable to install the inner surface covering portion 14 at an incline. The cover member 11 is inclined from one end (above water side) to the other end (below water side) so that the downward slope is at least as large as the drainage gradient.

[0077] When the cover member 11 is inclined, the width of the side covering portions 16, 17 is formed to a size that corresponds to the inclination of the cover member 11 so that the side covering portions 16, 17 can cover almost the entire side of the foundation 3 or at least the upper part.

[0078] That is, the side covering portion 16 of the cover member 11 on one end side, which is higher, is made wider than the side covering portion 16 on the other end side by the amount of lift.

[0079] Specifically, as shown in Figure 6, it is preferable that the width of the underwater side covering part 16 (or the vertical dimension when installed) is approximately the same as or slightly higher than the height h1 of the foundation 3 (height h1 ± α). The width of the underwater side covering part 16 should be at least large enough to cover the periphery of the top (top) of the foundation 3 or the upper side of the foundation 3 (for example, about half of h1 or more), and it is sufficient for it to be at most just in contact with the ground, so it should be set appropriately within that range.

[0080] Therefore, the width of the above-water side covering portion 16 is approximately the width (height h1±α) of the below-water side covering portion 16 plus the height h2 by which the above-water side is raised above the top of the foundation 3. This allows the below-water and above-water side covering portions 16 to smoothly cover the entire side of the foundation 3 or at least the upper periphery thereof.

[0081] In addition, in order to absorb the difference in width of the side covering portion 16 on the below-water side and above-water side and to be able to cover at least the upper part of the side of the short sides 3c and 3d of the foundation 3 without any problems, the side covering portion 17 is made trapezoidal (Figure 7).

[0082] The rod-shaped member 51 is a framework or support rod attached to the foundation 3 so that one end of the cover member 11 is higher than the other end and so that the cover member 11 is maintained in an inclined position where the one end is higher than the other end. There are several types of rod-shaped member 51. The rod-shaped member 51 will be described later.

[0083] The rod-passing portion 52 is a cylindrical portion for passing the rod-shaped member 51 through. The rod-passing portion 52 is attached to and integrated with each of the cover pieces 12 that make up the cover member 11. The rod-passing portion 52 will be described later. At least one rod-passing portion 52 is installed, for example, near the positions of the connecting portion 32 and the magnet 41 on the cover piece 12 so as to avoid these.

[0084] The height h2 of one end of the cover member 11 from the base 3 may be any height greater than the base 3, but is preferably as follows.

[0085] (A5) As shown in FIG. 6, the height h2 of one end of the cover member 11 from the foundation 3 may be set higher than the carry-in height h3 of the underfloor equipment 61 installed within the foundation 3.

[0086] Here, the underfloor equipment 61 refers to equipment installed under the floor, such as an indoor unit of an air conditioner or an underfloor heating device.

[0087] The carry-in height h3 is the dimension in the vertical direction 4 required to pass the underfloor equipment 61. The carry-in height h3 is the vertical dimension of the underfloor equipment 61 plus the required working space. The carry-in height h3 can be set to, for example, 450 mm to 600 mm, preferably about 600 mm.

[0088] Then, on the above-water side (long side 3a) of the foundation 3, a rod-shaped member 51 is installed at an upper position along the long side 3a so as to be higher than the delivery height h3. A cover member 11 is placed on top of this rod-shaped member 51. As a result, one end of the cover member 11 installed on the foundation 3 is raised to the height h2 described above, and a working space for carrying in the underfloor equipment 61 is secured between the top of the foundation 3 and the rod-shaped member 51. The height h2 described above can be set to, for example, 600 mm to 800 mm, and preferably about 700 mm.

[0089] Accordingly, the width (or the vertical dimension when installed) of the side covering portion 16 on one end side (above water side) of the cover member 11 is wider than the width of the side covering portion 16 on the other end side (below water side) by the height h2, which is larger than the dimension of the loading height h3.

[0090] (Installation structure of foundation cover 8)

[0091] The foundation cover 8 may be installed in any manner, for example as follows.

[0092] (B1) As shown in FIG. 5A (FIG. 5B), a foundation cover 8 is provided on the foundation 3 of the building 1 to cover the foundation 3 from above. The foundation cover 8 is held by a bolt member 71 protruding from the foundation 3 via a mounting bracket 72 or a rod-shaped member 51 attached to the mounting bracket 72 .

[0093] Here, the installation structure of the foundation cover 8 is a structure for installing the foundation cover 8 on the foundation 3.

[0094] The bolt members 71 are preferably anchor bolts embedded in the foundation 3 (at its outer peripheral rising portion) so as to protrude upward from the top of the foundation 3 (the upper surface of the outer peripheral rising portion). However, it is also possible to attach dedicated bolt members 71 to the foundation 3 in addition to the anchor bolts. In the case of a unit building, anchor bolts are installed at least at or near the four corners (of the columns 2a) of each building unit 2 when the building units 2 are installed on top of the foundation 3. Anchor bolts are also installed as appropriate in the middle of the short sides 3c, 3d of the foundation 3, etc.

[0095] As shown in Figure 9 (Figure 10), the mounting bracket 72 is a bracket (support rod mounting bracket) that is installed on the bolt member 71 to fix the rod-shaped member 51 to the bolt member 71, and has a bolt mounting portion 73 at least at its lower part that can be attached to the bolt member 71.

[0096] The bolt attachment portion 73 may be, for example, a nut portion 73 a that can be directly screwed onto the bolt member 71 .

[0097] The nut portion 73a may be configured by combining a plurality of types of nut members, such as a hexagonal nut, a high nut, and another hexagonal nut.

[0098] The mounting bracket 72 has, at least at its upper portion, a clamp portion 74 that can fix the rod-shaped member 51. The clamp portion 74 is attached to a clamp support portion 75.

[0099] The clamp portion 74 has a structure in which, for example, one side (upper side) of two semi-cylindrical clamp pieces 74a, 74b are connected by a hinge portion 74c so that they can be opened and closed. The other side (lower side) of the clamp pieces 74a, 74b is fixed to the clamp support portion 75 by fastening members 74d such as bolts and nuts. The nuts of the fastening members 74d are preferably wing nuts (Figure 10(c)) so that they can be operated by hand.

[0100] Mounting bracket 72 has a height setting member 76 interposed between lower bolt mounting portion 73 and upper clamp support portion 75. Height setting member 76 is a member that determines the height of mounting bracket 72. For example, a threaded bolt extending in vertical direction 4 or a rod with threads on both the top and bottom ends can be used as height setting member 76.

[0101] A plurality of types of mounting brackets 72 are used depending on the installation position relative to the foundation 3. The mounting brackets 72 will be described later.

[0102] The rod-shaped member 51 is a long, rod-shaped member that serves as a framework for keeping the foundation cover 8 covering the top of the foundation 3. It is preferable to use, for example, a hollow metal pipe member (support pipe) for the rod-shaped member 51, so that it has an appropriate weight and the necessary strength.

[0103] A plurality of types of rod-shaped members 51 are used depending on the installation position relative to the foundation 3. The rod-shaped members 51 will be described later.

[0104] The foundation cover 8 is indirectly fixed to the foundation 3 by being connected and fixed at least at one point to the mounting bracket 72 or the rod-shaped member 51 attached to the bolt member 71, thereby achieving a strong fixed state using the foundation 3. However, the foundation cover 8 may have a portion that is directly fixed to the bolt member 71.

[0105] (B2) The mounting bracket 72 may include an above-water bracket 81 (Figure 9) installed on the above-water edge of the foundation 3, and an below-water bracket 82 (Figure 10) installed on the below-water edge of the foundation 3. The above-water fitting 81 is higher than the below-water fitting 82 . The rod-shaped member 51 may be provided with a horizontal member 83 arranged along the above-water edge and supported by above-water fittings 81, and a vertical diagonal member 84 arranged approximately perpendicular to the horizontal member 83 and supported at a downward slope by the above-water fittings 81 and below-water fittings 82. Furthermore, an upper pressure bar 85 (FIG. 5A) may be provided, which is disposed parallel to the vertical diagonal members 84 at a position between the vertical diagonal members 84 and placed on the foundation cover 8 from above.

[0106] Here, the above-water side is one of a pair of parallel long sides 3a, 3b of the foundation 3, and in this embodiment it is the long side 3a.

[0107] As shown in Figure 9, the water-surface fitting 81 has two clamp portions 74 (first clamp portion 86, second clamp portion 87) at the top that can respectively fix two rod-shaped members 51 (horizontal member 83 and vertical diagonal member 84).

[0108] The clamp support portion 75 is an L-shaped angle fitting having a horizontal surface 75a and a vertical surface 75b, and the vertical surface 75b faces in the extension direction of the vertical diagonal member 84 (a direction parallel to the short sides 3c, 3d of the foundation 3).

[0109] The clamp portion 74 is attached at different heights relative to the horizontal surface 75a and the vertical surface 75b.

[0110] The clamp portion 74 (first clamp portion 86) of the horizontal member 83 is attached to the lower horizontal surface 75a so as to face in the extension direction of the horizontal member 83 (direction parallel to the long side a of the foundation 3).

[0111] The clamp portion 74 (second clamp portion 87) of the vertical diagonal member 84 is attached to the upper portion of the vertical surface 75b, which is higher than the horizontal surface 75a, so as to face in the extension direction of the vertical diagonal member 84.

[0112] The position of the lower part of the first clamp part 86 (the attachment position relative to the horizontal member 83) is set to be at least approximately the same as or slightly higher than the carry-in height h3 of the underfloor equipment 61. The above-water side part of the foundation cover 8 is placed over the vertical diagonal member 84, which is fixed to the second clamp part 87 and is higher than the first clamp part 86.

[0113] The height setting member 76, which is provided between the lower bolt mounting portion 73 of the above-water fitting 81 and the upper clamp support portion 75 (horizontal surface 75a), is a long pillar-like member that determines the height of the above-water fitting 81. The lower end of the height setting member 76 is threadedly attached to the bolt mounting portion 73 (nut portion 73a), and the upper end is fastened and fixed to the clamp support portion 75 using a hexagonal nut.

[0114] The underwater side is the other of the pair of parallel long sides 3a, 3b of the foundation 3, and in this embodiment, it is the long side 3b.

[0115] As shown in FIG. 10, the underwater fitting 82 has one clamp portion 74 (third clamp portion 88) at the top, which can fix the rod-shaped member 51 (vertical diagonal member 84).

[0116] The clamp support portion 75 is an L-shaped angle metal fitting or the like having a horizontal surface 75a and a vertical surface 75b, and the vertical surface 75b faces in the direction in which the vertical diagonal member 84 extends.

