JP2024066189A - Temporary rainproofing structure on top of building unit - Google Patents

Abstract

[Problem] Mainly, to suppress and prevent rainwater from entering the interior while suppressing the influence of the arrangement of the building units, etc., even if the temporary rainproofing sheet is made small. [Solution] The upper surface temporary rainproofing structure of the building units 2, 3 includes a temporary rainproofing sheet 22 covering the upper side 21 of the building unit 2, and another temporary rainproofing sheet 24 covering another adjacent upper side 23 of another building unit 3 arranged adjacently in a step-like manner with a position shifted from the building unit 2. The temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 have a connectable covering part 25 that covers the overlapping part 8 of the upper side 21 and the other upper side 23 and can be connected and fixed to each other, at the overlapping part 8 of the upper side 21 and the other upper side 23. At least one of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 has a non-connecting covering part 26 that covers the top of the position shifting part 9 of the upper side 21 and the other upper side 23, and a widening part 27 that hangs downward from the non-connecting covering part 26, at the position shifting part 9 of the upper side 21 and the other upper side 23. [Selected Figure] Figure 2

Description

This invention relates to a temporary rainproofing structure for the top surface of a building unit.

Some buildings, such as houses, are made up of unit buildings. Unit buildings are made up of prefabricated rectangular building units that are transported to a construction site and assembled and installed there, allowing them to be constructed in a short period of time (see, for example, Patent Document 1).

For such building units, it is necessary to provide temporary weatherproofing to prevent rainwater from entering the interior of the building unit between the time the building unit is shipped (from a factory, etc. to the construction site) and the time the unit building is installed at the construction site and the building is completed.

For this reason, in Patent Document 1, for example, when it rains, the building unit is covered with a waterproof sheet of a size and shape that covers the entire top and sides of the building unit, and then the building unit is shipped.

Japanese Utility Model Application Publication No. 5-17003

In the above-mentioned Patent Document 1, the building unit is shipped covered with a waterproof sheet of a size and shape that covers the entire top and sides of the building unit when it rains. However, because the building unit is a large box, making the waterproof sheet a size and shape that matches the entire top and sides of the building unit results in a large waterproof sheet, which requires time and cost to manufacture. Furthermore, a waterproof sheet of the size and shape described above is difficult to handle, and it is time-consuming to attach and detach the waterproof sheet from the building unit, for example.

Therefore, it is desirable to make the waterproof sheet smaller, but if the waterproof sheet is made smaller, rainwater will be more likely to seep inside the building unit. It will also be more easily affected by factors such as the placement of the building unit.

Therefore, the main objective of the present invention is to contribute to improving the above-mentioned problems.

In response to the above problems, the present invention provides:
A temporary rainproof sheet covering the upper edge of the building unit;
and another temporary rainproofing sheet covering another adjacent upper side portion of another building unit arranged adjacent to the building unit in a stepped manner by shifting the position of the building unit,
The temporary rainproof sheet and the other temporary rainproof sheet have a connectable covering portion at the position of the overlapping portion where the upper side portion and the other upper side portion overlap, the connectable covering portion covering the overlapping portion and connectable and fixed to each other,
At least one of the temporary rainproofing sheet and the other temporary rainproofing sheet is characterized by an upper surface temporary rainproofing structure of a building unit having a non-connected covering portion covering the top of the misaligned portion at the position of the misaligned portion where the upper edge portion and the other upper edge portion do not overlap, and an expanded portion hanging downward from the non-connected covering portion.

According to the present invention, the above configuration makes it possible to reduce or prevent rainwater from entering the interior of a building unit while minimizing the impact of the placement of the building unit, even if the temporary rainproofing sheet is made small.

FIG. 1 is a plan view of a building (unit building) equipped with a top surface rainproofing structure according to this embodiment. FIG. 2 is a perspective view of the upper surface waterproofing structure of FIG. 1 . 3 is a vertical cross-sectional view taken along line AA in FIG. 2. FIG. 3 is an enlarged perspective view of part B in FIG. 2 . FIG. 3 is an enlarged perspective view of part C in FIG. 2 . FIG. 3 is an enlarged perspective view of a portion D in FIG. 2 .

This embodiment will be described in detail using Figures 1 to 6.

<Configuration> The configuration of this embodiment is as follows:

For example, Figure 1 is a floor plan of building 1. This building 1 is a unit building.

A unit building is a building 1 that can be constructed in a short period of time by transporting rectangular parallelepiped building units 2 and 3 that have been manufactured in advance at a factory to a construction site and assembling and installing them at the construction site. Note that the building 1 is not limited to being composed of two building units 2 and 3.

The rectangular building units 2, 3 each have four sides 4, 5 and four sides 6, 7 around their periphery. Sides 4, 5 and sides 6, 7 are vertical faces that make up the outer periphery of the rectangular building units 2, 3. Of these, side 4 and side 6 are faces in the long side direction X of the building units 2, 3. Side 5 and side 7 are faces in the short side direction Y of the building units 2, 3.

