Temporary rainproofing structure for unit buildings

Abstract

To make it possible to easily perform temporary waterproofing of a building unit mainly by a temporary waterproofing member preliminarily attached to the building unit at a factory.SOLUTION: A temporary waterproofing structure of a unit building includes a building unit 1 having a waterproof zone 8 in the central part of an upper surface 2, and an elongated non-waterproof zone 9 along the waterproof zone 8 outside the waterproof zone 8, and a temporary waterproofing member 31 installed in the non-waterproof zone 9. The temporary waterproofing member 31 is elongated along the non-waterproof zone 9. The temporary waterproofing member 31 is detachably attached to a boundary portion 34 between the waterproof zone 8 and the non-waterproof zone 9 by means of a mounting portion 35 at the periphery of one side portion 33 along a longitudinal direction 32. An other side portion 36 along the longitudinal direction 32 of the temporary waterproofing 31 is deformed from a state temporarily fixed to the upper portion of the building unit 1 by a temporary fixing portion 37 to a state covering the non-waterproof zone 9.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a temporary rainproofing structure for a modular building. [Background technology]

[0002] Some buildings, such as houses, are composed of unit buildings. Unit buildings are buildings that can be constructed in a short period of time by transporting rectangular parallelepiped building units manufactured in advance in a factory to a construction site and assembling them at the construction site (see, for example, Patent Document 1).

[0003] In such building units, it is necessary to prevent rainwater from getting inside the building units from the time of their transportation until the completion of the unit building. For this reason, in Patent Document 1, for example, when it rains, the top of the building unit is covered with a waterproof sheet large enough to cover the entire top surface of the building unit, and the building unit is shipped from the factory to the construction site. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 5-140997 Summary of the Invention [Problem to be solved by the invention]

[0005] As in Patent Document 1, when a building unit is shipped with a waterproof sheet covering the entire upper surface of the building unit covered with the waterproof sheet in rainy weather, the waterproof sheet is a large-sized component, and thus there is a problem that the waterproof sheet is difficult to handle. In addition, in Patent Document 1, the building unit with the waterproof sheet covering the entire upper surface is temporarily placed on the construction site, and after the rain stops, the large-sized waterproof sheet is removed from the top of the building unit and placed on the foundation, or the removed large-sized waterproof sheet is folded and taken back to the factory. Therefore, there is a problem that temporary rainproofing using a large-sized waterproof sheet requires a lot of effort.

[0006] Therefore, a main object of the present invention is to contribute to improving the above-mentioned problems. [Means for solving the problem]

[0007] In response to the above problems, the present invention provides: A building unit having a waterproof zone in the center of an upper surface, and an elongated non-waterproof zone extending along the waterproof zone on the outside of the waterproof zone; A temporary rainproofing member is provided in the non-waterproof zone, The waterproofing member extends elongatedly along the non-waterproof zone, The periphery of one side along the longitudinal direction is detachably attached to the boundary portion of the waterproof zone with the non-waterproof zone by an attachment portion, The temporary rainproofing member is characterized in that the other side portion along the longitudinal direction is deformed from a state in which it is temporarily fixed to the upper part of the building unit by a temporary fixing portion to a state in which it covers the non-waterproof zone, resulting in a temporary rainproofing structure for a unit building. Effect of the Invention

[0008] According to the present invention, the above-mentioned configuration makes it possible to easily perform temporary rainproofing of a building unit without much effort by using the temporary rainproofing members that are pre-attached to the building unit at the factory. [Brief description of the drawings]

[0009] [Figure 1] 1 is an overall perspective view of a building unit to which a temporary rainproofing structure for a unit building according to this embodiment is applied; [Diagram 2] FIG. 2 is an enlarged side view of the upper part of the joint between the building unit of FIG. 1 and an adjacently installed building unit, showing the temporary rainproofing structure of Example 1 (at the time of shipment from the factory or before temporary rainproofing is implemented). [Diagram 3] FIG. 3 is an enlarged side view similar to FIG. 2, showing a state in which temporary weatherproofing has been performed at a construction site. [Figure 4] This is a perspective view showing how a temporary rainproofing material (temporary rainproofing sheet) is attached at a factory to the roof panel in Figure 2. Note that the two roof panels installed on adjacent building units are aligned in the same direction for easy viewing. [Diagram 5] FIG. 5 is an enlarged side view of the outer portions of two roof panels aligned in the same orientation in FIG. 4. [Figure 6] 1A is a perspective view showing the state in which the other side of the temporary rainproofing material is temporarily fastened to the roof panel at the factory, and FIG. 1B is a side view showing the state in which the other side of FIG. [Figure 7] 1A is a perspective view showing a temporary rainproofing member connected by a fastener portion, FIG. 1B is a partially enlarged view of the end portion of FIG. 1A, and FIG. 1C is a vertical cross-sectional view of the position indicated by the arrow in FIG. [Figure 8] This is a plan view of two temporary rainproofing sheets installed on adjacent building units. [Figure 9] 9(a) is a longitudinal cross-sectional view of the two temporary rainproof sheets in FIG. 8, taken along the lines of arrows AA and BB; (b) is an enlarged plan view of the mounting hole provided on one side of the temporary rainproof sheet; and (c) is an enlarged oblique view of the mounting hole provided at the end of the temporary rainproof sheet. [Figure 10] 1A and 1B are perspective views of the temporary rainproofing sheet showing the state in which the fastener portion is closed, where (a) is the state in which closing begins and (b) is the state in which closing is completed. [Figure 11] 4 is a schematic enlarged side view similar to FIG. 3 according to a modified example of the first embodiment. FIG. [Figure 12]FIG. 11 is a perspective view showing a state in which a temporary rainproofing member (water-repellent sheet) is attached to a roof panel in a factory according to a second embodiment. [Figure 13] 13A and 13B are side views of FIG. 12 showing the state in which the water-repellent sheet has been temporarily fixed in the factory, where (a) shows the state in which there is no sheathing support beam and (b) shows the state in which there is a sheathing support beam. [Figure 14] 3 is an enlarged side view similar to FIG. 2, showing the state in which the waterproofing sheet is about to be unfolded after the building units, which have had waterproofing sheets attached to their roof panels in a factory, have been placed adjacent to each other on the construction site. [Figure 15] 15 is an enlarged side view similar to FIG. 3, showing the waterproofing sheet of FIG. 14 spread out at a construction site. [Figure 16] This is a side view of a modified example showing how to use the drainage sheet when there are no adjacent building units. [Figure 17] FIG. 11 is an enlarged side view similar to FIG. 2 showing building units to which temporary rainproofing members (beam-like members and water-repellent sheets) have been attached in a factory, arranged adjacent to each other at a construction site, according to a third embodiment. [Figure 18] 18 is an enlarged side view similar to FIG. 3, showing a state in which an inter-unit temporary rainproof cover is attached between the flange portions of the beam-like members of FIG. 17 at a construction site. [Figure 19] 1 is an oblique view showing the end of a beam-shaped member with an inter-unit temporary rainproof cover attached. FIG. [Figure 20] FIG. 2 is an oblique view of the inter-unit temporary rainproof cover. [Figure 21] A side view showing the attachment state of the inter-unit temporary rainproof cover to the flange portion of the beam-shaped member. [Figure 22] This is a partially enlarged side view showing the connection state between the front and rear inter-unit temporary rainproof covers by the connecting portion and the connected portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the present embodiment will be described in detail with reference to the drawings. 1 to 22 are intended to explain this embodiment. 1 to 10 show Example 1, Fig. 11 shows a modified example of Example 1, Figs. 12 to 16 show Example 2, and Figs. 17 to 22 show Example 3. Note that the configuration described in any of the embodiments can be applied to the other embodiments as necessary. EXAMPLES

[0011] Buildings such as houses are constructed from unit buildings. Unit buildings are buildings that can be constructed in a short period of time by transporting prefabricated building units to the construction site, where they are lined up and assembled on foundations.

[0012] <Configuration> The configuration of this embodiment will now be described.

[0013] As shown in FIG. 1, the building unit 1 used in the unit building is a roughly box-shaped structure with a roughly rectangular parallelepiped shape. The rectangular parallelepiped building units 1 are, for example, installed side by side on a foundation set up on the construction site to form the lower floors of the building. The upper floors of the building are formed by stacking and installing (or placing) building units 1 on top of the building units 1 of the lower floors. The main body of the building is formed by combining and installing the building units 1 in this way. Depending on how the building units 1 are combined, the main body of the building can be a single-story building, a two-story building, a multi-story building with three or more stories, etc.

[0014] The rectangular parallelepiped building unit 1 has hanging fittings 4 that can be attached and detached to or around each of the four corners of the top surface 2. By attaching the hanging fittings 4 to the building unit 1, the building unit 1 can be lifted by a crane via hanging members 5 such as chains or wires. This makes it possible to lift the building unit 1 at the construction site and perform work to construct the main building body. The hanging fittings 4 are removed from the building unit 1 after the building unit 1 has been installed.

[0015] A roof is provided on top of the building body. The roof is mainly installed on top of the building unit 1 on the top floor. However, depending on the configuration of the building body, there are also cases where a roof is installed on a building unit 1 on a lower floor. The following describes an example of installing a roof on a building unit 1 on the top floor, but the same applies when installing a roof on a building unit 1 on a lower floor.

[0016] There are various types of roofs, but in this embodiment, the main part of the roof is formed by installing roof panels 7 in advance at a factory on the top floor of the building unit 1. A number of roof panels 7 are installed side by side in the central part of the top surface 2 of the building unit 1. The remaining part (peripheral part) of the top surface 2 of the building unit 1 where the roof panels 7 are not installed is roofed by finishing work at the construction site.

[0017] The roof panel 7 itself is waterproof, and waterproofing is also performed on the connecting parts between roof panels 7 installed side by side within the same building unit 1. Therefore, the entire area of ​​the part of the top surface 2 of the building unit 1 where the roof panel 7 is installed becomes a waterproof zone 8 with sufficient waterproof performance. As a result, most of the top surface 2 of the building unit 1 becomes the waterproof zone 8. Also, the remaining part of the top surface 2 of the building unit 1 where the roof panel 7 is not installed (the peripheral part outside the waterproof zone 8) leaves a small part on the top surface 2 of the building unit 1 as a non-waterproof zone 9.

[0018] The non-waterproof zone 9 is an area on the top surface 2 of the building unit 1 that does not have waterproof performance. The non-waterproof zone 9 is formed in a portion (peripheral portion) where the roof panel 7 is not installed by attaching the roof panel 7 to the corner portion of the top surface 2 of the building unit 1 by recessing it a required amount (retraction amount) toward the inside of the building unit 1 so that the hanging brackets 4 can be attached. The portion where the roof panel 7 is not installed is specifically the upper edge 11 on the top surface 2 of the building unit 1 and the elongated portion around it.

[0019] The upper edge 11 of the building unit 1 is the four sides connecting the four corners of the top surface 2 of the building unit 1, which is substantially rectangular (or oblong) in plan view, and one or more of these sides form the non-waterproof zone 9. Note that the inside of the building unit 1, in terms of the top surface 2 of the building unit 1, is a position within the plane with the upper edge 11 as the boundary, and conversely, the outside is a position outside the plane that is outside the upper edge 11 of the building unit 1. Also, with respect to a certain position, the direction toward the inside of the building unit 1 may be referred to as the inside of the building unit 1, and conversely, the direction toward the outside of the building unit 1 may be referred to as the outside of the building unit 1.

[0020] The non-waterproof zone 9 is formed as an elongated strip extending continuously along the upper edge 11 of the top surface 2 of the building unit 1, with a width equal to the retraction amount of the roof panel 7. Depending on the size and retraction method of the roof panel 7, the non-waterproof zone 9 may be formed, for example, in a rectangular ring shape along all four upper edges 11 that form the outline of the top surface 2 of the building unit 1. The non-waterproof zone 9 may be formed in two parallel locations along two upper edges 11 that are opposite each other on the top surface 2 of the building unit 1, or in other cases (formed in one location or three locations).

[0021] In this embodiment, a case will be described in which two parallel non-waterproof zones 9 are formed along two upper edges 11 along the long sides of the top surface 2 of the building unit 1. However, if the non-waterproof zones 9 are formed on all the upper edges 11 of the building unit 1 and are connected in a ring shape, this can be dealt with by applying the same temporary rainproofing structure as that on the long sides to the non-waterproof zones 9 on the remaining two upper edges 11 along the short sides. The same applies to other cases.

[0022] As shown in Figure 2 (Figure 3), the non-waterproof zone 9 is formed by installing multiple building units 1 side by side, with two of the building units 1 joined together between the adjacent upper edges 11 of the adjacent building units 1.

[0023] Here, the building unit 1 may be a steel-framed one or a wood-framed one. For example, a steel-framed building unit 1 has a box-framed unit frame in its skeleton, in which the upper ends of four metal columns are connected in a rectangular shape by four metal ceiling beams, and the lower ends of the four columns are connected in a rectangular shape by four metal floor beams. The unit frame has a hexahedral shape that defines an upper surface, a lower surface, and four side surfaces, and in the building unit 1, a surface material is appropriately attached to at least one of the surfaces of the unit frame.

[0024] The roof panel 7 may be attached directly to the top surface 2 of the building unit 1, or a roof frame 15 of approximately the same shape and size as the top surface 2 may be installed on the top surface 2 of the building unit 1, and the roof panel 7 may be attached on top of the roof frame 15. In this embodiment, for convenience, the roof panel 7 will be described as being attached on top of the roof frame 15. In this case, the top surface 2 of the building unit 1 should be read as the top surface of the roof frame 15. Also, when the roof panel 7 is attached directly to the top surface 2 of the building unit 1 without providing the roof frame 15, the roof frame 15 etc. should be read as the ceiling frame of the building unit 1 etc. as appropriate.