[0117] The clamp part 74 is attached to the upper part of the vertical surface 75b so as to face in the direction in which the vertical diagonal member 84 extends. The underwater part of the foundation cover 8 is placed over the vertical diagonal member 84 fixed to the third clamp part 88 so as to be slightly higher than the foundation 3 from above the vertical diagonal member 84.

[0118] The height setting member 76, which is provided between the lower bolt mounting portion 73 of the underwater fitting 82 and the upper clamp support portion 75 (horizontal surface 75a), is a short pillar-like member that determines the height of the underwater fitting 82. The height setting member 76 of the underwater fitting 82 is shorter than the height setting member 76 of the abovewater fitting 81 (by an amount corresponding to the inclination angle of the vertical diagonal member 84). The clamp support portion 75 of the underwater fitting 82 is supported by the height setting member 76 at a position slightly higher than the top of the foundation 3. The lower end of the height setting member 76 is screwed into the bolt mounting portion 73, and the upper end is fastened and fixed to the clamp support portion 75 using a hex nut.

[0119] Since the height setting member 76 of the underwater fitting 82 may be short, the clamp support portion 75 itself may be shaped to extend downward to provide the function of the height setting member 76. For example, the clamp support portion 75 may have the vertical surface 75b extended by the length of the height setting member 76, and the horizontal surface 75a directly fixed to the bolt member 71. Furthermore, by orienting the two surfaces of the L-shaped angle fitting of the clamp support portion 75 in the vertical direction 4 and arranging them at the required length, the clamp support portion 75 can be made to function both as an attachment for the clamp portion 74 and as a height setting function.

[0120] Furthermore, fixing brackets 91 (FIG. 11) may be installed on the other sides of the foundation 3. The other sides are a pair of parallel short sides 3c, 3d of the foundation 3. The fixing brackets 91 are attached to at least one or all of the bolt members 71 provided on the short sides 3c, 3d of the foundation 3.

[0121] The fixing brackets 91 are pillar-shaped brackets (cover mounting brackets) for fixing the periphery of the side edge of the foundation cover 8 (its inner covering portion 14) to the short sides 3c, 3d of the foundation 3. The fixing brackets 91 are not the mounting brackets 72 for supporting the rod-shaped members 51. However, by providing the fixing brackets 91, the foundation cover 8 can be given tension in the installation direction 13, and the effects of wind force acting on the vertical diagonal members 84 located closest to the short sides 3c, 3d of the foundation 3 can be reduced.

[0122] The fixing bracket 91 is a corner bracket or the like that is approximately triangular in side view and has a horizontal surface 91a, a vertical surface 91b, and a triangular side plate portion 91c. The horizontal surface 91a is strip-shaped and extends in the width direction of the short sides 3c, 3d of the foundation 3. The vertical surface 91b is strip-shaped and its width direction is oriented in the extension direction of the short sides 3c, 3d of the foundation 3. The side plate portion 91c connects the horizontal surface 91a and the vertical surface 91b on one side.

[0123] A horizontal surface 91a located at the bottom of the fixing bracket 91 serves as a bolt mounting portion 73 having a surface (mounting surface) that directly abuts against the top of the foundation 3. A bolt insertion hole 73b is formed in the horizontal surface 91a, and a bolt member 71 can be passed through the bolt insertion hole 73b and fastened to the foundation 3 from above with a nut member.

[0124] A height adjustment plate 92 is attached to the upper part of the vertical surface 91b so as to be slidable in the vertical direction 4. The height adjustment plate 92 is a rectangular plate member that has approximately the same width as the vertical surface 91b and extends in the vertical direction 4, and has a surface that is parallel to the vertical surface 91b. The height adjustment plate 92 is adjusted to a height that corresponds to its installation position so that it is the same height as or slightly lower than the part of the vertical diagonal member 84 that is close to the fixing bracket 91.

[0125] The vertical surface 91b and the height adjustment plate 92 are formed with bolt insertion holes 94a, 94b, respectively, for passing through fastening fixtures 93 such as bolts and nuts, and are fastened in the direction perpendicular to the surface by the fastening fixtures 93.

[0126] At least one of the bolt insertion holes 94a, 94b is an elongated hole extending in the vertical direction 4. In this embodiment, the elongated hole is the bolt insertion hole 94b of the height adjustment plate 92. The height adjustment plate 92 has an attachment hole 92a at its upper portion for attaching the foundation cover 8.

[0127] The foundation cover 8 is fixed to the upper end portion of the fixing bracket 91 (mounting hole portion 92a of the height adjustment plate 92) with a string-like member 21 such as a band using the mounting hole 22 of the mounting auxiliary portion 23 (string-threading piece) (for example, FIG. 19(b)). Therefore, the mounting auxiliary portion 23 and the mounting hole 22 are appropriately provided at least at the upper end portion of each height adjustment plate 92 on the foundation cover 8 and at positions close to each bolt member 71 (positions close to the directions of the long sides 3a and 3b and the short sides 3c and 3d of the foundation 3).

[0128] The horizontal members 83 and the vertical diagonal members 84, which are rod-shaped members 51, are attached to the foundation 3 and are the main framework that supports the foundation cover 8 from below. Note that the "horizontal" in the horizontal members 83 and the "vertical" in the vertical diagonal members 84 refer to the orientation of the long sides 3a, 3b and the short sides 3c, 3d when the top of the foundation 3 is viewed in a plane.

[0129] The horizontal horizontal member 83 is a rod-shaped member 51 that connects and integrates the upper portions of the above-water fittings 81. The horizontal horizontal member 83 is installed between multiple above-water fittings 81 so that its middle portion, other than both ends, does not substantially contact the foundation cover 8. The horizontal horizontal member 83 has approximately the same length as the above-water side (long side 3a) of the foundation 3, and is installed approximately horizontally at a high position (a position higher than the top of the foundation 3 by the delivery height h3 of the underfloor equipment 61) above (directly above or nearby) the above-water side. The horizontal horizontal member 83 is attached so that both ends slightly protrude from the clamp portions 74 of the above-water fittings 81 located on the outermost sides. This allows the foundation cover 8 to be expanded in the direction of the long sides 3a, 3b of the foundation 3.

[0130] The vertical diagonal members 84 are rod-shaped members 51 that directly support the foundation cover 8 from below. The vertical diagonal members 84 have a length approximately equal to that of the pair of short sides 3c, 3d of the foundation 3 (or are longer than the short sides 3c, 3d by the amount of inclination). Single or multiple vertical diagonal members 84 are installed above (directly above or in their vicinity of) the short sides 3c, 3d and at appropriate positions inside the foundation 3, with a downward slope from the above-water side to the below-water side. In the case of a unit building, one vertical diagonal member 84 is installed inside the foundation 3 near the boundary 31 between adjacent building units 2. The vertical diagonal members 84 are attached so that both ends slightly extend beyond the clamp portions 74 (second clamp portion 87, third clamp portion 88) of the above-water fittings 81 and the below-water fittings 82. This allows the foundation cover 8 to be expanded in the direction of the short sides 3c, 3d of the foundation 3.

[0131] The upper pressure rod 85 is a framework (central rib) that is placed on top of the foundation cover 8 to hold down the foundation cover 8 from above. The upper pressure rod 85 is not used as a framework to support the foundation cover 8 from below, and is not directly connected to other frameworks. Therefore, although the upper pressure rod 85 is separated from the rod-shaped member 51 in a narrow sense, it supports the foundation cover 8 as a whole, and therefore can be included in the rod-shaped member 51 as part of the framework in a broad sense.

[0132] The upper pressure rod 85 has approximately the same length as the vertical diagonal members 84, and is installed approximately midway between adjacent vertical diagonal members 84, and approximately parallel to the vertical diagonal members 84. In the case of a unit building, the upper pressure rod 85 is installed near the center of the width of each building unit 2. In this embodiment, the upper pressure rod 85 is installed so that one end is located above the horizontal member 83, and the other end is located above the underwater side of the foundation 3 (long side 3b).

[0133] By installing the upper pressure bar 85, the weight of the upper pressure bar 85 causes the base cover 8 to become depressed at the position of the upper pressure bar 85, forming a downwardly sloping drain groove 89 (Figure 8).

[0134] Furthermore, the other end of the upper pressure bar 85 may be lower than the position of the other end of the vertical diagonal member 84 (at a height of approximately 200 mm), so that it may be in direct contact with the upper surface of the long side 3b, or it may be slightly floating above the long side 3b without being in contact with the ground.

[0135] At this time, the foundation cover 8 takes on a mountain-valley shape with the position of the vertical diagonal member 84 as the peak and the position of the upper pressure rod 85 as the bottom of the valley, and is pulled in the mountain-valley direction (installation direction 13 of the foundation cover 8). Also, by setting the connecting portion 32 between the cover pieces 12 at a relatively high position close to the mountain, between the mountain (vertical diagonal member 84) and the valley (upper pressure rod 85), rainwater is less likely to enter through the connecting portion 32. In this embodiment, the connecting portion 32 is located slightly closer to the short side 3d than the vertical diagonal member 84.

[0136] The horizontal members 83, vertical diagonal members 84, and upper pressure rod 85 can all be made to have the same diameter and thickness, but since the required strength differs, they may be made to have different diameters and thicknesses. In this embodiment, the vertical diagonal members 84, which directly support the foundation cover 8 and therefore require the greatest strength, are made the largest in diameter and thickest in thickness. The upper pressure rod 85, which is simply placed on top of the foundation cover 8 and does not require much strength, is made the smallest in diameter and thinnest in thickness. The horizontal members 83 are made the same in diameter and thickness as the vertical diagonal members 84, or intermediate in diameter and thickness between the vertical diagonal members 84 and the upper pressure rod 85.

[0137] (B3) As shown in FIG. 12, the rod-shaped member 51 may be made adjustable in length.

[0138] Here, "length adjustable" means that the length can be changed. The rod-shaped member 51 may not be length adjustable, but it is preferable that the length be adjustable. To adjust the length, the rod-shaped member 51 may be composed of, for example, a plurality of short metal pipe pieces 51a and metal screw joints 51b.

[0139] In this case, the rod-shaped member 51 can be extended to the required length by connecting multiple short pipe pieces 51a with screw joints 51b. Conversely, by removing the pipe pieces 51a at the screw joints 51b, the rod-shaped member 51 can be disassembled into multiple short pipe pieces 51a. The pipe pieces 51a may all be the same length, or different lengths may be mixed. If the pipe pieces 51a are all the same length, the rod-shaped member 51 will have a length that is an integer multiple of the length of a single pipe piece 51a.

[0140] The pipe piece 51a has male threads 51c on the outer peripheral surface at both ends. The screw joint 51b is a single tubular member having an inner diameter that can fit onto the end of the pipe piece 51a, and has female threads 51d on its inner peripheral surface into which the male threads 51c can be screwed.

[0141] The screw joint 51b may be configured as a separate member from the pipe piece 51a, or may be fixed to one end of the pipe piece 51a and integrated with the pipe piece 51a.