In the unit building shown in the figure, building units 2 and 3 are installed side by side in the short side direction Y. Therefore, the short side direction Y is the adjacent direction of building units 2 and 3. However, the adjacent direction may also be the long side direction X.

The building units 2 and 3 are also installed with their positions shifted in the long side direction X. Therefore, the long side direction X is the direction of positional shift of the building units 2 and 3. However, the positional shift direction may also be the short side direction Y.

In this embodiment, the adjacent direction is the short side direction Y, and the positional deviation direction is the long side direction X.

The opposing sides 4, 6 of adjacently arranged building units 2, 3 face each other with overlapping portions 8 facing the interior, and non-overlapping misaligned portions 9 facing the exterior.

Exterior walls 11, 12 are attached to the outdoor facing portions of sides 4, 5 and sides 6, 7 of the building units 2, 3. The exterior walls 11, 12 are also attached to the misaligned portions 9 of the opposing sides 4, 6. The exterior walls 11, 12 are not attached to the overlapping portions 8 of the opposing sides 4, 6.

In such building units 2, 3, temporary waterproofing is required to prevent rainwater from entering the interior of the building units 2, 3 from the time of shipment of the building units 2, 3 until the unit building is installed at the construction site and the building 1 is completed.

For this reason, at least when it rains, top surface rainproofing members are attached to the top surface 13 of the building units 2, 3, so that the building units 2, 3 are shipped in a state protected from rainwater. The top surface rainproofing members are attached to the building units 2, 3 after the building units 2, 3 are manufactured in the factory and before they are shipped to the construction site. Note that the top surface rainproofing members may be attached to the building units 2, 3 in advance as rainproofing members even when it is not raining.

The exterior sides 4, 5 and 6, 7 of the building units 2, 3 are protected from rainwater by the exterior walls 11, 12 described above, and are fully weatherproofed.

In addition, a temporary rainproofing member for the side (not shown) is attached to the overlapping portion 8 of the sides 4, 6 of the building units 2, 3, which are on the indoor side, instead of the exterior walls 11, 12.

In addition to the above configuration, this embodiment may also have the following configuration:

(1) As shown in FIG. 1 (FIG. 2), the upper surface waterproofing structure of the building units 2 and 3 is as follows:
A temporary rainproof sheet 22 for covering the upper side portion 21 of the building unit 2;
and another temporary rainproof sheet 24 covering another adjacent upper side part 23 of another building unit 3 arranged adjacently in a stepped manner with a position shifted from the building unit 2.
The temporary rainproof sheet 22 and the other temporary rainproof sheet 24 have a connectable covering portion 25 that covers the overlapping portion 8 and can be connected and fixed to each other at the position of the overlapping portion 8 where the upper edge portion 21 and the other upper edge portion 23 overlap.
In addition, at least one of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 has a non-connecting covering portion 26 that covers the top of the misalignment portion 9 at the position of the misalignment portion 9 where the upper edge portion 21 and the other upper edge portion 23 do not overlap, and a widening portion 27 that hangs downward from the non-connecting covering portion 26.

Here, the top surface waterproofing structure of the building units 2, 3 is a structure that temporarily protects the top surface 13 of the building units 2, 3 from rainwater by covering it with a top surface waterproofing material. The top surface 13 of the building units 2, 3 is protected by the top surface waterproofing material when the building units 2, 3 are transported from the factory and when they are installed at the construction site. This example is targeted at the top floor building units 2, 3.

When building units 2 and 3 are not being distinguished, they will simply be referred to as building units 2 and 3, but when they are being distinguished, they will be referred to as building unit 2 and another building unit 3.

As shown in FIG. 3, the upper edge portion 21 refers to the edge portion 13a that forms the outer shape of the top surface 13 of the building unit 2, and the non-waterproof zone 31 around the edge portion 13a. There are four upper edge portions 21 along the periphery of the top surface 13 of the building unit 2, but in this embodiment, the upper edge portion 21 adjacent to another building unit 3 is the subject of the discussion.

The top floor building units 2 and 3 have a roof panel 32 that is slightly smaller than the upper surface 13 installed in the center of the upper surface 13.

The roof panel 32 is formed by connecting a pair of parallel roof frames 32a with roof surface material 32b to form a panel, and attaching waterproof roofing material 32c to the roof frames 32a and roof surface material 32b. The roof surface material 32b is attached to the roof frame 32a via mounting rails 32d. Solar panels 33 may be attached on top of the roofing material 32c.