[0025] The roof frame 15 is formed, for example, by four roof beams 16 formed in a substantially rectangular shape in a plan view, and connecting beams 17 connecting the roof beams 16. The four roof beams 16 are respectively installed directly above the four ceiling frames of the building unit 1, forming the upper edge 11 of the building unit 1. The four roof beams 16 are provided in two pairs of equal lengths (for the long sides and one for the short sides) arranged parallel to each other.

[0026] The connecting beams 17 are installed inside the roof frame 15 so as to connect a pair of opposing roof beams 16. Multiple connecting beams 17 of the same length are installed in parallel at intervals. For example, multiple connecting beams 17 extend in the short side direction of the roof frame 15 (left and right direction in Figure 2) and are installed in parallel at intervals in the long side direction of the roof frame 15 (direction perpendicular to the paper surface of Figure 2). Figure 2 shows a portion of the roof beam 16 that forms the long side.

[0027] The roof panel 7 is attached on top of the connecting beams 17. The roof panel 7 is not attached at least near the ends of the connecting beams 17 and above the roof beams 16 on which the connecting beams 17 are installed. By attaching the roof panel 7 on top of the connecting beams 17, the upper surface of the roof panel 7 becomes higher than the upper surface 2 of the building unit 1 by approximately the thickness of the roof panel 7. This creates a height difference of approximately the thickness of the roof panel 7 between the waterproof zone 8 where the roof panel 7 is installed and the non-waterproof zone 9 where the roof panel 7 is not installed. This height difference is filled by auxiliary roofing materials such as inter-unit vertical cover members (not shown) during the roof finishing work.

[0028] As shown in Figures 4 (to 6), the roof panel 7 is a long, narrow panel that is approximately rectangular in plan view, formed by installing and integrating a sheathing board 22, which serves as the surface material, and a base steel plate 23 between a pair of parallel metal roof frames 21 on the left and right that are equal in length (Figure 4 shows only the roof frame 21 on one side).

[0029] A single or multiple roof panels 7 are installed and fixed to the top surface 2 of the building unit 1. When multiple roof panels 7 are installed, the roof panels 7 may be arranged side by side with their long sides (roof frames 21) close to each other and aligned in the short side direction. The roof panels 7 may also be arranged vertically with their short sides close to each other and continuous in the long side direction. Furthermore, horizontal and vertical arrangements may be combined. The orientation of the roof panels 7 attached to the roof frame 15 may be aligned so that the long sides are parallel to each other, or so that the long sides and short sides are parallel to each other.

[0030] As shown in FIG. 5, the roof frame 21 is a long metal member having an inward C-shaped cross section, which is composed of a vertical web portion 21a and horizontal upper and lower flanges 21b and 21c. The lower flange 21c of the roof frame 21 is wider than the upper flange 21b so that the roof frame 21 is stable when installed. The upper flange 21b is positioned at approximately the height of the upper surface of the roof panel 7. With the lower flange 21c abutting against the upper portion of the connecting beam 17, the lower flange 21c and the lower portion of the web portion 21a of the roof frame 21 are fixed to the upper surface of the connecting beam 17 (FIG. 2). In this embodiment, the lower portion of the outer surface of the web portion 21a of the roof frame 21 is fixed to the connecting beam 17 by fastening fixtures such as corner fittings, bolts and nuts, and drill screws.

[0031] The sheathing boards 22 are flat plates that are approximately rectangular in plan view and have approximately the same length as the roof frames 21 and approximately the same width as the distance between the pair of roof frames 21. The sheathing boards 22 are attached on top of left and right guide rung members 24 that are attached obliquely along the insides of the side surfaces (web portions 21a) of the left and right roof frames 21, and are attached in an inclined state to provide a drainage gradient.

[0032] The base steel plate 23 is a waterproof and corrosion-resistant metal thin plate having a flat main surface 23a at the middle in the width direction, which has approximately the same shape and size as the sheathing board 22. The base steel plate 23 is installed between the left and right roof frames 21 so as to form a drainage gradient together with the sheathing board 22, with the main surface 23a in contact with the upper surface of the sheathing board 22 and covering almost the entire upper surface of the sheathing board 22. The inclination of the sheathing board 22 and the base steel plate 23 is shown in the figures by drawing them doubly with solid and imaginary lines (e.g., FIG. 2).

[0033] The base steel plate 23 is a hat-shaped cross-section member having a rising portion 23b and a horizontal flange 23c integrally formed on both sides in the width direction of the main surface 23a. The rising portion 23b rises up to the upper position of the roof frame 21 in a state of being separated from the web portion 21a of the roof frame 21 by a required amount (the width of the horizontal flange 23c) and is approximately parallel to the web portion 21a of the roof frame 21. The horizontal flange 23c extends horizontally from the upper end of the rising portion 23b along the upper portion (upper flange 21b) of the roof frame 21. The horizontal flange 23c of the base steel plate 23 is disposed in contact with the upper portion of the roof frame 21 and is fixed in contact from above. The main surface 23a of the base steel plate 23 is smaller in width than the sheathing board 22 by approximately the width of the horizontal flange 23c, and is separated from the web portion 21a of the roof frame 21.

[0034] The roof panel 7 can include a solar cell panel 25 on the base steel plate 23. The solar cell panel 25 has a substantially rectangular shape in plan view and is sized to fit between the pair of roof frames 21. With the solar cell panel 25 installed in a position between the left and right roof frames 21, it is attached from above to the upper parts of the left and right roof frames 21 (the horizontal flanges 23c of the base steel plate 23) via solar cell panel mounting brackets 28 (FIG. 2).

[0035] Solar cell panels 25 are installed in a floating, non-contact state on main surface 23a of base steel plate 23, and multiple panels are arranged side by side along the long side of roof panel 7 (direction perpendicular to the paper surface of FIG. 5). Multiple solar cell panels 25 are attached to roof panel 7 at an incline so that each panel has its own drainage gradient. The inclined state of solar cell panels 25 is shown in the drawings by doubling the solid and imaginary lines (FIG. 2, etc.).

[0036] In the state of shipment from the factory, a protective sheet 27 (including a protective mat that is thicker and has cushioning properties than a sheet) is attached to the surface of the solar cell panel 25 so as to cover the entire surface of the solar cell panel 25 in order to prevent damage to the solar cell panel 25. Gaps between the protective sheets 27 on the surfaces of the solar cell panels 25 arranged side by side are appropriately sealed with masking tape or the like (see FIG. 4, etc.).

[0037] In addition to the basic configuration described above, this embodiment can have the following configuration.

[0038] (1-1) As shown in Figs. 2 and 3, the temporary rainproofing structure of a unit building mainly comprises a building unit 1 (Fig. 1) having a waterproof zone 8 in the center of the upper surface 2 and a long and narrow non-waterproof zone 9 along the waterproof zone 8 on the outside of the waterproof zone 8; A temporary rainproofing member 31 is provided in the non-waterproof zone 9. The temporary rainproofing member 31 may extend in an elongated manner along the non-waterproof zone 9. The rainproofing member 31 may be removably attached to the boundary portion 34 (FIG. 2) of the waterproof zone 8 with the non-waterproof zone 9 by an attachment portion 35 along the periphery of one side portion 33 in the longitudinal direction 32 (FIG. 4). The temporary rainproofing member 31 may be configured so that the other side portion 36 along the longitudinal direction 32 is capable of being deformed (or freely deformed) from a state in which it is temporarily fixed to the upper portion of the building unit 1 by a temporary fixing portion 37 (Figure 6) to a state in which it covers the non-waterproof zone 9 (Figures 7 and 3).

[0039] Here, temporary waterproofing refers to, for example, temporarily waterproofing the upper part of a building body to protect it from rainwater and the like while the building is under construction. In the case of a typical building, temporary waterproofing is carried out as appropriate, for example, after the framework of the building body on the site is completed and before the roof is completed. In the case of a unit building, temporary waterproofing is carried out as appropriate as necessary between the time the building unit 1 is shipped from the factory and the time the roof is finished at the construction site. Once the roof is completed, temporary waterproofing is no longer necessary.

[0040] Therefore, the temporary rainproofing is temporary and may or may not be performed depending on the weather, work conditions, etc. Therefore, it is essentially different from, for example, the waterproofing structure of a building, which is not temporary but needs to be installed continuously. The building of this embodiment is also provided with a waterproofing structure in addition to the temporary rainproofing.

[0041] The temporary rainproofing member 31 is a member having the waterproofing required for temporary rainproofing, and is attached to at least the building unit 1 of the top floor as necessary during the manufacturing process of the building unit 1 at a factory. In this way, the building unit 1 becomes a product that is equipped with the temporary rainproofing member 31 in advance.

[0042] The temporary rainproofing member 31 is intended to put the non-waterproof zone 9 into a temporary rainproof state immediately after the construction of the main body of the building at the construction site. The non-waterproof zone 9 being in a temporary rainproof state means either that the non-waterproof zone 9 has already been rainproofed when the member is installed at the construction site, or that the non-waterproof zone 9 can be immediately put into a temporary rainproof state immediately after the member is installed at the construction site. The temporary rainproofing member 31 of this embodiment can be used in either of the above cases.

[0043] The temporary rain stop member 31 in this embodiment is installed in a long and narrow non-waterproof zone 9 formed along any one of the four sides constituting the upper edge portion 11 of the building unit 1. The temporary rain stop member 31 can be provided on the building unit 1 as many times as the number of non-waterproof zones 9 formed along the upper edge portion 11. In this embodiment, a temporary rain stop member 31 provided in one long and narrow non-waterproof zone 9 formed along one of the long sides of the building unit 1 will be described.

[0044] The temporary rainproofing members 31 are members prepared so that they can be selectively attached to the building unit 1 at the factory depending on the specifications of the building unit 1 (for example, specifications for bad weather) and the weather conditions at the time of shipment. The temporary rainproofing members 31 are used temporarily on the building unit 1, and after their temporary use, are removed from the building unit 1 at an appropriate timing when there is no longer any possibility of rain before the roof finishing work. The removed temporary rainproofing members 31 are brought back to the factory and reused later on in other building units 1 being manufactured.

[0045] However, the temporary rain stopping members 31 may be installed on the building unit 1 as part of process management, and temporary rain stopping may be performed without fail. Also, if there is no effect on the subsequent condition of the building unit 1, the temporary rain stopping members 31 may be left on the building unit 1 without being removed after temporary rain stopping. Even if the temporary rain stopping members 31 are left, as described above, the building unit 1 is provided with a waterproof structure that is normally required in addition to the temporary rain stopping members 31.

[0046] In this embodiment, the temporary rainstop member 31 is a soft planar member that is attached integrally to the building unit 1 in advance at a factory, and is basically folded up into a small bundle and temporarily fastened to the building unit 1 before being transported to the construction site together with the building unit 1. After the building unit 1 is installed at the construction site, the temporary fastening of the temporary rainstop member 31 is removed, allowing it to be quickly spread out on the spot into the non-waterproof zone 9. Specific details of the temporary rainstop member 31 will be described later.

[0047] The longitudinal direction 32 is the direction in which the elongated non-waterproof zone 9 and the temporary rainstop member 31 extend along one of the upper edges 11 of the building unit 1, and in this embodiment is the direction of the long side of the upper surface 2 of the building unit 1 or the long side of the temporary rainstop member 31. For example, in Figure 2, the longitudinal direction 32 is perpendicular to the plane of the paper.

[0048] The periphery of one side portion 33 along the longitudinal direction 32 refers to the side edge portion (base end edge portion) or its surrounding portion that is on the waterproof zone 8 side (inner side with respect to the building unit 1) of both side edges (long sides) located on both sides of the width of the temporary rain stop member 31 and extending in the longitudinal direction 32.

[0049] The boundary portion 34 is the portion that forms the boundary between the waterproof zone 8 and the non-waterproof zone 9. Specifically, the boundary portion 34 is the position of the side surface (web portion 21a) of the outermost roof frame 21 that faces the non-waterproof zone 9 in the roof panel 7 installed on the outermost side of the waterproof zone 8. Hereinafter, the above may be simply referred to as the outer roof frame 21. The boundary portion 34 extends along the longitudinal direction 32 of the non-waterproof zone 9.

[0050] The mounting portion 35 is a portion or member for mounting the temporary rainproofing member 31 to the building unit 1 or the like. In this embodiment, a fastener 35a such as a drill screw is used for the mounting portion 35. The temporary rainproofing member 31 may have pilot holes 38 (through holes, FIG. 8) formed in advance as the mounting portion 35 at the position where the mounting portion 35 will be mounted with the fastener 35a. A plurality of pilot holes 38 are formed at required intervals in the longitudinal direction 32. It is preferable to reinforce the pilot holes 38 by attaching metal grommets.

[0051] The temporary rainstop member 31 is fixed from above with fasteners 35a, with the periphery of one side portion 33 installed on the top of the upper flange 21b of the outer roof frame 21, or on the top of the horizontal flange 23c of the base steel plate 23. Conversely, by removing the fasteners 35a, the temporary rainstop member 31 can be removed from the roof frame 21 in a sound, reusable state without being destroyed.

[0052] In addition to the temporary rain stop member 31, the horizontal flange 23c of the base steel plate 23 and the solar panel mounting bracket 28 are attached with similar fasteners 35a (screw members such as drill screws) to the top surface of the upper flange 21b of the roof frame 21. The temporary rain stop member 31 may be fixed separately from these, or may be fastened together with them using the same fasteners 35a to fix them together.

[0053] The other side 36 along the longitudinal direction 32 refers to the side edge (tip edge) or its surrounding area that is on the opposite side (outside with respect to the building unit 1) from the waterproof zone 8, among both side edges (long sides) located on both sides in the width direction of the temporary rain stopping member 31 and extending in the longitudinal direction 32. Basically, the other side 36 of the temporary rain stopping member 31 is preferably configured so that it can cover the entire non-waterproof zone 9 of the building unit 1 by projecting outward beyond the upper end edge 11 of the building unit 1 when the temporary rain stopping member 31 is unfolded.