[0142] The rod-shaped member 51 may be configured so that at least one of the horizontal member 83, vertical diagonal member 84, and upper pressure bar 85 is length adjustable, but it is preferable to make all of them length adjustable. Figure 12 shows an example of the vertical diagonal member 84, but the horizontal member 83 and upper pressure bar 85 can also be provided with a similar length adjustment structure (or connecting structure).

[0143] Specifically, in the case of a unit building, it is preferable that the main pipe pieces 51a constituting the horizontal members 83 are formed to have a length that is an integral fraction of the shorter side of the building unit 2.

[0144] In addition, in the case of a unit building, it is preferable that the main pipe pieces 51a constituting the vertical diagonal members 84 and the upper holding rods 85 are formed to a length that is an integral fraction of the long side of the building unit 2.

[0145] The pipe pieces 51a that make up the vertical diagonal members 84 and the upper pressure bar 85 may be of any length, but may also be made the same length as the pipe pieces 51a that make up the horizontal horizontal members 83. However, the lengths of the pipe pieces 51a that make up the horizontal horizontal members 83, vertical diagonal members 84, and upper pressure bar 85 may also be different from one another.

[0146] Furthermore, the length adjustment mechanism for the rod-shaped member 51 is not limited to the above, and various joint structures other than the screw-type joint 51b, an extension structure using a spigot joint, or an extendable structure using nested multiple cylinders may be used. However, in terms of strength, using the screw-type joint 51b is most preferable in terms of ensuring the necessary wind resistance. Structurally, the screw-type joint 51b is also preferable because it is the simplest.

[0147] (B4) The rod-shaped member 51 may be installed by passing it through a rod-passing portion 52 (FIG. 12) provided in the foundation cover 8.

[0148] Here, the rod-passing portion 52 is a cylindrical portion through which the rod-shaped member 51 passes, and at least one rod-passing portion 52 is provided on the foundation cover 8. The rod-passing portion 52 preferably has a diameter slightly larger than that of the rod-shaped member 51 and is a cylindrical body of approximately the same length as or slightly shorter than that of the rod-shaped member 51. The rod-passing portion 52 is preferably formed from approximately the same material as the foundation cover 8. The rod-passing portion 52 is attached to the foundation cover 8 at the installation position of the rod-shaped member 51 so as to extend continuously in the installation direction of the rod-shaped member 51.

[0149] The foundation cover 8 may be a large, single piece that can simultaneously cover the entire foundation 3, but as mentioned above, in the case of a unit building, it is preferable that the foundation cover 8 be divided into cover pieces 12 the size of each unit building. In this case, at least one rod-passing portion 52 is provided for each cover piece 12 (Fig. 7). In this embodiment, each cover piece 12 is provided with a rod-passing portion 52 for passing through and fixing a vertical diagonal member 84 and an upper pressure rod 85.

[0150] Although no rod-passing portion 52 is provided for the horizontal member 83, a rod-passing portion 52 for the horizontal member 83 can be provided as necessary.

[0151] (B5) As shown in FIG. 7 (FIG. 8), the rod-passing portion 52 is a lower surface through-portion 52a provided on the lower surface side of the foundation cover 8; An upper surface through-portion 52b provided on the upper surface side of the foundation cover 8 may also be provided. As shown in FIG. 8, the vertical diagonal member 84 may be installed on the underside of the foundation cover 8 through the underside through-portion 52a. The upper presser bar 85 may be installed on the upper surface side of the foundation cover 8 through the upper surface through-portion 52b.

[0152] Here, the lower surface side through-portion 52a passes the rod-shaped member 51 (vertical diagonal member 84) through the underside of the foundation cover 8, and holds and fixes the rod-shaped member 51 to the foundation cover 8. The lower surface side through-portion 52a is attached to the underside of the foundation cover 8 by sewing, welding, or the like. The lower surface side through-portion 52a is provided at a position on the inner surface covering portion 14 of the cover piece 12, between the second clamp portion 87 of the above-water fitting 81 and the third clamp portion 88 of the below-water fitting 82. The lower surface side through-portion 52a is formed to a length that is approximately the same as or shorter than the distance between the second clamp portion 87 and the third clamp portion 88.

[0153] The upper surface side through-hole 52b is used to pass the rod-shaped member 51 (upper presser bar 85) through the upper side of the foundation cover 8 and to hold and fix the rod-shaped member 51 to the foundation cover 8. The upper surface side through-hole 52b is attached to the upper surface side of the foundation cover 8 by sewing or welding. The upper surface side through-hole 52b is formed on the inner surface covering portion 14 of the cover piece 12 so that it is approximately the same as or shorter than the short sides 3c, 3d of the foundation 3.

[0154] When the foundation cover 8 is divided into cover pieces 12 of a size for each unit building, each cover piece 12 is provided with two rod-passing parts 52 in total so that at least one vertical diagonal member 84 and one upper holding rod 85 can be passed through.

[0155] The two rod-through portions 52 are installed on one side edge of the cover piece 12 (on the short side 3c side of the foundation 3) and on the widthwise center portion (or nearby). The rod-through portion 52 on one side edge is the lower surface side through portion 52a, through which the vertical diagonal member 84 is passed. The rod-through portion 52 on the widthwise center portion is the upper surface side through portion 52b, through which the upper pressure rod 85 is passed. However, for the cover piece 12 that is installed first, a rod-through portion 52 (lower surface side through portion 52a) for the vertical diagonal member 84 near the short side 3d of the foundation 3 is also installed on the other side edge (on the short side 3d side of the foundation 3).

[0156] The installation structure of the foundation cover 8 described above is not limited to the foundation 3 of a unit building, but can also be applied to the foundation 3 of a general building 1.

[0157] <Operation> The operation of this embodiment will now be described.

[0158] Based on the installation structure of the foundation cover 8, the installation method of the foundation cover 8 is as follows.

[0159] (B1) As shown in Figure 5A (Figure 5B), the foundation 3 of the building 1 is covered from above with the foundation cover 8. At this time, the foundation cover 8 is held (to the foundation 3) by bolt members 71 protruding from the foundation 3 via mounting brackets 72 or rod-shaped members 51 attached to the mounting brackets 72.

[0160] (B2) As the mounting brackets 72, above-water brackets 81 (Fig. 9) are installed on the above-water edge of the foundation 3, and below-water brackets 82 (Fig. 10), which are lower than the above-water brackets 81, are installed on the below-water edge of the foundation 3. As the rod-shaped members 51, horizontal members 83 are arranged along the above-water edge and supported by the above-water brackets 81, and vertical diagonal members 84, which are approximately perpendicular to the horizontal members 83, are supported at a downward slope by the above-water brackets 81 and the below-water brackets 82. The mounting brackets 72 and rod-shaped members 51 are used to cover the foundation 3 diagonally from above with the foundation cover 8 so that the above-water side is higher and the below-water side is lower (installed in an inclined position). Then, upper pressure rods 85 (Fig. 5A) parallel to the vertical diagonal members 84 are placed on the foundation cover 8 from above at positions between the vertical diagonal members 84, forming drainage channels 89 in the foundation cover 8.

[0161] (B3) As shown in Fig. 12, a member capable of adjusting the length is used as the rod-shaped member 51. The rod-shaped member 51 can be attached to or detached from the foundation 3, foundation cover 8, etc. while adjusting the length according to the situation.

[0162] (B4) The rod-shaped member 51 is installed by passing it through the rod-passing portion 52 (FIG. 12) provided on the foundation cover 8.

[0163] (B5) At this time, as shown in Figure 7 (Figure 8), the rod-passing portion 52 is made up of a lower-surface-side passing portion 52a provided on the lower surface side of the foundation cover 8 and an upper-surface-side passing portion 52b provided on the upper surface side of the foundation cover 8. As shown in Figure 8, the vertical diagonal member 84 is installed on the lower surface side of the foundation cover 8 through the lower-surface-side passing portion 52a. The upper pressure rod 85 is installed on the upper surface side of the foundation cover 8 through the upper-surface-side passing portion 52b.

[0164] The method for temporarily waterproofing the building 1 using the foundation cover 8 is as follows.

[0165] (A1) The foundation 3 of the building 1 is covered from above with a cover member 11. At this time, the cover member 11 is divided to provide multiple cover pieces 12 that match the size of the building unit 2. Alternatively, the cover member 11 is made up of multiple cover pieces 12 that are formed to match the size of the building unit 2. Then, multiple cover pieces 12 are installed side by side on the foundation 3 according to the arrangement (installation position) of the building unit 2 (relative to the foundation 3).

[0166] (A2) As shown in Figure 7, the cover pieces 12 (placed side by side on the foundation 3) are connected to each other by connecting portions 32, 33 provided on the side edges located at the boundary portions 31 (e.g., Figure 3) between the building units 2. This makes the cover pieces 12 into an integrated cover member 11.

[0167] (A3) As shown in Figure 8, the cover piece 12 is designed to be magnetically attracted to the building unit 2 by magnets 41 provided on the side edges. This eliminates gaps between the side edges of the cover piece 12 and the building unit 2, preventing rainwater from seeping in through the gaps.

[0168] (A4) When installing the cover piece 12 on the foundation 3, as shown in Fig. 5A (Fig. 5B), the cover member 11 is supported by a rod-shaped member 51 installed on the foundation 3 in an inclined state with one end higher than the other end (Fig. 6). Then, the rod-shaped member 51 is passed through a rod-passing portion 52 (Fig. 8) provided on the cover piece 12. Alternatively, the rod-shaped member 51 is held by the cover piece 12 by passing it through the rod-passing portion 52. (A5) At this time, as shown in FIG. 6, the height h2 of one end of the cover member 11 from the foundation 3 is set higher than the carry-in height h3 of the underfloor equipment 61 installed in the foundation 3.

[0169] (A6) In the above, when the building units 2 are installed in order on the foundation 3, the cover members 11 are arranged so that the building units 2 to be installed are floating above the foundation 3, and the cover pieces 12 located below the floating building units 2 are removed (by flipping them over, etc.). This prevents rainwater from entering the foundation 3 from the areas where the cover pieces 12 have been removed.

[0170] (A7) After installing the building unit 2 at the position where the cover piece 12 was removed, a magnet 41 is provided on the side edge of another cover piece 12 adjacent to the removed cover piece 12, and the side edge is magnetically attracted to the installed building unit 2.

[0171] (A8) The cover pieces 12 have overlapping portions 18, 19 on their side edges. Then, the cover pieces 12 are installed on the foundation 3 with their side edges overlapping (with the overlapping portion 18 overlapping the overlapping portion 19) in order from the latest side to the earliest side in the installation order of the building units 2. Conversely, the cover pieces 12 are removed from the foundation 3 in order from the earliest side to the latest side in the installation order of the building units 2.

[0172] (A9) When installing a building unit 2 on the foundation 3, the top surface of the building unit 2 is (previously) covered with a temporary rainproof sheet 7, and when another building unit 2 is installed next to the building unit 2, the temporary rainproof sheets 7 on the top surfaces of the adjacent building units 2 are connected to each other.

[0173] (A10) When installing the building unit 2 of the upper floor H on top of the building unit 2, the building unit 2 of the upper floor H is floated above the building unit 2, and the temporary rainproof sheet 7 located underneath the floating building unit 2 of the upper floor H is removed (by flipping it over, etc.).

[0174] (A11) The temporary rainproofing sheet 7 is formed with an upper side cover portion 7a that covers the upper part of the side of the building unit 2. The upper side cover portions 7a of adjacent temporary rainproofing sheets 7 are bent upward, and the upper side cover portions 7a are connected to each other, and the connected upper side cover portions 7a are bent in half while still connected.

[0175] (A12) As described above, horizontal horizontal members 83 extending along the above-water side (long side 3a) of the foundation 3 of the unit building (building 1) are attached via above-water fittings 81 to bolt members 71 protruding from at least the above-water side (long side 3a). The foundation 3, with the horizontal horizontal members 83 installed so that they are higher than the above-water side (long side 3a), is then diagonally covered from above with a foundation cover 8. The peripheral edges of the foundation cover 8 are fixed to the ground with string-like members 21 and pegs 24, and are also fixed to the bolt members 71 protruding from the foundation 3 or to fixing fittings 91 attached to the bolt members 71. In this state, the method for removing the foundation cover 8 involves removing the string-like members 21, pegs 24, fixing fittings 91, and the portion of the horizontal horizontal member 83 where the first building unit 2 will be installed just before installing the first building unit 2 on the foundation 3.

[0176] Below, more specific details of how to use the foundation cover 8 will be explained, including how to install and remove it.

[0177] (How to install the foundation cover 8)

[0178] The foundation cover 8 is installed on the foundation 3 so as to cover the entire foundation 3. The work flow for this will be explained below.

[0179] First, as shown in FIG. 13, a mounting bracket 72 or the like is attached to a bolt member 71 of the foundation 3 (mounting bracket or the like installation step).

[0180] At this time, above-water fittings 81 are attached to the above-water side (long side 3a) of the foundation 3, and below-water fittings 82 are attached to the below-water side (long side 3b). Fixing fittings 91 are also attached to the other sides (short sides 3c, 3d). Fixing fittings 91 are adjusted to be approximately the same height as the parts near the vertical diagonal members 84. The adjustment may be made at the time of attachment, or after the vertical diagonal members 84 have been installed.

[0181] In the case of a unit building, bolt members 71 (anchor bolts) are installed at least at or near the four corners of the building unit 2 at the position where each building unit 2 is installed on the foundation 3. Therefore, at the boundary 31 between adjacent building units 2, two bolt members 71 for adjacent building units 2 are installed side by side in positions relatively close to the long sides 3a, 3b of the foundation 3. In this case, the mounting fittings 72 (underwater fitting 82 and abovewater fitting 81) are attached to one of the two bolt members 71.

[0182] In this embodiment, of the four bolt members 71 provided at the installation position of each building unit 2 relative to the foundation 3, mounting brackets 72 are attached to the two bolt members 71 located on the side of the building unit 2 that is earlier in the installation order (in this embodiment, on the side of the short side 3c). Basically, mounting brackets 72 are not attached to the remaining two bolt members 71. Therefore, of the two bolt members 71 installed side by side at the boundary 31, the one located on the short side 3d is used to attach the mounting bracket 72.

[0183] For the building unit 2 that is to be installed last, the mounting brackets 72 are attached to all of the bolt members 71 at the four corners.

[0184] The mounting bracket 72 is configured to mount a pair of an above-water bracket 81 and an under-water bracket 82.

[0185] Then, the rod-shaped member 51 is installed above the foundation 3 using the mounting bracket 72 attached to the bolt member 71 (first support rod installation step).

[0186] First, horizontal members 83 are installed approximately horizontally between the upper ends of the above-water fittings 81, and all of the above-water fittings 81 are connected by the horizontal members 83. The horizontal members 83 may be installed after being connected in advance to make them longer, or they may be installed while being connected to make them longer. The horizontal members 83 are installed at a relatively high position above the above-water edge of the foundation 3.

[0187] Then, after the horizontal member 83 is installed above the foundation 3, as shown in Figure 14, the foundation cover 8 is placed on top of the horizontal member 83 and placed on top of the foundation 3. This allows the shape of the foundation cover 8 to be maintained by both ends of the horizontal member 83 so that the above-water side can expand in the extension direction of the long side 3a of the foundation 3 and cover the short sides 3c and 3d of the foundation 3.

[0188] In this case, the foundation cover 8 is installed so that the inner surface covering portion 14 covers one side of the foundation 3 and the side surface covering portion 16 covers the long sides 3a and 3b of the foundation 3. The first and last cover pieces 12 are installed so that the side surface covering portions 17 cover the short sides 3c and 3d of the foundation 3.

[0189] The foundation cover 8 may be installed by connecting multiple cover pieces 12 in advance to make it larger, or as shown in Figure 15, cover pieces 12 corresponding to the position of each building unit 2 may be installed individually and then the cover pieces 12 may be connected together later with connecting parts 32, 33 to make it larger.

[0190] When connecting each cover piece 12 later, the cover pieces 12 are installed in order from the latest side of the building unit 2 (in this embodiment, the side of the short side 3d of the foundation 3) to the earliest side in the installation order. The cover pieces 12 are installed one by one in order so that a part of the side edge (overlapping portion 18) of the adjacent cover piece 12 overlaps the side edge (overlapping portion 19) of the previously installed cover piece 12 (see Figure 8).

[0191] Each time a cover piece 12 is installed, the vertical diagonal member 84 is passed through the rod-passing portion 52 (lower surface side passing portion 52a) to integrate the vertical diagonal member 84 and the cover piece 12, and the vertical diagonal member 84 maintains the shape of one side edge in a straight, stretched state. The vertical diagonal member 84 has both ends fixed to the above-water fittings 81 and the below-water fittings 82, supporting the vertical diagonal member 84 at a downward slope. As a result, the above-water and below-water sides of the portion of the cover piece 12 that covers the inside of the foundation 3 (inner surface covering portion 14) are expanded by both ends of the vertical diagonal member 84 in the extension directions of the short sides 3c and 3d, respectively.

[0192] As a result of the above, the cover piece 12 spreads out in a state of being inclined downward from the above-water side to the below-water side, and a base shape that makes it difficult for rainwater to accumulate on the cover piece 12 is created (second support rod installation process).

[0193] The cover piece 12 may be installed on the foundation 3 after first passing the vertical diagonal member 84 through the rod-passing portion 52 (lower surface side passing portion 52a). This allows the cover piece 12 to be turned over so that the lower surface faces up, and then the vertical diagonal member 84 can be passed through the upper rod-passing portion 52, improving the workability of the rod-passing operation.

[0194] The vertical diagonal member 84 may be connected and lengthened in advance and then passed through the rod-passing portion 52 (lower surface side passing portion 52a) to fix both ends to the above-water fitting 81 and the below-water fitting 82, or it may be connected and lengthened and then passed through the rod-passing portion 52 to fix both ends to the above-water fitting 81 and the below-water fitting 82.

[0195] Then, after all of the cover pieces 12 installed on the foundation 3 have been secured by passing the vertical diagonal members 84 through them, as described above, adjacent cover pieces 12 are joined together at the overlapping portions of their side edges with the connecting parts 32, 33. This makes it difficult for rainwater to leak between the side edges of adjacent cover pieces 12.

[0196] If the connecting part 32 is a zipper, the zipper is fastened to one side of the cover piece 12 (for example, the underwater side), and the lead string 32c is pulled from the other side (for example, the abovewater side). This allows the cover piece 12 (the inner surface covering part 14 thereof) to be connected with the zipper without entering the foundation 3. It is preferable to return the tip of the lead string 32c to one side (for example, the underwater side) after connection.

[0197] Furthermore, when the connecting portion 33 is a hook-and-loop fastener, the hook-and-loop fastener can be joined by simply overlapping the side edges of adjacent cover pieces 12 (side surface covering portions 16 thereof) and pressing them together from above. Note that the connecting portion 33 (hook-and-loop fastener) between the same cover pieces 12 (side surface covering portions 16 and 17 thereof) is also connected at an appropriate timing in the same manner.

[0198] 16 and 17, once the cover pieces 12 are connected to form one foundation cover 8, an upper pressure rod 85 is installed on top of the foundation cover 8 (third support rod installation process). In this embodiment, the upper pressure rod 85 is inserted from the above-water side toward the below-water side, but it can be inserted from either side.

[0199] The upper pressure bar 85 may be connected in advance to lengthen it before being passed through the bar-passing portion 52 (upper surface-side passing portion 52b), or it may be connected in advance to lengthen it before being passed through the bar-passing portion 52 (upper surface-side passing portion 52b). In this way, the upper pressure bar 85 and the cover piece 12 are integrated.

[0200] The upper holding rod 85 has its above-water end positioned above the horizontal member 83, and its below-water end positioned above the top surface of the foundation 3 (long side 3b).

[0201] In this way, by installing the upper pressure bar 85 on top of the cover piece 12, the cover piece 12 is depressed downward due to its weight, and changes from the state shown in Figure 17 to a state with a steeper downward slope than the vertical diagonal member 84, as shown in Figure 18.

[0202] At this time, the cover piece 12 is pressed down from above by the weight of the upper pressure rod 85, causing it to be recessed downward around the position of the upper pressure rod 85, increasing the overall tension. In particular, the underwater side of the cover piece 12 is held at the upper end of the underwater fitting 82 by the vertical diagonal member 84, and is lowered by the upper pressure rod 85 to a position above the foundation 3 or slightly above it, making it lower than the underwater fitting 82, resulting in a relatively large peak-valve shape.

[0203] As a result, a drain groove 89 is formed in the cover piece 12 between the vertical diagonal members 84, with a downward slope along the upper pressure bar 85. This drain groove 89 gradually becomes larger and deeper from the above-water side to the below-water side.

[0204] Then, as shown in Figure 19, while checking and adjusting the tension of the foundation cover 8, each part of the peripheral edge of the foundation cover 8 (position of the mounting holes 22) is fastened to the rod-shaped member 51, the mounting bracket 72, the fixing bracket 91, the bolt member 71 of the foundation 3, etc. with a string-like member 21 such as a band.