[0054] The upper part of the building unit 1 to be temporarily fastened refers to a higher part that is above the center position in the height direction (vertical direction) of the building unit 1. The other side part 36 of the temporary rainproofing member 31 may be temporarily fastened anywhere on the upper side of the building unit 1 as long as it does not interfere with various operations such as manufacturing, transportation, and lifting of the building unit 1. It is preferable to temporarily fasten the other side part 36 near the top surface 2 of the building unit 1 or at a position higher than the top surface 2.

[0055] For example, in the waterproof zone 8, the upper surface (covering sheet 27, FIG. 6) or side surface (outer surface of web portion 21a of outer roof frame 21, FIG. 6) of roof panel 7 can be positioned as the upper part of building unit 1. Also, in the non-waterproof zone 9, the upper surfaces of roof beams 16 and connecting beams 17 and the upper parts of the sides of building unit 1 can be positioned as the upper part of building unit 1. The other side portion 36 of temporary rain stopping member 31 or its periphery can be temporarily fastened to these parts with temporary fastening portion 37. In this embodiment, the other side portion 36 of temporary rain stopping member 31 is mainly temporarily fastened to the upper surface and side surface of roof panel 7.

[0056] The temporary fastening portion 37 is a member, a shape of a part, and a structure for temporarily fastening the other side portion 36 of the temporary rain stop member 31 and its surroundings. The temporary fastening portion 37 is one that can maintain the temporary fastening state without damaging the other side portion 36 of the temporary rain stop member 31.

[0057] For the temporary fastening portion 37, it is preferable to use an adhesive tape such as masking tape that has a suitable adhesive strength to reliably hold (temporarily fasten) the other side portion 36 of the temporary rainstop member 31 in a fixed state for a certain period of time, while being able to be repeatedly peeled off and reapplied without leaving any marks. When masking tape is used as the temporary fastening portion 37, the temporary rainstop member 31 is temporarily fastened by sticking and fixing the other side portion 36 or its periphery to the upper portion of the building unit 1.

[0058] The state in which it is temporarily fixed by the temporary fastening portion 37 is the state before the temporary rain stopping member 31 is used for temporary rain stopping (standby state), and the state in which it covers the non-waterproof zone 9 is the state in which the temporary rain stopping member 31 is used for temporary rain stopping (used state). As shown in Fig. 6, the temporary rain stopping member 31 can be attached to the side surface of the outer roof frame 21 by the temporary fastening portion 37 in a standby state in which the other side portion 36 is rolled up so that the width dimension can be shortened and made compact.

[0059] Also, for example, the temporary rainproofing member 31 can be folded back to the side opposite the spreading direction (the side of the roof panel 7) so as not to get in the way, and can be attached to the upper surface (protection sheet 27) of the roof panel 7 provided on the building unit 1 with a temporary fastening portion 37.

[0060] In this case, it is preferable to attach the temporary fastening parts 37 mainly to both end positions in the longitudinal direction 32 of the temporary rain stopping member 31. It is also preferable to avoid attaching the temporary fastening parts 37 to the intermediate positions in the longitudinal direction 32 of the temporary rain stopping member 31 as much as possible.

[0061] That is, the attachment range (temporary fastening range) of the temporary fastening portion 37 on both ends of the longitudinal direction 32 of the temporary rain stopping member 31 should desirably be within a range where the temporary fastening portion 37 (masking tape or the like) can be handled without hindrance from both ends of the temporary rain stopping member 31 without climbing onto the roof. Specifically, the range that can be reached directly from both ends of the temporary rain stopping member 31, or the range where operating force can be effectively transmitted to the temporary fastening portion 37 even if it is not directly reachable, is set as the most desirable temporary fastening range for temporary fastening. The other intermediate positions in the longitudinal direction 32 where operating force cannot be effectively transmitted to the temporary fastening portion 37 are set as the temporary fastening restriction range that is undesirable for temporary fastening.

[0062] For example, when the temporary rain stop material 31 is temporarily fixed to the side of the outer roof frame 21 in a rolled state, the masking tape as the temporary fastening portion 37 is preferably positioned within two temporary fastening ranges on both ends of the longitudinal direction 32 of the temporary rain stop material 31. It is preferable to apply one or more pieces of masking tape to positions within the temporary fastening range that are directly reachable. In this case, the masking tape is applied almost vertically (vertically) so as to straddle the side of the roof frame 21 and the rolled and unrolled parts of the temporary rain stop material 31.

[0063] However, when applying masking tape vertically, there is no problem if you apply additional masking tape temporarily to the part within the temporary fastening regulation range in about one or two places. This is because the adhesive strength of the masking tape per place is small, and the masking tape is constantly subjected to a force that tries to rewind the temporary rainstop material 31 due to its own weight, so it can be easily peeled off even if you cannot reach it directly with your hands.

[0064] Also, for example, when the temporary rainstop member 31 is folded back toward the waterproof zone 8 and the other side portion 36 is temporarily fixed to the upper surface of the roof panel 7 (the protective sheet 27), the protective tape as the temporary fixing portion 37 is applied only to positions within the temporary fixing range at two locations on both ends of the temporary rainstop member 31 in the longitudinal direction 32. In this case, it is preferable that the protective tape is applied in the longitudinal direction 32 so as to straddle between the temporary rainstop member 31 and the protective sheet 27 in a continuous, seamless state along the other side portion 36. Since the protective tape can effectively transmit force to the opposite end if it is about 2 m long, depending on the strength of the base material, the protective tape is applied appropriately to the part within the temporary fixing range within about 2 m from both ends of the temporary rainstop member 31, without cutting it halfway and adding it. In this case, since it becomes difficult to peel it off, the temporary fixing with the protective tape is not performed in the temporary fixing regulation range in the middle of the longitudinal direction 32.

[0065] (1-2) In the above, the temporary rainproofing member 31 may be a temporary rainproofing sheet 41 as shown in FIG. 7 (to FIG. 10). The temporary rainproof sheet 41 may have a fastener portion 43 on the other side portion 36 . The fastener portion 43 may be connected to another fastener portion 43 on the other side portion 36 of another temporary rainproofing sheet 41(R) attached as a temporary rainproofing member 31 to an adjacently installed building unit 1(R). A lead cord 45 may be attached to the slider 44, extending from one end side to the other end side in the longitudinal direction 32 of the temporary rainproofing member 31.

[0066] Here, in two adjacent building units 1, the same reference numerals are basically used for equivalent components, and when a particular distinction is required, (L) or (R) is added to the common reference numerals indicating each component for explanation. Based on Figures 7 and 2, (L) is added to the building unit 1 located on the left side and its components when necessary, and (R) is added to the building unit 1 located on the right side and its components when necessary. In this embodiment, the explanation focuses on the building unit 1 (L) located on the left side. Note that (L) and (R) are used only when necessary. Also, (L) and (R) may not be indicated on the drawings.

[0067] The temporary rain-proofing sheet 41 is a planar temporary rain-proofing member 31. The temporary rain-proofing sheet 41 is preferably a synthetic resin sheet made of, for example, polyethylene (polyethylene waterproof laminate sheet). This temporary rain-proofing sheet 41 is the same as that used as a work sheet at construction sites, etc., because it is waterproof, inexpensive, lightweight, durable, and easy to use. In addition, this temporary rain-proofing sheet 41 is the same as that effectively used for various purposes as a multi-purpose sheet in the fields of, for example, outdoor activities, leisure, and disaster prevention.

[0068] Basically, the temporary rain stopping sheet 41 is preferably a single, long member that is approximately rectangular in plan view and has a length dimension approximately equal to the length of the non-waterproof zone 9 and a width dimension approximately equal to the width of the non-waterproof zone 9. However, if sufficient waterproofing is ensured, the planar temporary rain stopping member 31 may be used by joining short sheets together to form an integrated unit. Planar temporary rain stopping members 31 such as the temporary rain stopping sheet 41 should be used with as few penetrations as possible, such as holes or cuts that could cause rainwater to leak.

[0069] Since the temporary rain stopping sheet 41 is a relatively thick temporary rain stopping member 31, it is preferable to remove and collect it after use. The specific size and shape of the temporary rain stopping sheet 41 will be described later. In addition, by using the temporary rain stopping sheet 41, the temporary rain stopping member 31 can obtain the strength required to attach a connector such as a fastener part 43.

[0070] An adjacently installed building unit 1 (R) refers to an unspecified building unit 1 (hereinafter referred to as one of the building units 1 (L)) among the multiple building units 1 that make up the building body of a unit building, which is placed adjacent to the other building unit 1 (R).

[0071] The other temporary rainproofing sheet 41(R) is formed of the same material as the above-mentioned temporary rainproofing sheet 41 and performs the same function. The other temporary rainproofing sheet 41(R) is attached to the other building unit 1(R) at a position capable of covering the non-waterproof zone 9 on the side adjacent to one building unit 1(L) by the attachment portion 35 at one side portion 33 (base end edge portion) in a manner substantially similar to that of the temporary rainproofing sheet 41(L). The other temporary rainproofing sheet 41(R) is installed on the other building unit 1(R) so as to be in a left-right opposite relationship with the temporary rainproofing sheet 41(L) of the adjacent one building unit 1(L).

[0072] Although not shown, another temporary rainproofing sheet 41(R) can be attached to the non-waterproof zone 9 along the opposite long side (not shown) of one building unit 1(L) as needed so as to cover the non-waterproof zone 9 on the opposite side. Similarly, the temporary rainproofing member 31(L) described above can be attached to the non-waterproof zone 9 along the opposite long side (not shown) of the other building unit 1(R) so as to cover the non-waterproof zone 9 on the opposite side.

[0073] The other side 36 of the other temporary rainproofing sheet 41(R) refers to the side edge (tip edge) adjacent to the other side 36 of the temporary rainproofing sheet 41(L) of one building unit 1(L). The temporary rainproofing sheet 41(L) and the other temporary rainproofing sheet 41(R) may be used separately to cover the respective non-waterproof zones 9 individually. In this case, the other side 36 of the temporary rainproofing sheet 41 may be fixed to the adjacent building unit 1 with masking tape or by using a connector, which will be described later. For example, the connector of the other party is (directly) attached to the adjacent building unit 1.

[0074] In this embodiment, the temporary rain stopping sheet 41(L) and another temporary rain stopping sheet 41(R) are connected at the other side portions 36 so that they can be used as one unit. The fastener portion 43 is a connector that connects the temporary rain stopping sheet 41(L) and another temporary rain stopping sheet 41(R). The temporary rain stopping sheet 41(L) and another temporary rain stopping sheet 41(R) that are integrated by the connector simultaneously cover both the two adjacent non-waterproof zones 9 and the portion between them (gap 65).

[0075] For this purpose, the temporary rainproof sheet 41(L) and another temporary rainproof sheet 41(R) are arranged so that the total width dimension when integrated is approximately the same as or larger than the combined width dimension of both non-waterproof zones 9.

[0076] In this embodiment, there is a height difference between the upper surface 2 of the building unit 1 and the upper surface of the roof panel 7. Therefore, the combined width of the temporary rainproofing sheet 41(L) and the separate temporary rainproofing sheet 41(R) is set to a size approximately equal to the combined width of both non-waterproof zones 9 plus the height difference between the left and right and a slight margin. As a result, the connected temporary rainproofing sheet 41(L) and the separate temporary rainproofing sheet 41(R) are deformed into a concave shape that approximately follows the concave portion formed in the non-waterproof zone 9 by the height difference.

[0077] Here, the temporary rainproofing sheet 41(L) and the separate temporary rainproofing sheet 41(R) will be described.

[0078] The temporary rainproof sheet 41(L) and the other temporary rainproof sheet 41(R) may be made to have approximately the same width dimension and connected at a midpoint between one building unit 1(L) and the other building unit 1(R).

[0079] However, in this embodiment, the temporary rain stopping sheet 41(L) and the other temporary rain stopping sheet 41(R) are made to have different widths and are connected at a position midway through the height difference portion. This prevents the joint between the other side portions 36 of the temporary rain stopping sheet 41(L) and the other temporary rain stopping sheet 41(R) from being at the lowest position in the middle where rainwater is likely to accumulate.

[0080] In this embodiment, the width of the temporary rain stopping member 31(L) is made large and the width of the separate temporary rain stopping sheet 41(R) is made small, so that the seam is located at a relatively high vertical position midway through the height difference portion on the right side of the figure. However, the opposite to the above may be made by making the width of the temporary rain stopping sheet 41(L) small and the width of the separate temporary rain stopping sheet 41(R) large, so that the seam is located at a relatively high vertical position midway through the height difference portion on the left side of the figure.

[0081] In addition, if the width dimensions of the temporary rain stopping sheet 41(L) and another temporary rain stopping sheet 41(R) are made different from each other, there is a risk of an installation error occurring in which the temporary rain stopping sheet 41(L) and another temporary rain stopping sheet 41(R) are mistakenly installed in the wrong direction on the building unit 1. Therefore, as a measure to prevent installation errors, a mark 51 may be provided on the building unit 1, etc.

[0082] For example, by setting the sheathing board support beams 52, which are installed on the outer surface of the side surface (web portion 21a) of the outer roof frame 21 and are used during roof finishing work, at different heights, the difference in the mounting positions of the sheathing board support beams 52 becomes the markers 51. This makes it possible to form the markers 51 using existing materials, eliminating the need to prepare special materials for the markers 51.

[0083] The sheathing board support beams 52 are metal members for supporting sheathing boards (not shown) that are attached to the non-waterproof zone 9 during roof finishing work. The sheathing board support beams 52 are angle members with an L-shaped cross section and are formed to be approximately the same length as the roof frame 21, and are attached to the side of the outermost roof frame 21 in a factory in an approximately horizontal state. At this time, the sheathing board support beams 52 are attached with the horizontal surface portion that forms the L-shaped cross section protruding outward and the vertical surface portion facing downward. Between the sheathing board support beams 52 installed at different heights, waterproof inter-unit vertical cover members are attached at an angle. The inter-unit vertical cover members have sheathing boards to be attached to the sheathing board support beams 52.

[0084] By attaching the sheathing board support beams 52 to the side of the roof frame 21, the temporary rain stopping member 31 (temporary rain stopping sheet 41) is separated from the side of the roof frame 21 by the amount of projection of the lateral portion of the sheathing board support beams 52. In other words, when the temporary rain stopping member 31 (temporary rain stopping sheet 41) is spread out over the non-waterproof zone 9, it passes through a position separated from the side of the roof frame 21 and extends in the vertical direction over the height difference portion.

[0085] For example, a temporary rainproof sheet 41(L) with a larger width is attached to the side where the installation position of the sheathing support beam 52 is lower, and another temporary rainproof sheet 41(R) with a smaller width is attached to the side where the installation position of the sheathing support beam 52 is higher. However, it may also be arranged to install the temporary rainproof sheet 41(L) with a larger width to the side where the installation position of the sheathing support beam 52 is higher, and another temporary rainproof sheet 41(R) with a smaller width to the side where the installation position of the sheathing support beam 52 is lower.

[0086] Furthermore, as shown in Fig. 8 (Fig. 9), at least one side portion 33 of the temporary rain-proofing sheet 41 may be provided with an overlapping portion 53 that overlaps the upper side of the main portion of the temporary rain-proofing sheet 41. The overlapping portion 53 is provided as a protective member that protects the main portion of the temporary rain-proofing sheet 41. By providing the overlapping portion 53 to double the temporary rain-proofing sheet 41, the mounting portion 35 (prepared hole 38) and the connector of the joint (fastener portion 43), which have low waterproofing properties, can be covered from above by the overlapping portion 53 to protect them from rainwater.

[0087] The overlapping portion 53 is formed, for example, by providing a similar temporary-rain-proofing sheet piece made of the same material as the temporary-rain-proofing sheet 41 and having the same length and required width. Then, this temporary-rain-proofing sheet piece is placed so as to overlap on the temporary-rain-proofing sheet 41, and sewn to one side portion 33 of the temporary-rain-proofing sheet 41. This allows the overlapping portion 53 to be formed on the temporary-rain-proofing sheet 41.

[0088] In this embodiment, one side portion 33 of the temporary rainproof sheet 41 is extended in the width direction by the size of the overlapping portion 53, and then folded back in half toward the other side portion 36 so that the extended portion is on top, thereby forming an integral overlapping portion 53 on top of the temporary rainproof sheet 41.

[0089] The width of the overlapping portion 53 is set to be at least large enough to cover and hide the mounting portion 35 from above. In addition, for the smaller temporary rainproofing sheet 41(R), the width of the overlapping portion 53 may be larger than the width of the smaller temporary rainproofing sheet 41 (its main body) so that the fastener portion 43 can also be covered and hidden at the same time.

[0090] When the overlapping portion 53 is provided integrally by extending one side portion 33 of the temporary rain-proofing sheet 41, the pilot hole 38 is formed in the middle portion in the width direction of the entire extended temporary rain-proofing sheet 41. When the extended portion is folded back to form the overlapping portion 53, the pilot hole 38 is positioned around the periphery of one side portion 33 of the temporary rain-proofing sheet 41. Also, in the one side portion 33, it is preferable to reinforce the overlapping portion 53 by sewing between the main body portion and the overlapping portion 53 along the longitudinal direction 32 so that the overlapping portion 53 is kept folded in two.

[0091] The fastener portion 43 is a connector (connecting member) for connecting and integrating the other side portions 36 of the temporary rainproofing sheet 41 in a state where they are substantially butted together. The fastener portion 43 is mainly composed of a ribbon tape having a large number of interlocking portions called teeth along one side edge. The fastener portion 43 is used in pairs together with the slider 44 to form a fastener.

[0092] The fastener portion 43 has a length that extends continuously over almost the entire length of the other side portion 36 of the temporary rainproof sheet 41, and is attached along the other side portion 36 with its teeth facing outward. The side edge of the fastener portion 43 (the side without the teeth) is sewn to the other side portion 36 of the temporary rainproof sheet 41.

[0093] The slider 44 is an operating member that slides in the longitudinal direction 32 along the teeth of the fastener portion 43 (FIG. 10). The sliding movement of the slider 44 engages and disengages the teeth of the left and right fastener portions 43, closing and opening the pair of fastener portions 43. By closing the fastener portion 43, the pair of temporary rainproof sheets 41 are connected, and by opening the fastener portion 43, the pair of temporary rainproof sheets 41 are separated. When the fastener portion 43 is closed, the teeth engage with each other and the gap between adjacent teeth becomes smaller, so that the fastener can be expected to have a certain degree of waterproofing.

[0094] A single or multiple sliders 44 are attached to either one of the fastener portions 43. The other fastener portion 43 is set by inserting its end into the slider 44. In this embodiment, the slider 44 is attached to the side of another temporary rainproofing sheet 41(R) having a smaller width dimension. The slider 44 is set so as to wait at the start point of one end side (opening side) of the longitudinal direction 32 of the fastener portion 43. A handle 54 (Fig. 7) for manually moving the slider 44 is attached to the slider 44.

[0095] One end side of the temporary rain stopping member 31 refers to one of the short sides located on both sides in the longitudinal direction 32 of the temporary rain stopping member 31 (the opening side of the fastener portion 43), and either one may be used. One end side of at least one of the temporary rain stopping members 31 may be formed with one or more mounting holes 55 (through holes) as necessary. The mounting holes 55 are preferably reinforced by attaching eyelets.

[0096] A binding rope 56 may be attached to the mounting hole 55. The binding rope 56 is used to tie one end of the temporary rain stop member 31 in the spread and connected state to the adjacent building unit 1 (or the end of the roof beam 16, etc.), so that the one end of the temporary rain stop member 31 is prevented from being inadvertently turned up or flapping about.

[0097] The binding ropes 56 are attached in advance at the factory directly to the mounting holes 55 or to protective ring members 57 (Fig. 9(c)) attached to the mounting holes 55. The binding ropes 56 are temporarily secured to the temporary rain stop members 31 and the building units 1 as appropriate using masking tape similar to the temporary fastening parts 37. The binding ropes 56 are tied to the building units 1 when the temporary rain stop members 31 are spread out at the construction site (Fig. 7(b)), and are untied from the building units 1 when the temporary rain stop members 31 are removed. In this embodiment, the binding ropes 56 are tied to binding holes 21d provided at the ends of the roof frames 21 located on the outermost sides of each building unit 1.

[0098] The other end side of the temporary rain stopping member 31 refers to the other side (the closing side of the fastener portion 43) of the short sides located on both sides in the longitudinal direction 32 of the temporary rain stopping member 31, and is the side opposite to the one end side. As necessary, one or more mounting holes 55 may be formed in the other end side of at least one of the temporary rain stopping members 31, as described above. The mounting holes 55 are preferably reinforced by attaching eyelets.

[0099] A binding rope 56 may be attached to the mounting hole 55. The binding rope 56 ties the other end of the temporary rain stop member 31 in the spread and connected state to the adjacent building unit 1 (or the end of the roof beam 16, etc.), respectively, to prevent the other end of the temporary rain stop member 31 from accidentally turning up or flapping.

[0100] The binding ropes 56 are attached in advance at the factory directly to the mounting holes 55 or via protective ring members 57 (Fig. 9(c)) attached to the mounting holes 55. The binding ropes 56 are temporarily secured to the temporary rain stop members 31 and the building units 1 as appropriate using masking tape similar to the temporary fastening parts 37. The binding ropes 56 are tied to each building unit 1 when the temporary rain stop members 31 are spread out at the construction site (Fig. 7(b)), and are untied from each building unit 1 when the temporary rain stop members 31 are removed. In this embodiment, the binding ropes 56 are tied to binding holes 21d provided at the ends of each roof frame 21 located on the outermost sides of each building unit 1.

[0101] The mounting holes 55 on the short sides of the temporary rain stopping members 31 are preferably provided at a position approximately close to the middle between adjacent building units 1. For example, when the joints or seams between the temporary rain stopping members 31 are located at the middle position between adjacent building units 1, the mounting holes 55 are provided for each temporary rain stopping member 31. When the joints or seams between the temporary rain stopping members 31 are not located at the middle position between adjacent building units 1, the mounting holes 55 are provided together in a portion of one of the temporary rain stopping members 31 close to the above-mentioned middle position. The mounting holes 55 and binding ropes 56 can be provided on the short sides of the temporary rain stopping members 31 in the following embodiments as well.

[0102] The lead string 45 is a string-like member for manually operating the slider 44 set on the open side from the end position on the closed side, which is located on the opposite side. The lead string 45 is formed to have approximately the same length as the fastener portion 43.

[0103] One end of the lead string 45 is attached to the handle 54 of the slider 44, and is set together with the handle 54 so as to wait at one end side (open side) of the fastener part 43. The other end of the lead string 45 is set so as to wait at the other end side (closed side) of the fastener part 43.

[0104] The lead string 45 is stretched out almost straight and temporarily secured in the longitudinal direction 32 using masking tape similar to that used for the temporary fastening portion 37. The temporary fastening is performed appropriately on the portions within reach from both ends of the temporary rain stop member 31, (portions near both ends), to the temporary rain stop member 31 on the side where the slider 44 is provided, the building unit 1, the roof panel 7, etc. It is sufficient that the other end of the lead string 45 is temporarily secured at the very least (FIG. 4).

[0105] (1-3) Figure 11 shows a modification of this embodiment. The modification will be described below.

[0106] In the above, the temporary rainproofing member 31 may be a temporary rainproofing sheet 41. The temporary rainproof sheet 41 may have a magnet 58 or a hook-and-loop fastener portion 59 on the other side portion 36 . The magnets 58 or hook-and-loop fastener portions 59 may be arranged so that the magnets 58 or hook-and-loop fastener portions 59 are joined together by magnetic force or hook-and-loop fastener portions 59 by overlapping the other side portions 36 of the temporary rainproofing sheets 41 of a pair of adjacently installed building units 1.

[0107] Here, the temporary rainproof sheet 41 and other elements are the same as those in the above embodiment.

[0108] The overlapping of the other side portion 36 of the temporary rainproofing sheet 41(R) with the other side portion 36 of another temporary rainproofing sheet 41(L) means that when both temporary rainproofing sheets 41 are spread over the non-waterproof zone 9, the other side portions 36 are doubled up to a required width over the entire area in the longitudinal direction 32 (overlapped portion). The overlapping space between the other side portions 36 forming the overlapping portion may be large enough to at least cover and hide connectors such as the magnets 58 and the hook-and-loop fastener portion 59, and to prevent rainwater from entering through the gap.

[0109] In this embodiment, at the height difference on the right side, another temporary rain stopping sheet 41(R) having a smaller width is placed from above over the other side portion 36 of the temporary rain stopping sheet 41(L) having a larger width. As a result, the other side portion 36 of the other temporary rain stopping sheet 41(R) facing downward is exposed to the front, and the other side portion 36 of the temporary rain stopping sheet 41(L) having a larger width is hidden to the rear. The other side portions 36 are then overlapped continuously in the longitudinal direction 32 by a required amount (overlap). This prevents rainwater from entering through the overlapping portion.

[0110] When the other side portions 36 of the temporary rain stopper member 31 having the overlapping portion 53 on one side portion 33 are overlapped with each other, the overlapping portion 53 may have a width large enough to cover the mounting portion 35.

[0111] Magnet 58 is a material that has the property of attracting (adsorbing and fixing) metal such as iron by magnetic force. Magnet 58 is installed as a connector along longitudinal direction 32 on at least one of the overlapping portions of other side portions 36 of temporary rainproofing sheet 41. Note that magnet 58 can be provided on both other side portions 36, but, for example, magnet 58 may be provided only on one other side portion 36, and a metal piece or fitting such as iron that attracts magnet 58 may be attached to the other other side portion 36.

[0112] In this case, it is preferable to provide the magnet 58 on the other side 36 of the other temporary rainproofing sheet 41(R) that will be placed over the sheet from above, in order to improve ease of handling. Of course, the magnet 58 may be provided on the other side 36 of the temporary rainproofing sheet 41(L). The magnet 58 and the metal pieces are provided continuously or discontinuously in the longitudinal direction 32 along the other side 36 of the temporary rainproofing sheet 41 and the other side 36 of the other temporary rainproofing sheet 41(R). Since the magnet 58 and the metal pieces only need to correspond one-to-one, when they are provided discontinuously, it is structurally possible to provide the magnet 58 and the metal pieces alternately or in some places with the magnets reversed.

[0113] The hook-and-loop fastener portion 59 is a flexible hook-and-loop fastening member for directly attaching surfaces together by hooking force. There are two types of hook-and-loop fastener portion 59: a first ribbon tape having many loop portions on its surface, and a second ribbon tape having many hook portions on its surface. The hook-and-loop fastener as a connector is formed by combining the first ribbon tape and the second ribbon tape in a one-to-one relationship.

[0114] The first and second ribbon tapes are placed so that their surfaces meet and many of the hook portions are hooked onto many of the loop portions. That is, the first ribbon tape is attached to one side of the overlapping portion between the opposing surfaces of the other side portions 36 of the temporary rainproofing sheet 41 so that the loop portions face the opposing surface. The second ribbon tape is attached to the other side between the opposing surfaces so that the hook portions face the loop portions of the first ribbon tape.

[0115] It is sufficient to provide either the magnet 58 or the hook-and-loop fastener 59, but it is structurally possible to provide both at the same time. It is also structurally possible to provide one or both of these in combination with the fastener 43.

[0116] Also, in addition to connectors such as magnets 58 and hook-and-loop fasteners 59, connectors such as fittings 60 may be used to connect the overlapping portions of the other side portions 36 together. Fittings 60 are fittings that can connect the overlapping portions together by fitting or snapping, such as hooks and snap buttons. Fittings 60 may be of any type.

[0117] <Function> The function of this embodiment will now be described.