[0205] When fixing the rod-shaped member 51 or the upper pressure bar 85 to the foundation cover 8, it is also possible to directly wrap and fasten a string-shaped member 21 such as a band around the rod-shaped member 51 or the upper pressure bar 85. Alternatively, as shown in Figure 17(b), a cap 95 having a through hole 95a may be attached to the end of the rod-shaped member 51, and the string-shaped member 21 such as a band may be passed through the mounting hole 22 of the foundation cover 8 using the through hole provided in the cap 95 to fasten the rod-shaped member 51 or the upper pressure bar 85.

[0206] Furthermore, to prevent the peripheral portion of the foundation cover 8 from flapping in the wind, the peripheral portion may be additionally fixed to the ground using string-like members 21 such as bands and pegs 24. The pegs 24 should be driven into positions as close to the foundation 3 as possible.

[0207] Finally, it is preferable to perform a water resistance test by pouring water onto the base cover 8.

[0208] This completes the installation of the foundation cover 8 on the foundation 3. The foundation cover 8 is then firmly fixed to the bolt members 71 of the foundation 3 via the mounting brackets 72 or the rod-shaped members 51, thereby reliably preventing the foundation cover 8 from being blown away by the wind.

[0209] (How to remove the base cover 8)

[0210] Next, a method for installing the building unit 2 on the foundation 3 and a method for removing the foundation cover 8 at the time of rainfall will be described.

[0211] Normally, the building units 2 are not installed on the foundations 3 when it is raining, but in this embodiment, the building units 2 can be installed even when it is raining.

[0212] Before installing the building unit 2, it is confirmed that rainwater has not accumulated on the foundation cover 8. If rainwater has accumulated on the foundation cover 8, the accumulated rainwater is forcibly drained, for example, using a pump or the like (rainwater removal process).

[0213] First, the string-like members 21 such as bands and pegs 24 that fasten the foundation cover 8 to the ground, the bolt members 71, the fixing brackets 91, the mounting brackets 72, the rod-like members 51, etc. are removed from each part of the periphery of the foundation cover 8, thereby releasing the periphery of the foundation cover 8 from its fastened state (periphery releasing process). If it is not raining, the entire foundation cover 8 can be removed in one go. This work is carried out immediately before the first building unit 2 is installed on the foundation 2. "Immediately before installing the first building unit 2" preferably refers to the period from around the time the first building unit 2 arrives at the construction site on the day of installation until the first building unit 2 is hoisted onto the foundation 2.

[0214] The building units 2 are then installed one by one in order in the installation direction 5 from the short side 3c to the short side 3d on the foundation 3. At this time, as shown in Figure 20, only the upper holding rod 85 and rod-shaped members 51 (part of the horizontal member 83 and the vertical diagonal member 84) installed in the position on the foundation 3 where the building unit 2 will be installed are removed from the foundation 3. In addition, the mounting brackets 72 (underwater brackets 82, abovewater brackets 81) installed in that part are also removed from the foundation 3. If fixing brackets 91 are present in that part, they are also removed (process of partially removing rod-shaped members, etc.). The rod-shaped members 51 and mounting brackets 72 are left in place in the other parts of the foundation 3.

[0215] At this time, the upper pressure bar 85 is pulled out completely from the rod-passing portion 52. The upper pressure bar 85 may be removed by pulling it out entirely from the rod-passing portion 52 (upper surface side passing portion 52b) in one go. Alternatively, the upper pressure bar 85 may be removed by removing the screw joint 51b while pulling it out of the rod-passing portion 52 and disassembling it into short pipe pieces 51a. It is not necessary to disassemble the upper pressure bar 85 into individual pipe pieces 51a; it is most efficient to disassemble it into pieces long enough that they do not protrude from the site, and this also takes a short amount of time (the same applies to the other rod-shaped members 51).

[0216] As for the vertical diagonal member 84, if it is removed from the mounting bracket 72 (underwater bracket 82, abovewater bracket 81), it will come off from the foundation 3, so it can be left as it is in the rod-through portion 52 (underside through portion 52a).

[0217] The horizontal horizontal member 83 may be removed in any manner as long as only the portion where the building unit 2 is to be installed can be removed. For example, the horizontal horizontal member 83 may be disassembled at a single screw joint 51b between the portion to be removed and the remaining portion, and the portion to be removed may be pulled out from the side of the building unit 2 that was installed earlier (in this embodiment, the side of short side 3c). Conversely, for example, the horizontal horizontal member 83 may be pulled out from the side of the building unit 2 that was installed later (in this embodiment, the side of short side 3d) by the length of one short side 3c, 3d of the building unit 2. On the side of short side 3d, the portion of the horizontal horizontal member 83 pulled out from the mounting bracket 72 (water-surface bracket 81) is disassembled into the pipe piece 51a and removed. In this case, the clamps 74 of all water-surface brackets 81 are loosened so that the horizontal horizontal member 83 can slide within the clamps 74. Alternatively, it is also possible to disassemble the part to be removed at one screw joint 51b between the part to be removed and the part to be left in place, then disassemble the part to be removed at one screw joint 51b located in the middle of the part to be removed to divide it into two, and then pull each part out inward. For parts where the building units 2 have not yet been installed, the horizontal members 83 are left as they are on the foundations 3.

[0218] Then, the mounting metal fittings 72 and the fixing metal fittings 91 from which the rod-shaped member 51 has been removed are removed from the bolt member 71 and collected, as described above.

[0219] Once this state has been achieved, the building unit 2 is lifted up with a crane and temporarily held in a floating state directly above the installation position of the foundation 3, as shown in Figure 21(a) (partial removal process of rod-shaped members, etc.). The building unit 2 should be floated at a height that is neither too high nor too low, and is suitable for the work of removing the cover pieces 12.

[0220] In this state, only the cover piece 12 under the floating building unit 2 of the foundation cover 8 is flipped up toward the short side 3d of the foundation 3 and temporarily placed so that it overlaps the adjacent cover piece 12 (cover piece removal process). Then, as shown in Figure 21(b), the building unit 2 is installed on top of the part of the foundation 3 that was covered by the flipped cover piece 12 (or the part from which the cover piece 12 has been removed) (building unit installation process).

[0221] At this time, the magnets 41 attached to the side edge (or overlapping portion 19) of the adjacent cover piece 12 on the building unit 2 side are attached to the bottom (floor beam 2c) of the installed building unit 2, quickly sealing the gap between the bottom of the side of the building unit 2 and the side edge of the adjacent cover piece 12 (side edge adsorption process). The magnets 41 are attached at a position higher than the vertical diagonal members 84.

[0222] Once the building unit 2 has been installed in this way, preparations are made to install the next building unit 2. During this time, as shown in Figure 22A(a), the connecting parts 32, 33 between the turned-over cover piece 12 and the adjacent cover piece 12 are released, and the turned-over cover piece 12 is separated from the adjacent cover piece 12 (cover piece separation process). The adjacent cover piece 12 is left as it is on the foundation 3.

[0223] If the connecting portion 32 is a zipper, the zipper can be released and the flipped-up cover piece 12 can be separated by pulling the lead string 32c from one side of the cover piece 12 (for example, the underwater side) without entering the foundation 3.

[0224] Furthermore, if the connecting portion 33 is a hook-and-loop fastener, the side edges (of the side covering portion 16) of the cover piece 12 are pulled apart. Note that the hook-and-loop fastener of the side covering portion 16 may be peeled off when the cover piece 12 is turned over.

[0225] If the vertical diagonal member 84 remains in the rod-passing portion 52 of the cover piece 12 that has been turned over, as shown in Figure 22A (b), the vertical diagonal member 84 is pulled out from the rod-passing portion 52 of the cover piece 12 after the cover piece 12 has been turned over or after the cover piece 12 has been separated. In this embodiment, the vertical diagonal member 84 is pulled out toward the underwater side, but it may be pulled out toward either side. The method of pulling out the vertical diagonal member 84 is the same as for the upper pressure rod 85 described above. The reason for leaving the vertical diagonal member 84 on the cover piece 12 until the cover piece 12 is turned over is that the cover piece 12 can be turned over quickly and neatly by holding and operating the vertical diagonal member 84.

[0226] After the cover piece 12 is separated and the vertical diagonal member 84 is removed, it is folded over the remaining foundation cover 8 as shown in FIG. 22B, and then rolled up and collected (cover piece collecting step).

[0227] Thereafter, the above steps are repeated in order until the installation of all the building units 2 on the lower floors L is completed.

[0228] As a result, even during rainfall, the building unit 2 on the lower floor L can be installed without getting the inside of the foundation 3 wet, and the foundation cover 8 can be removed from the foundation 3 in an orderly manner.

[0229] The connection and removal of the temporary rainproof sheet 7 will be described below.

[0230] (About connecting temporary rainproof sheet 7)

[0231] Next, when installing the building units 2 of the lower floor L adjacent to each other on the foundation 3, the adjacent upper side cover portions 7a (Figure 23A(a)) of the temporary rainproofing sheet 7 (previously) attached to the top surface of the building unit 2 of the lower floor L are folded upward (Figure 23A(b)), and the back surfaces of the upper side cover portions 7a are aligned and connected with the second connecting portion 7c (upper side cover portion connecting process, Figure 23B(a)).

[0232] The connected side upper cover parts 7a are folded in half at the folding assist line 7d, with the upper edge of the side upper cover parts 7a facing downward and hidden inside the folded side upper cover parts 7a (folding step, Fig. 23B(b)). This prevents rainwater from entering between the side upper cover parts 7a from the (top) edge of the side upper cover parts 7a.

[0233] Then, the folded upper side cover part 7a is laid down almost horizontally toward the adjacent temporary weatherproofing sheet 7 (Fig. 23C(a)). The laid upper side cover part 7a is fixed to scaffolding or the like using a binding member such as a band, as necessary (Fig. 23C(b)).

[0234] Thereafter, the above process is repeated until all of the building units 2 on the lower floor L are installed on the foundations 3. As a result, all of the temporary waterproofing sheets 7 are connected and integrated, and the top surfaces of the building units 2 on the lower floor L are temporarily waterproofed.

[0235] (Regarding removal of temporary rainproof sheet 7)

[0236] Next, the building units 2 of the upper floor H are placed on top of the building units 2 of the lower floor L, starting from the edge (Figure 4A). At this time, the building units 2 of the upper floor H are temporarily held in a floating state above the building units 2 of the lower floor L, and the building units 2 of the upper floor H cover the building units 2 of the lower floor L.

[0237] Then, the temporary waterproofing sheet 7 located under the floating building unit 2 of the upper floor H is turned up and removed by temporarily placing it on top of the adjacent temporary waterproofing sheet 7, and the building unit 2 of the upper floor H is installed in the turned-up area (Figure 23D(a)). The turned-up temporary waterproofing sheet 7 is then separated from the adjacent temporary waterproofing sheet 7, folded, collected, and reused. The adjacent temporary waterproofing sheet 7 is left on top of the building unit 2 of the lower floor L in almost its original state, and its upper side cover portion 7a is folded in half in the opposite direction from the above and laid down toward the installed building unit 2 of the upper floor H, and attached to the building unit 2 of the upper floor H (Figure 23D(a)). The attached upper side cover portion 7a can be fixed to scaffolding or the like using a binding material such as a band, if necessary. This eliminates the gap between the building unit 2 of the upper floor H and the upper side cover portion 7a of the adjacent temporary waterproofing sheet 7, preventing rainwater from seeping in.

[0238] Thereafter, the above process is repeated until all of the building units 2 for the upper floor H are installed on top of the building units 2 for the lower floor L. This allows all of the temporary waterproofing sheets 7 to be efficiently removed, and the building units 2 for the upper floor H can be installed on top of the building units 2 for the lower floor L while preventing rainwater from entering.

[0239] <Effects> According to this embodiment, the following effects can be obtained.

[0240] The effects of the foundation cover 8 will be described below.

[0241] (Effect A1) In the foundation cover 8, the cover member 11 may be provided in a state in which it is divided into cover pieces 12 having portions of approximately the same size and shape as the building units 2. A plurality of these cover pieces 12 are installed side by side on the foundation 3 in accordance with the arrangement and orientation of the building units 2. Then, when the building units 2 are installed on the foundation 3 using a crane, only the cover pieces 12 installed on the portions of the foundation 3 where the building units 2 will be installed are flipped up to expose that portion of the foundation 3.

[0242] This work is carried out by floating the building unit 2 above the part of the foundation 3 where it will be installed, and protecting that part from rainwater. In addition, the other cover pieces 12 are left covering the other parts of the foundation 3 (parts where installation will not be performed).

[0243] Then, the cover pieces 12 are flipped over to install the building units 2 on the exposed portions of the foundation 3. The flipped cover pieces 12 are removed, folded, and collected. Thereafter, the building units 2 are installed in the same manner, flipping over the cover pieces 12 one by one in order.

[0244] In this way, even during rainfall, the building unit 2 can be installed while maintaining a state in which rainwater does not enter the foundation 3 from other locations.

[0245] Furthermore, when the building unit 2 reaches the location where it is to be installed, the cover piece 12 below it is flipped up while the building unit 2 is floating above the foundation 3. This makes it difficult for rainwater to enter the foundation 3 from the part where the cover piece 12 is flipped up. Therefore, the cover piece 12 can be removed while effectively preventing rainwater from entering as a whole.

[0246] Furthermore, by dividing the cover member 11 into a plurality of cover pieces 12, each cover piece 12 can be handled individually, which makes handling much easier than when the cover member 11 is made up of a single large-sized member.

[0247] (Effect A2) In the foundation cover 8, the side edges of the cover pieces 12 located at the boundaries 31 between the building units 2 may be provided with connecting portions 32, 33. This allows the cover pieces 12 to be arranged side by side with no gaps in between them in accordance with the arrangement of the building units 2 on the foundation 3, and allows adjacent cover pieces 12 to be easily connected and integrated by the connecting portions 32, 33. Conversely, the cover pieces 12 can be easily separated (from an integrated state) by removing the connecting portions 32, 33. By connecting the cover pieces 12 to each other with the connecting portions 32, 33, the cover pieces 12 can more effectively suppress and prevent rainwater from seeping in through the gaps.

[0248] In this case, for example, the connecting portions 32, 33 are used as fasteners, and a lead string is tied to the slider 32b of the fasteners and guided to the opposite side of the slider 32b. This allows the fasteners to be fastened to one side of the cover piece 12 and the lead string 32c to be pulled from the opposite side, thereby easily joining the fasteners (connecting the cover pieces 12) without having to enter the foundation 3. After connection, by guiding the lead string to the opposite side (one side) of the slider 32b of the cover piece 12, the fasteners can be easily removed (the cover pieces 12 can be separated) without having to enter the foundation 3 by pulling the lead string 32c from one side.

[0249] Furthermore, for example, by using hook-and-loop fasteners for the connecting portions 32, 33, the hook-and-loop fasteners can be easily joined without entering the foundation 3 by simply overlapping and pressing the side edges of the cover pieces 12 together, and conversely, the hook-and-loop fasteners can also be easily removed.

[0250] (Effect A3) In the foundation cover 8, the cover member 11 may be provided with magnets 41 on its side edges. After the building unit 2 is installed on the foundation 3, the magnets 41 provided on the side edges of the cover member 11 are used to attract and fix the side edges of the cover member 11 to the bottom of the building unit 2 immediately after installation. The magnets 41 are used on the side edges of the cover pieces 12 adjacent to the installed building unit 2, of the cover members 11 remaining on the foundation 3, that are close to the building unit 2. This makes it possible to quickly seal the gap between the installed building unit 2 and the cover member 11 immediately after installation of the building unit 2, preventing rainwater from entering through the gap.

[0251] (Effect A4) In the foundation cover 8, the cover member 11 may be supported by the rod-shaped members 51 in an inclined state with one end higher than the other end relative to the foundation 3. This allows rainwater to drain naturally from above the inclined cover member 11 to the outside of the foundation 3. This prevents rainwater from accumulating on the cover member 11.

[0252] The cover member 11 can be supported in an inclined state, for example, by simply placing it over the top of a rod-shaped member 51 (horizontal horizontal member 83) installed above one side of the foundation 3 (for example, the long side 3a).

[0253] By providing the cover member 11 with the rod-passing portion 52, the cover member 11 can be integrated with the rod-shaped member 51 simply by passing the rod-shaped member 51 (vertical diagonal member 84 or upper pressure rod 85) through the rod-passing portion 52. The cover member 11 is maintained in a straight, stretched state by the rod-shaped member 51. Therefore, the cover member 11 can be stably maintained in an inclined state by the rod-shaped member 51.

[0254] By integrating the rod-shaped member 51 (vertical diagonal member 84) through the rod-through portion 52 of the cover member 11, the wind pressure acting on the cover member 11 can be transmitted to the rod-shaped member 51, and further transmitted from the rod-shaped member 51 to the foundation 3 via the fixing bracket 91 and anchor bolt.

[0255] (Effect A5) In the foundation cover 8, the cover member 11 may be installed so that the height h2 of one end from the foundation 3 is higher than the delivery height h3 of the underfloor equipment 61. This makes it possible to deliver the underfloor equipment 61 into the foundation 3 at any time, even after the cover member 11 has been installed on the foundation 3, before the building unit 2 is installed.

[0256] In addition, by utilizing the space below one end of the raised cover member 11, it is possible to install insulation material 9 (foundation insulation material) on the inside of the foundation 3 or to perform pre-piping, even if the cover member 11 is present.

[0257] (Effect A6) In the above, when the building units 2 are installed in order on the foundation 3, the cover member 11 is removed by removing the cover piece 12 located below the floating building unit 2 while the building unit 2 to be installed is floating above the foundation 3. In this way, by removing the cover member 11 from below the floating building unit 2, the lower part of the foundation 3 can be prevented from getting wet with rainwater.

[0258] (Effect A7) After installing a building unit 2 in the area where a cover piece 12 has been removed, the magnet 41 provided on the side edge of another cover piece 12 adjacent to the removed cover piece 12 magnetically attracts the side edge to the installed building unit 2. This quickly seals the gap between the building unit 2 and the side edge of the other cover piece 12, preventing rainwater from entering.

[0259] (Effect A8) Overlapping portions 18, 19 that overlap each other are provided on the side edges of the cover pieces 12, and the cover pieces 12 are installed on the foundation 3 with the side edges overlapping each other (with overlapping portion 18 overlapping overlapping portion 19) in order from the latest side to the earliest side in the installation order of the building units 2, and the cover pieces 12 are removed in order from the earliest side to the latest side in the installation order of the building units 2. This allows the cover pieces 12 to be installed on the foundation 3 efficiently, and also removed efficiently.

[0260] (Effect A9) When installing a building unit 2 on the foundation 3, the top surface of the building unit 2 is covered with a temporary rainproofing sheet 7, and when another building unit 2 is installed next to the building unit 2, the temporary rainproofing sheets 7 on the top surfaces of the adjacent building units 2 are connected together. This makes it possible to temporarily waterproof the top surfaces of the building units 2 with the temporary rainproofing sheet 7. By connecting the temporary rainproofing sheets 7 together, the temporary rainproofing sheets 7 are integrated, making it possible to prevent rainwater from seeping in between the temporary rainproofing sheets 7.

[0261] (Effect A10) When installing the building unit 2 of the upper floor H on top of the building unit 2, the building unit 2 of the upper floor H is floated above the building unit 2, and the temporary rainproof sheet 7 located under the floating building unit 2 of the upper floor H is removed. In this way, by removing the temporary rainproof sheet 7 from under the floating building unit 2 of the upper floor H, it is possible to prevent the top surface of the lower building unit 2 from getting wet with rainwater.

[0262] (Effect A11) The temporary rainproofing sheet 7 is formed with an upper side cover portion 7a that covers the upper part of the side of the building unit 2. Then, adjacent temporary rainproofing sheets 7 are connected to each other with the upper side cover portions 7a bent upward, and the connected upper side cover portions 7a are folded in half while still connected. By folding the connected upper side cover portions 7a bent upward in half in this way, the ends of the upper side cover portions 7a are hidden inside, making it possible to prevent rainwater from seeping in between the temporary rainproofing sheets 7 without using any special sealing materials or sealing structures.

[0263] (Effect A12) The foundation cover 8 can be removed by removing the string-like members 21, pegs 24, fasteners 91, and horizontal members 83 from the periphery of the foundation cover 8, which are used to install the first building unit 2. This releases the periphery of the foundation cover 8, preparing it for removal from the foundation 3. By performing this preparatory work immediately before installing the first building unit 2 on the foundation 3, the preparatory work and the actual removal of the foundation cover 8 are performed in a single operation, eliminating waste. The time from the preparatory work to the start of the removal work is also shortened, improving the work schedule. Furthermore, improved work schedules reduce the amount of rainwater that seeps into the foundation 3 through the gaps between the foundation cover 8 and the building units 2. Furthermore, improved work schedules allow work to proceed smoothly, even in adverse working conditions such as rainy weather, reducing the occurrence of errors.

[0264] The effects of the installation structure of the foundation cover 8 will be described below.

[0265] (Effect B1) In the installation structure of the foundation cover 8, the foundation cover 8 may be held by bolt members 71 protruding from the foundation 3 via mounting brackets 72 or rod-shaped members 51. This allows the bolt members 71 attached to the foundation 3 to be used to firmly hold the foundation cover 8 to the foundation 3. This reliably prevents the foundation cover 8 from being blown away by the wind, improving the wind resistance of the foundation cover 8 installed on the foundation 3. Furthermore, by making effective use of the bolt members 71 attached to the foundation 3, the installation structure of the foundation cover 8 can be simplified, eliminating the need for a large-scale structure such as a separate installation structure from the foundation 3, for example.