[0118] The building units 1 prefabricated in a factory are transported to a construction site and assembled at the construction site to construct a unit building.

[0119] In a unit building, waterproofing (temporary rainproofing) is performed as necessary to prevent rainwater from entering the inside of the building unit 1 during the period from the shipping of the building unit 1 from the factory and the transportation to the construction site until the completion of the unit building. For this purpose, for example, when it rains, the top of the building unit 1 is covered with a waterproof sheet large enough to cover the entire upper surface 2 of the building unit 1, but this is inefficient because the waterproof sheet becomes large and it takes time and effort to handle the waterproof sheet. In addition, if the entire upper surface 2 of the building unit 1 is covered with a waterproof sheet, it will be difficult to lift the building unit 1, so the building unit 1 transported to the construction site is not directly placed on the foundation but is temporarily placed on the site.

[0120] Therefore, in this embodiment, a waterproof roof panel 7 is attached to at least the center of the upper surface 2 of the building unit 1 installed on the top floor. As a result, most of the roof is installed in advance on the building unit 1 at the factory, and the roof panel 7 makes most of the upper surface 2 of the building unit 1 a waterproof zone 8.

[0121] In this case, a non-waterproof zone 9 remains around the upper edge 11 of the building unit 1 where the roof panel 7 cannot be installed in order to attach the hanging fittings 4 to the building unit 1. Although a small non-waterproof zone 9 is created in this way, the non-waterproof zone 9 is kept small, so the building unit 1 itself has a structure that is relatively resistant to rain. Furthermore, by leaving the non-waterproof zone 9, the building unit 1 can be hoisted by attaching the hanging fittings 4 to it at any time, eliminating the need to temporarily place the building unit 1 on the site until the rain stops.

[0122] For the non-waterproof zone 9, temporary rainproofing is performed using a small temporary rainproofing member 31 depending on the weather and other conditions. Therefore, the size of the temporary rainproofing member 31 is kept to a minimum, making it easy to handle and enabling efficient temporary rainproofing.

[0123] Specifically, in order to cope with rainy weather, temporary rainproofing members 31 for covering the non-waterproof zone 9 are attached to the building unit 1 in advance during the manufacturing process of the building unit 1 at the factory. Since the building unit 1 is manufactured as a product with the temporary rainproofing members 31 attached in advance, for example, when the building unit 1 is shipped from the factory, it is possible to eliminate the need for a shipping person or a transporter to perform rainproofing on a building unit 1 that does not have the temporary rainproofing members 31.

[0124] For example, in full rain, the temporary rainstop members 31 may be installed in a use state in which the non-waterproof zone 9 is covered in advance and temporary rainstopping has been completed for the building unit 1. In other cases, the temporary rainstop members 31 may be bundled up small and temporarily fastened to the building unit 1 by the temporary fastening parts 37 in a standby state. Examples of other cases include when it is not yet raining but rain is expected during construction, when it is necessary to prepare for unexpected rain, and when temporary rainstopping is always performed regardless of rain or shine for process management purposes. In this case, the building unit 1 is transported to the construction site with the temporary rainstop members 31 in a temporarily fastened state.

[0125] Then, at the construction site, the building units 1 are installed on the foundation, and the building body is constructed appropriately by stacking the building units 1 on top of the building units 1. In the building body after the installation work of the building units 1 is completed, the roof panel 7 and the temporary rainproofing member 31 are already attached to the building unit 1 on the top floor.

[0126] In a building unit 1 installed on the top floor, the temporary weatherproofing material 31 installed in advance in the non-waterproof zone 9 may or may not have been temporarily waterproofed yet.

[0127] If temporary waterproofing has not been completed, i.e., if the temporary waterproofing members 31 are bundled together and temporarily fastened with the temporary fastening parts 37, immediately after construction of the main body of the building, the temporary fastening parts 37 are removed from the building unit 1 on the top floor, the temporary waterproofing members 31 are spread out, and the temporary waterproofing members 31 cover the non-waterproof zone 9. The temporary waterproofing members 31 can be spread into the non-waterproof zone 9 quickly and easily by simply removing the temporary fastening parts 37.

[0128] As described above, the temporary rainproofing members 31 can be easily and reliably installed on the non-waterproof zone 9 on the top surface 2 of the building unit 1 at the construction site, enabling temporary rainproofing of the building unit 1 while reducing the labor and time required to attach the temporary rainproofing members 31 to the building unit 1 from scratch at the construction site. This makes it possible to eliminate or significantly reduce the labor required for temporary rainproofing at the site. Moreover, if the temporary rainproofing members 31 are flexible and can be deformed by bundling or spreading them out, then even if the temporary rainproofing members 31 are spread out, they will not prevent the building unit 1 from being hoisted by attaching the hanging hardware 4 to it.

[0129] Furthermore, when the temporary rainproofing member 31 has completed its use as a temporary rainproofing member, it can be easily removed from the building unit 1 by detaching the mounting portion 35 on one side portion 33. The removed temporary rainproofing member 31 can be recovered and reused in a new building unit 1 being manufactured in the factory. The temporary rainproofing member 31 is small enough to cover only a small non-waterproof zone 9, so it does not require much effort to recover it. The above-mentioned operation is almost the same in all the embodiments.

[0130] In this embodiment, a temporary rainproofing sheet 41 is used as the temporary rainproofing member 31. The temporary rainproofing sheet 41 is attached at the factory to the periphery of one side 33 of the temporary rainproofing sheet 41 at the boundary 34 between the waterproof zone 8 and the non-waterproof zone 9 (the outermost roof frame 21 located at the boundary 34) with a mounting part 35 such as a drill screw. This allows the temporary rainproofing sheet 41 to be installed on the building unit 1 easily and reliably.

[0131] Then, as necessary, the other side 36 or its periphery of the temporary rainproofing sheet 41 is temporarily fastened to the building unit 1 by the temporary fastening parts 37. For example, the temporary rainproofing member 31 is placed in a standby state folded back toward the waterproof zone 8 side, and both end portions in the longitudinal direction 32 of the other side 36 are attached in the longitudinal direction 32 to the upper surface of the roof panel 7 along the other side 36 by the temporary fastening parts 37 (curing tape). Also, for example, the other side 36 of the temporary rainproofing member 31 may be rolled up and both end portions, etc., attached to the side surface of the outermost roof frame 21, etc. by the temporary fastening parts 37 (curing tape).

[0132] In this way, when both ends of the temporary rainproofing sheet 41 are temporarily fixed, the temporary fixing parts 37 (masking tape) can be easily and reliably removed from both ends of the temporary rainproofing sheet 41 at the construction site without climbing onto the roof. This makes it possible to eliminate the need to climb onto the roof in rainy weather to perform temporary rainproofing work at high altitudes.

[0133] Furthermore, the temporary rain stopping sheet 41(L) and another temporary rain stopping sheet 41(R) spread over the non-waterproof zones 9 of adjacent building units 1 can be connected together and used as one unit. The temporary rain stopping sheet 41(L) and the other temporary rain stopping sheet 41(R) are connected by a fastener (fastener portion 43) provided on the other side portion 36 or its periphery, a magnet 58, a hook-and-loop fastener (hook-and-loop fastener portion 59), a fitting 60, or other connector.

[0134] When the connector is a fastener, the other side portions 36 of the spread out temporary rainproofing sheets 41 are butted together at one end side in the longitudinal direction 32 of the temporary rainproofing sheets 41, and an end portion of the fastener portion 43 is inserted into the slider 44. Then, the lead string 45 is pulled from the other end side in the longitudinal direction 32 to slide the slider 44 along the fastener portion 43 to the other end side. This sliding of the slider 44 causes the teeth of the slider 44 to mesh with each other, closing the fastener portion 43, and the temporary rainproofing sheet 41(L) and another temporary rainproofing sheet 41(R) are integrated by the fastener portion 43 in a short time.

[0135] Also, when the connector is a magnet 58 or a hook-and-loop fastener (hook-and-loop fastener portion 59), for example, the temporary rainproofing sheet 41(L) with the larger width is first spread out to cover both non-waterproof zones 9, and the other side portion 36 is held taut at a predetermined position. Then, another temporary rainproofing sheet 41(R) is spread out later, and the other side portion 36 of the temporary rainproofing sheet 41(L) is covered with the other side portion 36 of the other temporary rainproofing sheet 41(R) and overlapped. As a result, the magnets 58 or hook-and-loop fastener portions 59 provided at the overlapping portions are brought close to each other, and the magnetic force of the magnets 58 or the hook-and-loop fastener portion 59 act to naturally stick to each other. The temporary rainproofing sheet 41(L) and the other temporary rainproofing sheet 41(R) are integrated at the overlapping portion of the other side portions 36 by connecting the magnets 58 and the hook-and-loop fastener portion 59, thereby preventing rainwater from entering through the overlapping portion. Note that the fittings 60 require manual fitting. The rest are the same as the magnets 58 and the hook-and-loop fastener portion 59.

[0136] As a result, the temporary rainproof sheet 41(L) and the other temporary rainproof sheet 41(R) can be easily and reliably connected by the connector. The two adjacent non-waterproof zones 9 of the adjacent building units 1 are simultaneously and reliably covered and waterproofed by the connected temporary rainproof sheet 41(L) and the other temporary rainproof sheet 41(R). This prevents rainwater from entering each building unit 1 or the gap 65 between the building units 1 from between the temporary rainproof sheet 41(L) and the other temporary rainproof sheet 41(R), thereby suppressing the effects of rainfall. In addition, the temporary rainproof sheet 41 of this embodiment is configured to efficiently cover the relatively small non-waterproof zone 9 with the small temporary rainproof sheet 41, so that installation work of the building units 1 at the construction site during rainy weather is not hindered.

[0137] <Effects> According to this embodiment, the following effects can be obtained.

[0138] (Effect 1-1) The rainproofing structure of a unit building may include a building unit 1 having a waterproof zone 8 in the center of the top surface 2, with the outside of the waterproof zone 8 being a long and narrow non-waterproof zone 9 that follows the waterproof zone 8, and a rainproofing member 31 that is installed in the non-waterproof zone 9. With this, even if a part of the top surface 2 of the building unit 1 (around the upper edge 11) must be made into a non-waterproof zone 9 in order to attach the hanging bracket 4, it is sufficient to rainproof only a small part of the non-waterproof zone 9 with the rainproofing member 31. And, by attaching the rainproofing member 31 to the building unit 1 in advance at the factory, the non-waterproof zone 9 can be rainproofed easily and reliably in a short time at the construction site with little effort using the rainproofing member 31.

[0139] Furthermore, by attaching the temporary rain stop members 31 to the building unit 1 in advance, there is no need to climb onto the unit building (roof) and work at a height to install the temporary rain stop members 31 over the entire surface of the upper surface 2 of the building unit 1. Also, temporary rain stop can be performed simply by spreading out the small temporary rain stop members 31 from the scaffolding position. Therefore, the unit building itself is provided with a highly convenient temporary rain stop structure.

[0140] The temporary rain stopping member 31 may be elongated along the non-waterproof zone 9. This eliminates the need for the temporary rain stopping member 31 to be large enough to cover the entire surface of the upper surface 2 of the building unit 1. As a result, the temporary rain stopping member 31 becomes an easy-to-handle member having a surface of the minimum necessary size and shape, and the elongated surface of the temporary rain stopping member 31 can efficiently provide temporary rain stopping for the entire non-waterproof zone 9 at once.

[0141] The temporary rain stopping member 31 may be attached detachably to the boundary portion 34 of the waterproof zone 8 with the non-waterproof zone 9 by the attachment portion 35 at the periphery of one side portion 33 along the longitudinal direction 32. As described above, the temporary rain stopping member 31 can be attached without affecting the waterproof zone 8, and the non-waterproof zone 9 can be reliably waterproofed by the temporary rain stopping member 31. Furthermore, as described above, the temporary rain stopping member 31 can be easily removed and collected from the boundary portion 34 after the temporary rain stopping, and the waterproof zone 8 is not affected even after removal. Furthermore, as described above, for example, it is possible to attach the temporary rain stopping member 31 to the outermost roof panel 7 constituting the waterproof zone 8, and then install the roof panel 7 together with the temporary rain stopping member 31 to the building unit 1. Therefore, it becomes easy to manufacture the building unit 1 equipped with the temporary rain stopping member 31 in the factory, and to attach the temporary rain stopping member 31 to the building unit 1.

[0142] The other side portion 36 of the temporary rainstop member 31 along the longitudinal direction 32 may be deformed from a state in which it is temporarily fixed to the upper portion of the building unit 1 by the temporary fastening portion 37 to a state in which it covers the non-waterproof zone 9. As described above, the temporary rainstop member 31 can be attached to the building unit 1 in a small, temporarily fixed state when the building unit 1 is manufactured at a factory. Therefore, the temporary rainstop member 31 can be installed on the building unit 1 so as not to get in the way when the building unit 1 is manufactured, transported, installed, etc. Furthermore, when the building unit 1 is installed at a construction site, the temporary rainstop member 31 can be easily expanded on the spot by simply removing the temporary fastening portion 37, and the temporary rainstop member 31 can cover the non-waterproof zone 9.

[0143] (Effect 1-2) In the temporary rainproofing structure of the unit building, the temporary rainproofing member 31 may be a temporary rainproofing sheet 41. This allows the building unit 1 to perform temporary rainproofing by utilizing the high waterproofing properties of the temporary rainproofing sheet 41, and the temporary rainproofing sheet 41 can be easily folded or rolled up to make it small, or conversely, expanded to make it large. In addition, the temporary rainproofing sheet 41 is highly versatile, inexpensive, and easy to obtain, making it convenient.

[0144] The temporary rainproofing sheet 41 may have a fastener portion 43 as a connector on the other side portion 36. The fastener portion 43 may be connected to another fastener portion 43 on the other side portion 36 of another temporary rainproofing sheet 41(R) attached as a temporary rainproofing member 31 to an adjacently installed building unit 1(R). This allows the other side portions 36 of the temporary rainproofing sheets 41 of adjacent building units 1 to be easily and reliably connected to each other by the fastener portion 43, and used as a large integrated unit. Furthermore, this integration makes it possible to prevent rainwater from entering between the temporary rainproofing sheet 41(L) and the other temporary rainproofing sheet 41(R) and into the gap 65 between the building units 1.

[0145] A lead string 45 extending from one end (starting point) of the temporary rainproofing member 31 or the fastener portion 43 in the longitudinal direction 32 to the other end (ending point) may be attached to the slider 44. This allows the ends of the fastener portion 43 of the temporary rainproofing sheet 41 to be inserted into the slider 44 at one end of the temporary rainproofing sheet 41, and the fastener portion 43 to be easily and reliably closed by pulling the lead string 45 from the other end. This makes it possible to close the fastener portion 43 by working only from both ends of the temporary rainproofing sheet 41, without climbing onto the building unit 1 (roof). When removing (opening) the fastener portion 43, it is easy to do so by simply sliding the slider 44 from the other end to one end in the longitudinal direction 32 in the opposite manner to the above. In particular, the fastener portion 43 can be easily removed by performing the above operation after removing the temporary rainproofing sheet 41 from the building unit 1.

[0146] (Effect 1-3) In a modified example of the temporary rainproofing structure of the unit building, the temporary rainproofing member 31 may be a temporary rainproofing sheet 41. This makes it possible to obtain the same effects as those described above.

[0147] The temporary rainproofing sheet 41 may have a magnet 58 or a hook-and-loop fastener part 59 on the other side part 36. The magnet 58 or hook-and-loop fastener part 59 may be configured to connect the magnets 58 or hook-and-loop fastener parts 59 to each other by overlapping the other side parts 36 of the temporary rainproofing sheets 41 of a pair of adjacently installed building units 1. This allows the temporary rainproofing sheets 41 to be easily and reliably connected and integrated by a connector such as the magnet 58 or hook-and-loop fastener part 59 by simply spreading out the temporary rainproofing sheets 41 of the adjacent building units 1 and overlapping the other side parts 36 of the temporary rainproofing sheets 41 to each other. The integration can prevent rainwater from entering between the building units 1 from between the temporary rainproofing sheet 41(L) and another temporary rainproofing sheet 41(R).

[0148] The magnet 58 and hook-and-loop fastener part 59 are naturally attached by the magnetic force and hooking force when they are simply overlapped or when they are overlapped and a force equivalent to their own weight is applied, so no special effort is required for joining. The magnet 58 or hook-and-loop fastener part 59 can be easily removed by simply applying an external force to forcibly pull them apart. In addition to the magnet 58 and hook-and-loop fastener part 59, a connector such as a fitting 60 can be used for the overlapping part. EXAMPLES

[0149] <Configuration> The configuration of this embodiment will now be described.

[0150] 12 to 16 show this embodiment.

[0151] A temporary rainproofing structure for a unit building similar to the above embodiment, The temporary rainproofing member 31 may be a water drainage sheet 61. The drainage sheet 61 may have a width dimension 62 (FIG. 15) such that at least the other side 36 reaches the adjacent building unit 1 installed thereto. The water-repellent sheet 61 may be laid across a pair of building units 1 to cover one or both of the non-waterproof zones 9 between the pair of building units 1.

[0152] Here, the water-repelling sheet 61 is a planar temporary rain-proofing member 31 similar to the temporary rain-proofing sheet 41. The water-repelling sheet 61 is a thinner sheet than the temporary rain-proofing sheet 41. The water-repelling sheet 61 is a thin, light and flexible architectural sheet (membrane member) made of, for example, polyethylene film and has waterproofing properties and is used, for example, on the inside of an exterior wall 63 (FIG. 16) to waterproof the outer periphery of a building. This water-repelling sheet 61 is used as the temporary rain-proofing member 31 in the parts other than the inside of the exterior wall 63. The water-repelling sheet 61 is suitable for being left on the building unit 1 after use.

[0153] The drainage sheet 61 is preferably a single elongated member having a substantially rectangular shape in plan view and having a dimension (length) in the longitudinal direction 32 that is substantially the same as that of the non-waterproof zone 9. The drainage sheet 61 can be provided in one or both of the one building unit 1(L) and the other building unit 1(R).

[0154] The water-repellent sheet 61 is fixed by an attachment portion 35 to one side portion 33 and the upper portion of the outer roof frame 21 facing the non-waterproof zone 9 (the upper portion of the horizontal flange 23c of the underlying steel plate 23, or between the upper flange 21b of the roof frame 21 and the horizontal flange 23c of the underlying steel plate 23).

[0155] The mounting portion 35 may be a fastener 35a (drill screw) similar to the above embodiment, but may also be an adhesive layer 35b (FIG. 12) formed along the longitudinal direction 32 on the underside of one side portion 33 of the drainage sheet 61. The adhesive layer 35b is formed along one side portion 33 of the drainage sheet 61 with a width and length substantially equal to that of the upper portion of the outer roof frame 21. The adhesive layer 35b may be formed, for example, from double-sided tape. A release paper may be attached to the adhesive layer 35b, and the release paper may be peeled off so that the adhesive layer 35b can be easily attached and fixed directly to the upper portion of the outer roof frame 21.

[0156] The adhesive strength of the adhesive layer 35b is set to a strength that does not easily peel off when the drainage sheet 61 is left on the building unit 1 in its original state even after the temporary rainproofing. In cases where the drainage sheet 61 is not left on the building unit 1, the adhesive can be made strong enough to be able to be peeled off and reapplied when necessary while still being able to maintain its affixed state like masking tape.

[0157] The drainage sheet 61, one side portion 33 of which is attached to the outer roof frame 21, may be set in a use state (FIG. 16) in which the other side portion 36 is hung along the side of the building unit 1 in the factory during rainy weather, etc. The drainage sheet 61 may be extended to a length (width dimension) such that the other side portion 36 reaches the bottom of the building unit 1, so that the entire side of the building unit 1 can be temporarily waterproofed. In this case, the lower end portion (other end portion 36) of the drainage sheet 61 may be secured to the bottom of the side of the building unit 1 with an adhesive layer 75 or masking tape. When it is not raining, the drainage sheet 61 may be temporarily secured in a standby state (FIG. 13) in which the lower surface is rolled up so as to be exposed, as in the above embodiment. The temporary fastening is performed, for example, by attaching the rolled part (rolled portion) and the surrounding unrolled part to the outside of the side (web portion 21a) of the outer roof frame 21 with a temporary fastening portion 37 (masking tape).

[0158] The drainage sheet 61 of this embodiment has a width 62 large enough to at least reach the adjacent upper edge 11 of the adjacently installed building unit 1 (width 62 slightly larger than the width of the non-waterproof zone 9). As a result, the other side 36 of the drainage sheet 61 is large enough to span the gap 65 between the non-waterproof zone 9 and the adjacent building unit 1. In this case, it is preferable to provide another similar drainage sheet 61(R) on the side of the adjacent building unit 1(R).

[0159] Preferably, the width 62 of the drainage sheet 61 is large enough to reach the upper surface of the roof panel 7 provided on the adjacently installed building unit 1 and overlap with the upper surface of the roof panel 7 (width 62 slightly larger than twice the width of the non-waterproof zone 9). As a result, the other side 36 of the drainage sheet 61 is large enough to extend beyond the adjacent non-waterproof zone 9 of the adjacent building unit 1 and span between two consecutive non-waterproof zones 9. In this case, a similar separate drainage sheet 61(R) may or may not be provided on the side of the adjacent building unit 1(R).

[0160] When the other side 36 of the drainage sheet 61 is spread out, it can be secured from above to, for example, the upper edge 11 of the adjacent building unit 1 or the upper surface of the roof panel 7 with masking tape similar to that of the temporary fastening portion 37. Alternatively, an adhesive layer 35b or release paper similar to that of the one side 33 may be provided in advance on the underside of the periphery of both ends in the longitudinal direction 32 of the other side 36 of the drainage sheet 61. Then, the other side 36 is attached to the upper edge 11 of the adjacent building unit 1 or the upper surface of the roof panel 7 with the adhesive layer 35b.

[0161] Alternatively, a fastener portion 43, or a connector such as a magnet 58, a hook-and-loop fastener portion 59 or a fitting 60 may be attached to the other side portion 36 of the drainage sheet 61, as in the above embodiment.

[0162] The drainage sheet 61 can be removed after use, but if it is to be left in place, it may be arranged, for example, to cover the non-waterproof zone 9 on one side and have the other side 36 hang down into the gap 65 between adjacent building units 1 (e.g., Figure 2).

[0163] Since the water-repellent sheet 61 is thinner than the temporary rainproofing sheet 41, it is preferable to reinforce at least the portion that comes into contact with the sheathing board support beams 52 with reinforcing tape 66 (FIG. 13(b)) or the like.

[0164] As shown in the modified example of Fig. 16, the drainage sheet 61 may be installed not only between adjacent building units 1 but also at the position of the non-waterproof zone 9 outside the outermost building unit 1 of the building. In this case, there are no adjacent building units 1, and an exterior wall 63 (exterior wall panel, etc.) is provided on the outermost building unit 1. Thus, the drainage sheet 61 is installed so that it hangs down along the upper part of the exterior wall 63 (exterior wall panel, etc.) of the outermost building unit 1, with the other side 36 having a length (width dimension) that reaches the upper part of the exterior wall 63. In this way, the drainage sheet 61 can cover the non-waterproof zone 9 of the building unit 1 and the upper part of the exterior wall 63 to provide temporary rainproofing, etc.

[0165] The drainage sheet 61 of this modified example may be removed after the temporary rainproofing, but even if it is left in place, there is no problem when gutters or the like are installed at the upper position of the exterior wall 63 of the building unit 1, because it is hidden from above by a cover member (for example, a girder cover member) for attaching the gutters. In the figure, the drainage sheet 61 is installed so as to cover the top of the support beam 67 for attaching a cover member to the building unit 1.

[0166] Furthermore, the drainage sheet 61 can be used alone as the temporary rain stopping member 31, but as another modified example, as shown in Example 1 (FIGS. 2 and 3), it can be used in combination with the temporary rain stopping sheet 41 of Example 1 to double the temporary rain stopping member 31. When used in combination, it is preferable to install the drainage sheet 61 below the temporary rain stopping sheet 41 so that the temporary rain stopping sheet 41 becomes the first stage temporary rain stopping member 31 and the drainage sheet 61 becomes the next stage temporary rain stopping member 31.

[0167] In this case, the drainage sheet 61 may be in a rolled-up standby state with the other side portion 36 depending on weather and other conditions, as in the above embodiment, and temporarily secured by the temporary fastening portion 37. The drainage sheet 61 may also be installed so that the other side portion 36 hangs down to the upper or lower side surface of the building unit 1, and secured to the upper or lower side surface of the building unit 1 by the temporary fastening portion 37.

[0168] <Function> The function of this embodiment will now be described.

[0169] In this embodiment, one side 33 of the drainage sheet 61 is attached to the building unit 1 in a factory according to weather conditions and other conditions to form a temporary rainproofing member 31. The drainage sheet 61 with the one side 33 attached may be rolled up in a standby state and temporarily fixed to the building unit 1, or may be stretched out in a use state and hung down along the upper part of the outer surface (exterior wall 63 panel, etc.) of the building unit 1. The other side 36 of the drainage sheet 61 hung down may be fastened to the upper or lower side of the building unit 1. When the drainage sheet 61 is hung down, the temporary rainproofing for the non-waterproof zone 9 is completed in the factory. This makes it possible to transport the building unit 1 to a construction site in rainy weather.

[0170] In the case where the drainage sheet 61 is rolled up and temporarily fixed, the temporary fixing is removed at the construction site, the drainage sheet 61 is unfolded, and the other side 36 is laid across the adjacent building unit 1 and fixed to the adjacent building unit 1 with masking tape or the like. The drainage sheet 61 does not need to be fully unfolded for use, and may be used in a state where a part of it is left rolled up and the length is adjusted. In the case where the other side 36 of the drainage sheet 61 is hung down in advance, it can be fixed to the adjacent building unit 1 in the same manner. The fixing position of the other side 36 of the drainage sheet 61 can be, for example, the end of the non-waterproof zone 9 of the adjacent building unit 1. As a result, at least the gap 65 between the non-waterproof zone 9 of the building unit 1 to which the drainage sheet 61 is attached and the adjacent building unit 1 is temporarily waterproofed by the drainage sheet 61.

[0171] Furthermore, for example, if the other side 36 of the drainage sheet 61 is made to have a width dimension 62 that reaches the upper surface of the roof panel 7 (waterproof zone 8) of the adjacent building unit 1, the other side 36 is fixed to the upper surface of the roof panel 7 of the adjacent building unit 1. This allows the drainage sheet 61 to simultaneously cover both of the two adjacent non-waterproof zones 9 of a pair of adjacent building units 1. Therefore, the two adjacent non-waterproof zones 9 are temporarily waterproofed at once.

[0172] After the drainage sheet 61 has served its purpose as a temporary rainproofing, it may be left on the building unit 1 and used for waterproofing the building, or it may be removed and collected. If it is left on the building unit 1, the drainage sheet 61 may be used in the same position, or it may be used by changing its position.

[0173] <Effects> According to this embodiment, the following effects can be obtained.

[0174] In the temporary rainproofing structure of the unit building, the temporary rainproofing member 31 may be a water-repelling sheet 61. The water-repelling sheet 61 is a thin, light and flexible architectural sheet (membrane member) that has sufficient waterproofing properties and can be folded or rolled up to make it small or spread out to make it large. Therefore, the water-repelling sheet 61 can also be suitably used for temporary rainproofing in the non-waterproof zone 9. Since the water-repelling sheet 61 is a material that is normally used as a waterproofing material for buildings, there is no need to prepare a special temporary rainproofing member 31 for temporary rainproofing. In addition, after temporary rainproofing, it is also possible to leave it as it is and use it for waterproofing the building unit 1.