[0266] (Effect B2) In the installation structure of the foundation cover 8, the mounting brackets 72 may include an above-water bracket 81 installed on the above-water edge of the foundation 3, and an under-water bracket 82 installed on the below-water edge of the foundation 3. The above-water bracket 81 may be higher than the below-water bracket 82. The rod-shaped member 51 may include a horizontal member 83 arranged along the above-water edge and supported approximately horizontally by the above-water bracket 81, and a vertical diagonal member 84 arranged perpendicular to the horizontal member 83 and supported at a downward slope toward the below-water side by the above-water bracket 81 and the below-water bracket 82.

[0267] This allows the horizontal member 83 to be installed at a high position along the above-water edge using the above-water fittings 81. In addition, the above-water fittings 81 and the below-water fittings 82 allow the vertical diagonal member 84 to be installed perpendicular to the horizontal member 83, at a downward slope.

[0268] Then, the foundation cover 8 is installed on top of the foundation 3 so as to cover the foundation 3. As a result, the abovewater side of the foundation cover 8 is raised by the abovewater ends of the abovewater fittings 81, horizontal members 83, and vertical diagonal members 84, and the belowwater side is lowered by the belowwater ends of the belowwater fittings 82 and vertical diagonal members 84. The vertical diagonal members 84 allow the foundation cover 8 to be stretched in a state where its shape is maintained at a downward slope from abovewater to belowwater.

[0269] The installation structure of the foundation cover 8 may also include an upper pressure rod 85 that is arranged parallel to the vertical diagonal members 84 at a position between the vertical diagonal members 84 and placed on the foundation cover 8 from above.

[0270] Then, the upper pressure bar 85 is placed on top of the foundation cover 8 at a position between the vertical diagonal members 84. This causes the weight of the portion of the foundation cover 8 on which the upper pressure bar 85 is placed to sink, making the tension of the foundation cover 8 stronger and forming a drain groove 89 on top of the foundation cover 8. The upper pressure bar 85 and vertical diagonal members 84 give the underwater edge of the foundation cover 8 a mountain-valley shape with the vertical diagonal members 84 positioned higher and the upper pressure bar 85 positioned lower, so the drain groove 89 is clearly formed.

[0271] (Effect B3) In the installation structure of the foundation cover 8, the rod-shaped member 51 may be made adjustable in length. This makes the rod-shaped member 51 easier to handle, and makes it possible to easily maneuver the rod-shaped member 51 regardless of the conditions of the site.

[0272] (Effect of screw joint 51b)

[0273] Specifically, at least one of the rod-shaped members 51 may be configured to be able to connect and separate multiple pipe pieces 51a via screw joints 51b. This allows the lengths of the rod-shaped members 51, such as the horizontal members 83, vertical diagonal members 84, and upper pressure bar 85, to be adjusted in units of the length of the pipe pieces 51a. Furthermore, by configuring the pipe pieces 51a to be connected and separated using screw joints 51b, the rod-shaped members 51 can ensure high wind resistance.

[0274] Among the horizontal members 83, vertical diagonal members 84, and upper pressure rod 85, the rod-shaped members 51 that can be connected and separated using screw joints 51b are made up of multiple pipe pieces 51a. Therefore, by separating the pipe pieces 51a, the rod-shaped members 51 can be easily handled during transportation, installation, removal, etc., and can be easily handled regardless of the site conditions.

[0275] That is, the lengths of the horizontal members 83, vertical diagonal members 84, and upper pressure rod 85 can be adjusted by connecting the pipe pieces 51a with screw joints 51b. Therefore, the rod-shaped members 51 can be used for foundations 3 of various sizes.

[0276] The horizontal members 83, vertical diagonal members 84, and upper pressure rods 85 are easy to work with and convenient because when installing the building units 2 on the foundation 3, the pipe pieces 51a can be removed at the screw joints 51b for each building unit 2 to shorten or remove them.

[0277] (Effect B4) In the installation structure of the foundation cover 8, the rod-shaped member 51 may be installed by passing it through the rod-passing portion 52 provided in the foundation cover 8. In this way, by passing the rod-shaped member 51 through the rod-passing portion 52, the foundation cover 8 is put in a taut state and its shape is maintained.

[0278] The foundation cover 8 and the rod-shaped member 51 are integrated by passing the rod-shaped member 51 through the rod-passing portion 52. Therefore, the wind pressure received by the foundation cover 8 can be reliably transmitted to the rod-shaped member 51 via the rod-passing portion 52.

[0279] Furthermore, by fixing the rod-shaped members 51 to the foundation 3 via the mounting brackets 72 and the bolt members 71, the foundation cover 8 is indirectly attached to the foundation 3. Therefore, the force transmitted to the rod-shaped members 51 is transmitted to the foundation 3 via the mounting brackets 72 and the bolt members 71.

[0280] (Effect B5) In the installation structure of the foundation cover 8, the rod-passing portion 52 may include a lower-side passing portion 52a provided on the lower side of the foundation cover 8 and an upper-side passing portion 52b provided on the upper side of the foundation cover 8. The vertical diagonal member 84 may be installed on the lower side of the foundation cover 8 through the lower-side passing portion 52a, and the upper pressure rod 85 may be installed on the upper side of the foundation cover 8 through the upper-side passing portion 52b.

[0281] In this way, by passing the vertical diagonal members 84 through the lower surface side through-holes 52a and the upper pressure rods 85 through the upper surface side through-holes 52b, it is possible to easily and reliably set each rod-shaped member 51 in the correct position relative to the foundation cover 8. Then, by simply passing the rod-shaped members 51 through the designated rod-passing portions 52, the rod-shaped members 51 and the foundation cover 8 can be reliably assembled onto the foundation 3 in a short amount of time with little effort.

[0282] The vertical diagonal member 84 supports the foundation cover 8 from below, and the upper pressing rod 85 presses the foundation cover 8 from above.

[0283] <Modification>

[0284] The following describes modified examples of the foundation cover 8. Figures 24A to 24E show modified examples of the foundation cover 8.

[0285] The modified foundation cover 8 shown in Figure 24A is used when multiple building units 2 of the same size and shape are installed on a foundation 3. Figure 24A(a) shows a case where four building units 2 are installed, and Figure 24A(b) shows a case where three building units 2 are installed.

[0286] In this modification, the foundation cover 8 has cover pieces 12 that are symmetrical in the width direction. Two types of cover pieces 12 having such a symmetrical structure are prepared: a cover piece 12 with a narrow width N (FIG. 24B) and a cover piece 12 with a wide width W (FIG. 24C).

[0287] In addition, the side covering portion 17 is configured such that all or a part (lower part) thereof is separate from the cover piece 12 and is detachable from the cover piece 12.

[0288] Of these, only one cover piece 12 with a narrow width N shown in Fig. 24B is used initially, and the cover piece 12 with a wide width W shown in Fig. 24C is used for the second and subsequent pieces (until the end).

[0289] The cover piece 12 with narrow width N in Fig. 24B is placed at the bottom, so it has a narrower width than the others. The cover piece 12 with wide width W in Fig. 24C is placed on top of the other, so it has a wider width than the cover piece 12 with narrow width N in Fig. 24B by the amount of overlap. Note that the overlapping portions 18, 19 of both cover pieces 12 are formed to the same width, and the width is adjusted by the width of the non-overlapping portion in the center of the width.

[0290] 24E(a)(b) are designed to cover either the short side 3c or 3d of the foundation 3, and have opposite shapes and structures. Therefore, regardless of which of the long sides 3a or 3b of the foundation 3 is on the above-water side, these two pieces can be used appropriately.

[0291] In order to make the cover piece 12 symmetrical in the width direction, the cover piece 12 has the following configuration.

[0292] That is, the cover piece 12 has an upper surface through-hole 52b at the center of its width. The cover piece 12 has overlapping portions 18 and 19 formed on both side edges that have the same shape (width and length) and the same configuration (connecting portions 32 and 33, lower surface through-hole 52a, magnet 41, etc.) on both sides.

[0293] The cover piece 12 is also provided with one underside through-portion 52a at the center of the width of each of the overlapping portions 18 and 19. Furthermore, mounting holes 22 and auxiliary mounting portions 23 having mounting holes 22 are symmetrically arranged at each portion of the overlapping portions 18 and 19, such as the peripheral portions thereof.

[0294] As a result, the cover piece 12 has a symmetrical structure in the width direction.

[0295] In this case, overlapping portions 18 and 19 each have a male fastener that extends along the entire side edge as connecting portion 32. Additionally, overlapping portions 18 and 19 each have a female fastener that extends the entire side edge (parallel to the male fastener) at a position more inward than the edge (at the boundary with the non-overlapping portion) as another connecting portion 32. In other words, overlapping portions 18 and 19 each have two types of connecting portion 32.

[0296] The first connecting portion 32 and the second connecting portion 32 are disposed parallel to each other at equal intervals, and at the middle in the width direction of the first connecting portion 32 and the second connecting portion 32, one lower surface through-portion 52a is provided parallel to the first connecting portion 32 and the second connecting portion 32. The lower surface through-portion 52a has a length that extends to the extent of the inner surface covering portion 14 so as not to reach the end edges of the cover piece 12.

[0297] At the same positions on the extension lines of both ends of the underside passing portion 52a, one ribbon tape 33a and the other ribbon tape 33b of the hook-and-loop fastener serving as the connecting portion 33 are attached separately to the front and back sides, respectively. The one ribbon tape 33a and the other ribbon tape 33b are formed in the portion that becomes the side covering portion 16 so as to reach both end edges of the cover piece 12. Cutouts are formed in the sides of the connecting portion 33 (hook-and-loop fastener) along the ribbon tapes 33a and 33b.

[0298] In addition, two plate-shaped magnets 41 are attached to each of the overlapping portions 18 and 19 of the cover piece 12 at the edges near the male fastener, at positions that are to become both ends of the inner covering portion 14.

[0299] As a result, the overlapping portions 18 and 19 have a structure that is symmetrical in the width direction in every detail.

[0300] In addition, the side covering portion 17 in Figure 24E is trapezoidal in shape, and at both ends of its longitudinal direction, it has integrally formed folded-in portions 17a in the shape of a right-angled isosceles triangle with equal sides the same as the width dimension of the side covering portion 16.

[0301] The folding portion 17a is folded in half at the center of the base along the perpendicular bisector so that the equal sides overlap each other. A first ribbon tape 33a and a second ribbon tape 33b that constitute the connecting portion 33 are attached to the surfaces of the equal sides along the equal sides, respectively. As a result, the folding portion 17a is folded in half and the first ribbon tape 33a and the second ribbon tape 33b are connected to form a three-dimensional shape that fits the corners of the base 3.