[0175] The drainage sheet 61 may have a width dimension 62 such that at least the other side portion 36 reaches the adjacently installed building unit 1. In this way, by bridging the expanded drainage sheet 61 between a pair of adjacent building units 1 and fixing the other side portion 36 to the adjacent building unit 1, the non-waterproof zone 9 of the building unit 1 can be securely covered with the drainage sheet 61 to provide a temporary rainproofing. In addition, by covering the space between the pair of building units 1, the above can prevent rainwater from entering the gap 65 between the building units 1.

[0176] The expanded drainage sheet 61 can also be secured across the two non-waterproof zones 9 of a pair of adjacent building units 1 to the opposite waterproof zone 8 (roof panel 7). This allows the drainage sheet 61 to simultaneously cover both of the two adjacent non-waterproof zones 9 of a pair of building units 1, providing temporary rain protection at one time. EXAMPLES

[0177] <Configuration> The configuration of this embodiment will now be described.

[0178] 17 to 22 show this embodiment.

[0179] (3-1) The temporary rainproofing structure of a unit building includes a building unit 1 having a waterproof zone 8 in the center of the upper surface 2, and an elongated non-waterproof zone 9 on the outside of the waterproof zone 8 along the waterproof zone 8; A temporary rainproofing member 31 provided in the non-waterproof zone 9 may also be provided. The temporary rainproofing member 31 may be a beam-like member 71 extending in an elongated manner along the non-waterproof zone 9, and a water-repellent sheet 61 sealing the gap between the beam-like member 71 and the waterproof zone 8. The beam-shaped member 71 may have a lower portion which is detachably attached to the non-waterproof zone 9 of the building unit 1 by the mounting portion 35, and may have a flange portion 72 at its upper portion which extends toward the non-waterproof zone 9. Furthermore, a temporary inter-unit rainproof cover 73 (Figure 18) having a downward C-shaped cross section may be fitted in an enveloping state between the flange portions 72 of the beam-like members 71 attached to a pair of adjacently installed building units 1 so as to cover the joint portion 74 between the flange portions 72 from above.

[0180] Here, the building unit 1 and the like are similar to those in the above-mentioned embodiments.

[0181] The beam-like member 71 is a long and narrow horizontal member extending along the longitudinal direction 32 of the non-waterproof zone 9. The beam-like member 71 is a metal member having a substantially uniform cross section.

[0182] Although the beam-like member 71 may be a closed cross-section member with no open surface, the beam-like member 71 in this embodiment is a member (open cross-section member) with an open surface and an approximately outward C-shaped cross-section, as shown in Fig. 19. The beam-like member 71 with an approximately outward C-shaped cross-section has a web portion 71a extending vertically, and an upper flange 71b and a lower flange 71c extending horizontally from the upper and lower ends of the web portion 71a toward the side opposite the waterproof zone 8 (the outside of the building unit 1).

[0183] The beam-like member 71 is installed in the non-waterproof zone 9 (at the position of the upper edge 11 which is the end of the non-waterproof zone 9) with the open surface formed between the tip of the upper flange 71b and the tip of the lower flange 71c open to the outside of the building unit 1. The beam-like member 71 can be formed by bending a single metal plate.

[0184] The beam-like members 71 and the drainage sheet 61 are attached to the building unit 1 in advance at a factory in the same manner as in the above embodiment, depending on the weather and other conditions. The beam-like members 71 and the like are then transported to the construction site together with the building unit 1, and are removed from the building unit 1 at an appropriate timing after the building unit 1 is installed and before the roof finishing work is completed, when there is no longer any possibility of rain. The removed beam-like members 71 are collected and brought back to the factory, and are reused in another building unit 1 under construction when it rains, etc.

[0185] As shown in Figure 17, the drainage sheet 61 is a single, thin, flexible sheet (membrane-like member or film-like member) made of the same material as those in the above embodiments, having approximately the same length in the longitudinal direction 32 and a substantially rectangular shape when viewed from above.

[0186] One side 33 of the drainage sheet 61 is attached to the boundary portion 34 in the same manner as in the above embodiment. The other side 36 of the drainage sheet 61 has a width dimension that reaches the position of the upper part of the beam-like member 71 (above the upper flange 71b) or the base of the flange portion 72. The other side 36 is held or fixed in contact with the upper part of the beam-like member 71 (upper flange 71b) or the base of the flange portion 72. The drainage sheet 61 is installed in a nearly horizontal state so as to cover almost the entire non-waterproof zone 9 from above.

[0187] The other side 36 of the drainage sheet 61 can be fixed to the upper part of the beam member 71 or the base of the flange portion 72 by means of an adhesive layer 75 similar to the adhesive layer 35b described above. The adhesive strength of the adhesive layer 75 is, for example, similar to that of masking tape. It is structurally possible to use a material similar to the temporary rainproofing sheet 41 of the above embodiment in place of the drainage sheet 61. Other points are the same as those of the above embodiments.

[0188] In addition, a second draining sheet 76 may be selectively attached to the beam member 71 having a substantially outward C-shaped cross section so as to close the open surface of the beam member 71 depending on the weather and other conditions. This second draining sheet 76 is made of the same material as the draining sheet 61 and has substantially the same length in the longitudinal direction 32, and its upper end is attached in advance at the factory to the upper surface of the flange portion 72 or the outer surface of the base of the flange portion 72. The second draining sheet 76 can be attached to the upper surface of the flange portion 72 by pasting with the adhesive layer 75 as described above. Note that it is structurally possible to use a material similar to the temporary rainproofing sheet 41 of the above embodiment instead of the second draining sheet 76.

[0189] This second draining sheet 76 is installed in a factory so as to hang down along the upper part of the outer surface of the building unit 1, and is installed at the construction site so as to enter the gap 65 between the building units 1. The lower end of the second draining sheet 76 may be secured to the upper part of the side of the building unit 1 with an adhesive layer 75 or masking tape. Note that, before the temporary rainproofing, the second draining sheet 76 may be in a rolled-up standby state and temporarily secured to the beam-like member 71 with masking tape, as in the above embodiment. Note that the second draining sheet 76 can be extended to a length (width dimension) such that the lower end reaches the lower part of the building unit 1, thereby temporarily sealing the entire side of the building unit 1. In this case, the lower end of the second draining sheet 76 may be secured to the lower part of the side of the building unit 1 with an adhesive layer 75 or masking tape.

[0190] The lower part (lower flange 71c) of the beam-like member 71 extends in the longitudinal direction 32 along the roof beam 16 that forms the upper edge 11 of the upper surface 2 of the building unit 1, and is installed so as to abut from above against the upper part of the roof beam 16 (almost directly above).

[0191] The mounting portion 35 is a portion or member that mounts the lower portion of the beam-like member 71 to the position of the non-waterproof zone 9. In this embodiment, a fastener 35a such as a drill screw is used for the mounting portion 35. A pilot hole 38 (through hole) may be pre-drilled at the position that will become the mounting portion 35 at the lower portion of the beam-like member 71, where the fastener 35a will be attached. The lower portion (lower flange 71c) of the beam-like member 71 is fixed by the fastener 35a in abutting contact from above against the upper portion of the roof beam 16 on the top surface 2 of the building unit 1. The beam-like member 71 is removed from the roof beam 16 by removing the fastener 35a.

[0192] In the upper part (upper flange 71b) of the beam-like member 71, a working hole 77 (through hole, FIG. 19) is formed at a position almost directly above the pilot hole 38, for performing the work of attaching and detaching the fastener 35a from above. The working hole 77 is preferably made larger than the pilot hole 38 so that the inside can be visually observed from the outside even with a tool or the like inserted. The working hole 77 is covered from above by the water drainage sheet 61 by placing the water drainage sheet 61 thereon.

[0193] The upper part (upper flange 71b) of the beam-like member 71 is made to be approximately the same height as the upper surface of the roof frame 21 that constitutes the roof panel 7. The upper part of the beam-like member 71 may be approximately horizontal, but if necessary, a gentle drainage gradient that descends in the width direction toward the waterproof zone 8 may be provided. In this case, a part of the drainage sheet 61 may be inclined along the drainage gradient of the upper flange 71b.

[0194] The flange portion 72 is a portion provided on the beam member 71 for mounting the inter-unit temporary rainproof cover 73. The flange portion 72 is provided continuously over the entire area of ​​the beam member 71 in the longitudinal direction 32. The flange portion 72 may be formed integrally with the beam member 71, but in this embodiment, the flange portion 72 is formed separately from the beam member 71 and is attached integrally to the beam member 71.

[0195] When the beam-like member 71 and the flange forming member 78 are constructed separately, it is preferable that the width dimension of the upper flange 71b of the beam-like member 71 be smaller than the width dimension of the lower flange 71c so that the flange portion 72 can be attached to that portion.

[0196] Furthermore, a metallic flange-forming member 78 having a crank-shaped cross section when viewed from the side may be provided separately from the beam-shaped member 71. The flange-forming member 78 is a member with a substantially uniform cross section that extends in the longitudinal direction 32 with substantially the same length as the beam-shaped member 71, and the flange portion 72 is formed integrally with the upper end portion of the flange-forming member 78.

[0197] Then, the flange forming member 78 is attached laterally to the upper part of the beam member 71 by fastening fixtures 79 such as bolts and nuts, whereby the flange portion 72 is integrated with the beam member 71 .

[0198] The beam member for attaching the water-repellent sheet is formed by combining the beam member 71 and the flange forming member 78. The beam member 71 and the flange forming member 78 (having the flange portion 72) may be a single long member that extends continuously over the entire length of the non-waterproof zone 9, or may be divided into several short members that are connected together for use.

[0199] The flange forming member 78 having a crank-shaped cross section has a lower vertical surface portion 78a, an upper vertical surface portion 78b, and a horizontal portion 78c. The horizontal portion 78c is provided at the upper end of the lower vertical surface portion 78a and extends horizontally toward the side opposite the waterproof zone 8. The upper vertical surface portion 78b is provided at the end of the horizontal portion 78c opposite the waterproof zone 8. The flange portion 72 is integrally formed at the upper end of the upper vertical surface portion 78b. The flange forming member 78 can be formed by bending a single metal plate.

[0200] A lower vertical surface portion 78a of a flange forming member 78 is laterally fixed in contact with a downward mounting portion 71d formed on the upper end portion of the upper flange 71b of the beam-shaped member 71 by a fastening fixture 79.

[0201] At this time, the horizontal portion 78c of the flange forming member 78, which is the base of the flange portion 72, is connected to the upper flange 71b of the beam-like member 71 so as to be substantially flush with the upper flange 71b and inclined in the width direction. Similarly, the upper vertical surface portion 78b, which is the base of the flange portion 72, raises the flange portion 72 higher than the horizontal portion 78c. Therefore, the flange portion 72 becomes higher than the upper flange 71b of the beam-like member 71 by the height of the upper vertical surface portion 78b.

[0202] The other beam member 71 has the same shape and structure as the above-mentioned beam member 71, and performs the same function. The other beam member 71 is attached to the other building unit 1(R) at the end position of the non-waterproof zone 9 on the side adjacent to one building unit 1(L). The other beam member 71 is installed in the other building unit 1(R) so as to be in a left-right opposite relationship with the beam member 71 of the adjacent one building unit 1(L).

[0203] The other flange portion 72 has the same shape and structure as the above-mentioned flange portion 72, and performs the same function. The other flange portion 72 is attached to the other beam-shaped member 71 in the same manner as the above-mentioned flange portion 72. The other flange portion 72 is attached so as to be in the opposite left-right relationship to the above-mentioned flange portion 72.

[0204] The inter-unit temporary rainproof cover 73 having a downward C-shaped cross section is a metal rail-shaped member that simultaneously holds a pair of flange portions 72. As shown in FIG. 20, the main body of the inter-unit temporary rainproof cover 73 having a downward C-shaped cross section extends in a uniform cross section in the longitudinal direction 32, and has a cover surface 73a, a pair of descending surfaces 73b, and a pair of lateral locking surfaces 73c. ​​The cover surface 73a is a substantially horizontal surface that simultaneously covers the pair of flange portions 72 from above. The pair of descending surfaces 73b extend downward from both ends of the cover surface 73a. The pair of lateral locking surfaces 73c extend laterally from the lower ends of the descending surfaces 73b in a direction approaching each other. The inter-unit temporary rainproof cover 73 having a downward C-shaped cross section can be formed by bending a single metal plate.

[0205] The inter-unit temporary rainproof cover 73 is a member that is placed between the pair of flange portions 72. After the building unit 1 is installed at the construction site, the inter-unit temporary rainproof cover 73 is attached (outside fitted, FIG. 21) between the pair of flange portions 72 by sliding it laterally from the end side of the flange portions 72 in the longitudinal direction 32. The inter-unit temporary rainproof cover 73 is removed from the building unit 1 together with the beam-like member 71 at an appropriate time when there is no longer any possibility of rain before the roof finishing work. The removed inter-unit temporary rainproof cover 73 is taken back to the factory and reused together with the beam-like member 71 in another building unit 1 under construction during rainy weather, etc.

[0206] The cover surface 73a has a width dimension slightly longer than the distance between the tip ends of the pair of flange portions 72. The descending surface 73b extends downward longer than the thickness of the pair of flange portions 72, and has a vertical length that does not reach the upper surface of the beam-shaped member 71. The horizontal locking surface 73c has a width dimension that does not reach (the upper vertical surface portion 78b of) the flange forming member 78, and extends to overlap with the flange portion 72. The horizontal locking surfaces 73c are separated from each other in an opposing state with almost no vertical positional deviation, with a gap between them that allows the upper vertical surface portion 78b of the pair of flange forming members 78 to fit therein. The left and right horizontal locking surfaces 73c are located below the pair of flange portions 72, and lock and hold the pair of flange portions 72 in the vertical direction.