[0302] The side covering portion 17 has a length up to the folded portions 17a at both ends that is the same length as the side edge portions of the cover piece 12, and the upper edge portion is provided with a ribbon tape 32a that serves as the female side of the connecting portion 32 and extends over the entire length.

[0303] The other configurations are almost the same as those in FIG.

[0304] Then, each cover piece 12 and the side covering portion 17 are placed on the foundation 3 in the same manner as in the above embodiment, as shown in FIG. 24A(b).

[0305] The cover piece 12 is installed so that the wider side of the side covering portion 16 faces above the water. The side covering portion 17 is installed so that the larger folded-in portion 17a faces above the water.

[0306] In this case, the cover piece 12 that is first installed on the foundation 3 is the cover piece 12 with narrow width N shown in Figure 24B. The upper edge (female fastener) of one side covering portion 17 shown in Figure 24E is connected to the side edge (male fastener) of this cover piece 12 with narrow width N that is on the short side 3d side of the foundation 3.

[0307] Thereafter, one or more cover pieces 12 having a wide width W as shown in FIG. 24C are installed on the base 3 in a line in the installation direction 13 .

[0308] That is, the side edge portion (overlapping portion 19) of the narrow width N cover piece 12 in Fig. 24B that faces the short side 3c of the base 3 is overlapped with the side edge portion (overlapping portion 18) of the wide width W cover piece 12 in Fig. 24C that faces the short side 3d of the base 3. Then, the male fastener of the overlapping portion 18 of the wide width W cover piece 12 is connected to the female fastener of the overlapping portion 19 of the narrow width N cover piece 12.

[0309] 24C is overlapped with the side edge (overlapping portion 19) of the wide-width W cover piece 12 in FIG. 24C that faces the short side 3c of the foundation 3. Then, the male fastener of the overlapping portion 18 of the wide-width W cover piece 12 is connected to the female fastener of the overlapping portion 19 of the narrow-width N cover piece 12. This process is repeated the number of times necessary to cover the entire foundation 3.

[0310] 24C is installed, the upper edge (female fastener) of the other side surface covering portion 17 in FIG. 24E is connected to the side edge (male fastener) of the last wide-width W cover piece 12 on the short side 3c side of the base 3. Other installation methods are the same as those in the above embodiment.

[0311] As a result of the above, the foundation cover 8 is installed on the foundation 3 without any problems.

[0312] According to this modified foundation cover 8, by making the cover pieces 12 and the side covering parts 17 symmetrical, it is possible to use only the above-mentioned four types of components regardless of which of the long sides 3a, 3b of the foundation 3 is on the abovewater side, thereby increasing the versatility of the cover pieces 12. In other respects, it can have the same configuration as the above-mentioned embodiment, and can achieve the same functions and effects. [Example]

[0313] Figure 25 is used to explain this embodiment. Below, we will explain the differences from the above embodiment. Other than that, this embodiment is almost the same as the above embodiment, so the description of the above embodiment can be used to describe this embodiment.

[0314] <Configuration> The configuration of this embodiment will now be described. In this embodiment, the cover member 11 has a recess 101 in the base 3 that slopes downward from one end to the other end. The recess 101 may have, at its lowest part, a drain nozzle 103 that is inserted into a foundation-penetrating sleeve 102 provided in the foundation 3 .

[0315] Here, the recess 101 is a depression formed by pressing the portion of the cover member 11 that will be inside the base 3 from above, causing it to recess downward so that it is lower than the upper part of the base 3. When the cover member 11 is divided into a plurality of cover pieces 12, the recess 101 is formed in each of the cover pieces 12.

[0316] The cover member 11 may be recessed using any object, but for example, as in the above embodiment, it may be recessed by placing a rod-shaped member 51 such as an upper pressure rod 85 (not shown in FIG. 24) from above and using the weight of the upper pressure rod 85. The upper pressure rod 85 used is short so that the other end does not reach the top of the underwater side (long side 3b) of the foundation 3.

[0317] The upper pressure bar 85 is then installed so that one end is positioned above the above-water side (long side 3a) of the foundation 3 and the other end is positioned on the near side of the below-water side (long side 3b) of the foundation 3, above the inside bottom surface of the foundation 3. In this case, the upper pressure bar 85 may be straight, or may be curved to match the ideal shape of the recess 101.

[0318] As a result, with the other end edge and side covering portion 16 of the cover member 11 covering the underwater side (long side 3b) of the foundation 3, the inner portion of the foundation 3 is recessed downward from one end to the other end (so as to be lower than the upper part of the foundation 3). The recess 101 has a drainage function similar to that of the drain groove 89 of the above embodiment.

[0319] The foundation-penetrating sleeve 102 is a pipe member that is buried on the other end side of the foundation 3 and that communicates between the inside and outside of the foundation 3. In this embodiment, the foundation-penetrating sleeve 102 is buried at or below the middle in the vertical direction 4 on the underwater side (long side 3b) of the foundation 3, so that it is nearly horizontal or slopes slightly downward toward the outdoors. In this embodiment, the foundation-penetrating sleeve 102 is buried at the lowest position of the rising part on the outer periphery of the foundation 3.

[0320] After the foundation penetration sleeve 102 has been weatherproofed, it may be used to pass, for example, piping such as water supply pipes and drainage pipes, and wiring such as electric wires and signal cables. By running wiring and piping through the foundation penetration sleeve 102 buried in the foundation 3 in this way, it becomes possible to perform maintenance on the wiring and piping that has penetrated the foundation 3 without destroying the foundation 3. The foundation penetration sleeve 102 is kept closed when no wiring or piping is being used.

[0321] The drain nozzle 103 at the bottom of the recess 101 being inserted into the foundation-penetrating sleeve 102 means that the recess 101 slopes downward toward the foundation-penetrating sleeve 102. Also, the recess 101 is recessed into a shape such that the end point (bottom) of the downward slope of the recess 101 matches the foundation-penetrating sleeve 102. Then, the drain nozzle 103 provided at the bottom of the recess 101 enters the foundation-penetrating sleeve 102.

[0322] The drain nozzle 103 is a drain outlet forming member attached to a through hole that penetrates between the front and back of the cover member 11. The drain nozzle 103 is attached to the cover member 11 in advance, or is prepared so that it can be attached on-site. The drain nozzle 103 only needs to be inserted at least into the foundation-penetrating sleeve 102, but it is preferable that the length of the drain nozzle 103 extends beyond the foundation-penetrating sleeve 102 to the outdoor side. The drain nozzle 103 may be equipped with a strainer at the inlet to prevent clogging.

[0323] As for the above-water side of the cover member 11, as in the above-water fittings 81, horizontal members 83 and vertical diagonal members 84 may be attached, so that the above-water side portion is raised higher than the top surface of the foundation 3, as in the above-water embodiment.

[0324] Furthermore, since the abovewater side of the cover member 11 only needs to be higher than the foundation-penetrating sleeve 102, it may be made approximately the same height as the top of the foundation 3, for example, without providing the horizontal member 83. In this case, vertical members 104 may be provided instead of the vertical diagonal members 84. The vertical members 104 are rod-shaped members 51 that extend from the abovewater side to the belowwater side approximately horizontally or at a gentle downward slope, at a height approximately the same as or slightly higher than the top of the foundation 3.

[0325] This vertical member 104 may be attached to bolt members 71 provided on the above-water and below-water long sides 3a, 3b of the foundation 3 using low mounting brackets 72 similar to the underwater brackets 82. In this way, the above-water brackets 81 and horizontal members 83 are no longer necessary, and the cover pieces 12 are arranged nearly horizontally, allowing the side covering portions 16 at both end edges to have approximately the same width.

[0326] The rest of the configuration can be almost the same as in the above embodiment.

[0327] <Operation> The operation of this embodiment is as follows.

[0328] In this embodiment, a recess 101 that slopes downward from one end to the other end is formed in the foundation 3 for the cover member 11. A drain nozzle 103 is attached to the bottom of the recess 101 and inserted into a foundation penetration sleeve 102 provided in the foundation 3. This provides temporary waterproofing for the foundation 3 of the building 1.

[0329] <Effects> According to this embodiment, the following effects can be obtained.

[0330] In the foundation cover 8, the cover member 11 may have a recess 101 that slopes downward from one end to the other end inside the foundation 3. The recess 101 may have a drain nozzle 103 at its bottom that is inserted into a foundation-penetrating sleeve 102 provided in the foundation 3.

[0331] As a result, rainwater that falls on the cover member 11 is collected in the recess 101 and can be naturally drained from the drain nozzle 103 at the bottom of the recess 101 through the foundation-penetrating sleeve 102 to the outside of the foundation 3. This prevents rainwater from accumulating on the cover member 11. [Explanation of symbols]

[0332] 1. Building 2 Building Units 3 Basics 3a Long side (side above water) 3b Long side (underwater side) 3c Short side 3d short side 5 Installation direction 7. Temporary rainproof sheet 7a Upper side cover 7b Connection part 7c Second connection part 7d Bending auxiliary line part 8 Base cover 11 Cover member 12 Cover piece 13 Installation direction 18 Overlapping Section 19 Overlapping Section 31 Boundary 32 Connecting part 33 Connecting part 41 Magnet 51 Rod-shaped member 52 Rod threading section 61 Underfloor equipment 101 recess 102 Foundation penetration sleeve h1 Height (base) h2 Height (above the water of the foundation cover) h3 Loading height H Upper floor L Lower floor

Claims

1. A foundation cover that covers the foundation of a building with a cover member from above, The cover member is divided into a plurality of cover pieces according to the sizes of the building units to be installed side by side on the foundation, The cover pieces have connecting portions at side edges located at boundaries between the building units, and are connectable to each other; A foundation cover characterized in that the cover piece has a magnet on the side edge located at the boundary between the building units, which can be magnetically attracted to the building units.

2. A temporary rainproofing method for a building in which the foundation of the building is covered with a cover member from above, A method for temporarily waterproofing a building, comprising: dividing the cover member to provide a plurality of cover pieces that match the size of the building units; installing a plurality of the cover pieces in a line on the foundation according to the arrangement of the building units; and, when installing the building units in order on the foundation, removing the cover member from the cover piece located below the floating building unit while floating the building unit to be installed above the foundation.

3. The method for temporarily waterproofing a building according to claim 2, A method for temporarily waterproofing a building, characterized in that after installing the building unit at the position where the cover piece was removed, a magnet is attached to the side edge of another cover piece that was adjacent to the removed cover piece, and the side edge is magnetically attached to the installed building unit.

4. The method for temporarily waterproofing a building according to claim 2 or 3, overlapping portions are provided on the side edges of the cover pieces, Installing the cover pieces on the foundation in order from the latest to the earliest building unit installation order, with the side edges overlapping each other; A method for temporarily waterproofing a building, characterized in that the cover pieces are removed in order from the earliest to latest installation order of the building units.

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