[0207] The joint portion 74 is a gap (between the vertical surface portions 78b) formed between the flange portion 72 and another flange portion 72. The joint portion 74 is prevented from intrusion of rainwater by being covered from above with the inter-unit temporary rainproofing cover 73. The size of this joint portion 74 is smaller than the gap 65 between the building units 1, and is set to a size such that the upper vertical surface portions 78b do not abut against each other.

[0208] The other configurations are the same as those of the above-mentioned embodiments, so the description of the above-mentioned embodiments serves as a description of this embodiment.

[0209] (3-2) In the above, the inter-unit temporary rainproof cover 73 may be formed shorter than the joint portion 74, and may have a connecting portion 81 and a connected portion 82 at both ends, which can be connected to each other. The inter-unit temporary rainproof covers 73 may be connected together by a connecting portion 81 and a connected portion 82 to cover the joint portion 74 .

[0210] Here, the inter-unit temporary rain cover 73 may be the same length as the joint portion 74. However, the total length of the joint portion 74 is almost equal to the total length of the building unit 1 in the longitudinal direction 32, and is very long. Therefore, if the inter-unit temporary rain cover 73 is the same length as the joint portion 74, a large space and labor are required for installation work, which is not realistic, so it is preferable to make it sufficiently shorter than the joint portion 74. In this case, the length of the inter-unit temporary rain cover 73 may be set in any way, but it is preferable to set it to a length within a range of about 60 cm to 120 cm for easy handling. The multiple inter-unit temporary rain covers 73 are installed so that the rear end and the front end of the main body are butted together with almost no gap.

[0211] The connected portion 82 has a protrusion shape that protrudes upward from the rear end of the inter-unit temporary rainproof cover 73. The connected portion 82 is provided at a position that does not affect the butt joint between the main body portions of the inter-unit temporary rainproof cover 73.

[0212] The protruding connected portion 82 is mainly composed of a vertical surface portion 82a that extends almost directly upward from the upper surface (cover surface 73a) of the rear end portion of the inter-unit temporary rainproof cover 73. If necessary, a horizontal surface portion 82b that extends toward the tip side is formed at the upper end of the vertical surface portion 82a. The vertical surface portion 82a and the horizontal surface portion 82b are approximately L-shaped in a side view, and are positioned above the rear end portion of the inter-unit temporary rainproof cover 73.

[0213] The connecting part 81 has an enveloping shape that envelops and holds the protruding connected part 82 provided at the tip of the inter-unit temporary rainproof covers 73 from above (FIG. 22). When connected, the connecting part 81 covers and conceals the butt joint between the main body parts of the inter-unit temporary rainproof covers 73 from above, suppressing and preventing water from entering through the butt joint (waterproof function). The connecting part 81 is provided at a position that does not affect the butt joint between the main body parts of the inter-unit temporary rainproof covers 73.

[0214] The joint 81 has a support shape and includes a rising portion 81a, a horizontal portion 81b, and a rising portion 81c. The rising portion 81a protrudes directly upward from the upper surface 2 of the tip of the inter-unit temporary rainproof cover 73. The horizontal portion 81b extends from the upper end of the rising portion 81a in a direction beyond the tip. The rising portion 81c extends downward from the tip of the horizontal portion 81b.

[0215] The rising portion 81a and the rising portion 81c are slightly larger in vertical dimension than the vertical surface portion 82a, and the horizontal portion 81b is formed slightly longer than the horizontal surface portion 82b, so that the connected portion 82 can be accommodated inside the connecting portion 81 (FIG. 22). The rising portion 81a, the horizontal portion 81b, and the rising portion 81c are substantially inverted U-shaped in side view, and are formed in a position forward of the tip of the inter-unit temporary rainproof cover 73.

[0216] A pair of cover members 83 made of separate members are attached to both side surfaces of the connecting portion 81 so as to cover the both side surfaces. The cover members 83 are attached integrally to each part of the connecting portion 81 by fasteners 84 such as rivets at their upper edge portions and at the attachment margins provided on the front and rear edges, thereby preventing water from entering from the sides.

[0217] <Function> The function of this embodiment will now be described.

[0218] In this embodiment, depending on the weather and other conditions, the beam-like member 71 is attached to the non-waterproof zone 9 of the building unit 1 at the mounting portion 35 in the factory. After that, the water-repellent sheet 61 is attached between the waterproof zone 8 of the building unit 1 and the beam-like member 71. As a result, at least a part of the non-waterproof zone 9 is covered by the two types of temporary rainproofing members 31, the beam-like member 71 and the water-repellent sheet 61. At this time, by attaching the beam-like member 71 to the end of the non-waterproof zone 9, the non-waterproof zone 9 can be entirely covered. Therefore, for the building unit 1 alone, the rainproofing of the part of the non-waterproof zone 9 covered by the temporary rainproofing member 31 is almost completed at the factory stage.

[0219] At the construction site, an inter-unit temporary rainproof cover 73 is attached laterally along the longitudinal direction 32 to a joint 74 between a pair of flanges 72 provided on beam members 71 of a pair of building units 1 arranged adjacent to each other on the top floor. This causes the joint 74 to be covered from above with the inter-unit temporary rainproof cover 73, preventing rainwater from entering between the building units 1. This completes the rainproofing between the building units 1 at the construction site. At the construction site, only the inter-unit temporary rainproof cover 73 needs to be attached, so there is little work to be done and it can be completed easily in a short time.

[0220] The inter-unit temporary rainproof covers 73 are attached by connecting a plurality of rail-shaped covers that are shorter than the joint portions 74. The inter-unit temporary rainproof covers 73 are easily connected by fitting the connecting portions 81 and connected portions 82 together.

[0221] To remove the inter-unit temporary rainproof cover 73, first, pull the inter-unit temporary rainproof cover 73 out from between the pair of flange portions 72 along the longitudinal direction 32. At this time, the inter-unit temporary rainproof cover 73 is easily separated into short parts by disengaging the connecting portion 81 from the connected portion 82 in the vertical direction.

[0222] Next, the other side portion 36 of the water-repellent sheet 61 is peeled off from the beam member 71, and the beam member 71 is removed from the non-waterproof zone 9. The mounting portion 35 of the beam member 71 is removed using the working hole 77. In this manner, the beam member 71 is removed from the building unit 1.

[0223] The drainage sheet 61 may be left on the building unit 1 and used to waterproof the building, or may be removed and collected. If left on the building unit 1, the drainage sheet 61 may be used in its current position, or may be moved to a different position.

[0224] <Effects> According to this embodiment, the following effects can be obtained.

[0225] (Effect 3-1) The temporary rainproofing structure of a unit building may include a building unit 1 having a waterproof zone 8 in the center of the upper surface 2, the outside of which is a long and narrow non-waterproof zone 9 that runs along the waterproof zone 8, and a temporary rainproofing member 31 that is installed in the non-waterproof zone 9. This makes it possible to obtain the same effects as those of the above-mentioned embodiments.

[0226] The rainproofing member 31 may be a beam-like member 71 that extends in an elongated manner along the non-waterproof zone 9, and a water-repellent sheet 61 that seals the gap between the beam-like member 71 and the waterproof zone 8. This allows the rainproofing member 31 to be made up of a relatively small beam-like member 71 and a water-repellent sheet 61, and to be easy to handle with the minimum necessary size and shape. The elongated rainproofing member 31 allows the entire non-waterproof zone 9 to be efficiently rainproofed at once. In addition, by attaching the beam-like member 71 to the non-waterproof zone 9 and sealing the gap between the beam-like member 71 and the waterproof zone 8 with the water-repellent sheet 61, the non-waterproof zone 9 between the waterproof zone 8 and the beam-like member 71 can be reliably rainproofed. By attaching the beam-like member 71 and the water-repellent sheet 61 to the building unit 1 in advance at the factory, the building unit 1 can be shipped in a state in which the non-waterproof zone 9 of the building unit 1 is almost completely rainproofed by the beam-like member 71 and the water-repellent sheet 61.

[0227] The lower part of the beam-like member 71 is detachably attached to the non-waterproof zone 9 of the building unit 1 by the attachment part 35, and the upper part may have a flange part 72 extending toward the non-waterproof zone 9. An inter-unit temporary rainproof cover 73 (FIG. 18) may be fitted between the flange parts 72 of the beam-like member 71 attached to a pair of adjacently installed building units 1. The inter-unit temporary rainproof cover 73 has a downward C-shaped cross section, and holds the pair of flange parts 72 so as to cover the joint part 74 between the flange parts 72 from above.

[0228] As a result, the inter-unit temporary rainproofing cover 73 having a downward C-shaped cross section can be fitted to the joint 74 between the flange 72 and another flange 72 of another beam-like member 71 attached to the adjacently installed building unit 1 in a state of being wrapped around the joint 74 from above. Therefore, by simply attaching the inter-unit temporary rainproofing cover 73 between the pair of flanges 72, the joint 74 between adjacent building units 1 can be temporarily rainproofed easily in a short time without much effort at the construction site. The inter-unit temporary rainproofing cover 73 can be attached by inserting it sideways from the end side of the pair of flanges 72 toward the longitudinal direction 32 of the flanges 72, so that the attachment is simple and does not require work at high altitudes. In addition, the inter-unit temporary rainproofing cover 73 can be easily removed by simply sliding the inter-unit temporary rainproofing cover 73 in the longitudinal direction 32 and removing it from the end side of the pair of flanges 72.

[0229] (Effect 3-2) The inter-unit temporary rainproof covers 73 are formed shorter than the joint portions 74, and have connecting portions 81 and connected portions 82 at both ends, which can be connected to each other. The inter-unit temporary rainproof covers 73 may be connected in multiple parts by the connecting portions 81 and the connected portions 82 to cover the joint portions 74.

[0230] As a result, by attaching multiple short inter-unit temporary rainproof covers 73 between a pair of flange portions 72, the entire joint portion 74 is covered by multiple inter-unit temporary rainproof covers 73 connected by the connecting portions 81 and connected portions 82. Therefore, even in a small space, the inter-unit temporary rainproof covers 73 can be easily installed to cover the entire joint portion 74. The short inter-unit temporary rainproof covers 73 are easy to handle, and can be easily connected by the connecting portions 81 and connected portions 82 at both ends. The connected inter-unit temporary rainproof covers 73 can be easily removed by separating the connecting portions 81 and connected portions 82. [Explanation of symbols]

[0231] 1 Building unit 2 Top side 8 Waterproof Zones 9. Non-waterproof zone 11 Top edge 31 Temporary rainproofing materials 32 Longitudinal 33 One side 34 Boundary part 35 Mounting part 36 Other side 37 Temporary stop 41 Temporary rainproof sheet 43 Fastener section 44 Slider 45 Lead 58 Magnet 59 Hook and loop fastener 61 Draining sheet 62 Width dimension 71 Beam-like member 72 Flange 73 Temporary rainproof cover between units 74 Joint 81 Connecting part 82 Connected part

Claims

1. A building unit having a waterproof zone in the center of an upper surface, and an elongated non-waterproof zone extending along the waterproof zone on the outside of the waterproof zone; A temporary rainproofing member is provided in the non-waterproof zone, The waterproofing member extends elongatedly along the non-waterproof zone, The periphery of one side along the longitudinal direction is detachably attached to the boundary portion of the waterproof zone with the non-waterproof zone by an attachment portion, A temporary rainproofing structure for a unit building, characterized in that the other side portion along the longitudinal direction of the temporary rainproofing member is deformed from a state in which it is temporarily fixed to the upper part of the building unit by a temporary fixing portion to a state in which it covers the non-waterproof zone.

2. The temporary rainproofing structure for a unit building according to claim 1, The temporary rainproofing member is a temporary rainproofing sheet, The temporary rainproof sheet has a fastener portion on the other side portion, The fastener portion is connected to another fastener portion on the other side of another temporary rainproofing sheet attached as the temporary rainproofing member to the adjacently installed building unit by using a slider, A temporary rainproofing structure for a unit building, characterized in that a lead string extending from one end side to the other end side of the temporary rainproofing sheet in the longitudinal direction is attached to the slider.

3. The temporary rainproofing structure for a unit building according to claim 1, The temporary rainproofing member is a temporary rainproofing sheet, The temporary rainproof sheet has a magnet or a hook-and-loop fastener portion on the other side portion, A temporary rainproofing structure for a unit building, characterized in that the magnets or the hook-and-loop fastener portions are joined to each other by magnetic force or attraction force when the other side portions of the temporary rainproofing sheets of a pair of adjacently installed building units are overlapped together.

4. The temporary rainproofing structure for a unit building according to claim 1, The temporary rainproofing member is a water-repellent sheet, The drainage sheet has a width dimension such that the other side portion reaches at least the adjacent building unit; A temporary rainproofing structure for a unit building, characterized in that the water-repellent sheet is stretched across a pair of building units to cover one or both of the non-waterproof zones between the pair of building units.

5. A building unit having a waterproof zone in the center of an upper surface, and an elongated non-waterproof zone extending along the waterproof zone on the outside of the waterproof zone; A temporary rainproofing member provided in the non-waterproof zone, The temporary rainproofing member is a beam-like member extending in an elongated manner along the non-waterproof zone, and a water-repellent sheet sealing the gap between the beam-like member and the waterproof zone, The beam-like member has a lower portion that is detachably attached to the non-waterproof zone of the building unit by an attachment portion, and has an upper portion that has a flange portion that extends toward the non-waterproof zone, A temporary rainproofing structure for a unit building, characterized in that an inter-unit temporary rainproofing cover having a downward C-shaped cross section is fitted in an enveloping state between the flange portions of the beam-like members attached to a pair of adjacently installed building units so as to cover the joint portion between the flange portions from above.

6. The temporary rainproofing structure for a unit building according to claim 5, The inter-unit temporary rainproof cover is formed shorter than the joint portion and has a connecting portion and a connected portion that can be connected to each other at both ends, A temporary rainproofing structure for a unit building, characterized in that the inter-unit temporary rainproofing cover covers the entire area of ​​the joint portion while being connected in multiple parts by the connecting portions and the connected portions.

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