Because the roof panel 32 is waterproof, the center of the top surface 13 of the building units 2 and 3, where the roof panel 32 is installed, becomes a waterproof zone 34. The upper edge portion 21 of the top surface 13, where the roof panel 32 is not installed, becomes the non-waterproof zone 31 described above. The non-waterproof zone 31 has an elongated shape between the edge portion 13a of the top surface 13 of the building units 2 and 3 and the edge portion 32e of the roof panel 32.

The temporary rainproofing sheet 22 is a member that constitutes the main part of the upper surface temporary rainproofing member, and covers the upper edge 21 of the building unit 2 (first unit) to waterproof the non-waterproof zone 31. The temporary rainproofing sheet 22 is basically an elongated, almost strip-shaped member that has a width and length sufficient to cover the upper edge 21 of the building unit 2 and extends along the upper edge 21. The temporary rainproofing sheet 22 is formed from a flexible resin sheet material that has waterproof properties.

In this case, the upper edge 21 to which the temporary rainproof sheet 22 is attached is the upper edge 21 of the building unit 2 on the side where another adjacent building unit 3 is located. Other temporary rainproof sheets (not shown) may be attached to other upper edges of the building unit 2 as necessary.

One widthwise side of the temporary rainproofing sheet 22 is fixed from above to the edge 32e of the roof panel 32 with a fixing member 35 such as a screw, and the other widthwise side is spread over the non-waterproof zone 31 toward the side of the edge 13a of the upper surface 13.

A drainage sheet 36, which can also be used for permanent rainproofing, is attached under the temporary rainproofing sheet 22. Like the temporary rainproofing sheet 22, one widthwise side of the drainage sheet 36 is fixed from above to the edge 32e of the roof panel 32 with a fixing member 35 such as a screw, and the other widthwise side is spread over the non-waterproof zone 31 toward the edge 32e of the top surface 13. The other side of the drainage sheet 36 extends beyond the edge 32e of the top surface 13 and is overlapped on the top of the exterior wall 11.

The other building unit 3 is a building unit 3 (second unit) adjacent to the building unit 2. As with the building unit 2, the other building unit 3 has a waterproof roof panel 32 installed in the center of the top surface 13, making the center a waterproof zone 34, and another upper edge portion 23 where the roof panel 32 is not installed making a non-waterproof zone 31.

The other top edge portion 23 is the top edge portion 23 of another building unit 2, and is adjacent to the top edge portion 21 of an adjacent building unit 2 (adjacent top edge portion). The other top edge portion 23 is substantially similar to the top edge portion 21.

The other temporary rainproofing sheet 24 is a member that constitutes the main part of the upper surface temporary rainproofing member, and covers the other upper edge portion 23 of the other building unit 3 to waterproof the non-waterproof zone 31. The other temporary rainproofing sheet 24 is basically an elongated, approximately strip-shaped member that has a width and length sufficient to cover the other upper edge portion 23 of the other building unit 3 and extends along the other upper edge portion 23. The other temporary rainproofing sheet 24 is formed from a flexible resin sheet material that has waterproof properties.

In addition, other temporary rainproofing sheets 22 (not shown) may be attached to the other upper edges of the other building units 3 as necessary.

The other temporary rainproofing sheet 24 has one widthwise side fixed from above to the edge 32e of the roof panel 32 with a fixing member 35 such as a screw, and the other widthwise side is spread over the non-waterproof zone 31 toward the edge 32e of the upper surface 13.

A drainage sheet 36 that can also be used for permanent rainproofing is attached under the other temporary rainproofing sheet 24. Like the other temporary rainproofing sheet 24, the drainage sheet 36 has one widthwise side fixed from above to the edge 32e of the roof panel 32 with a fixing member 35 such as a screw, and the other widthwise side is spread over the non-waterproof zone 31 toward the side of the side 13a of the top surface 13. The other side of the drainage sheet 36 extends beyond the edge 32e of the top surface 13 and is overlapped on the top of the exterior wall 12.

As shown in FIG. 2, the overlapping portion 8 is the portion of the opposing sides 4, 6 of adjacently installed building units 2 and another building unit 3 that overlap and face the interior side of the room.

Covering the overlapping portion 8 means that the connectable covering portion 25 is installed on top of the overlapping portion 8, which is the non-waterproof zone 31, so as to hide the overlapping portion 8.

The connectable covering portion 25 is a portion that covers the overlapping portion 8 of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24. The connectable covering portion 25 is designed to connect and integrate the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24. By connecting the connectable covering portions 25 to each other, the non-waterproof zone 31 above the overlapping portion 8 between the building unit 2 and the other building unit 3 and the gap between the units are covered to prevent the infiltration of rainwater.

The connectable covering portion 25 is formed to a width such that the other side portions of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 are butted against each other or overlap each other.

The connectable covering parts 25 can be connected to each other, so they only need to have a width that can cover the gap between the overlapping parts 8 when the temporary rainproof sheet 22 and the other temporary rainproof sheet 24 are joined together. Therefore, the width of the connectable covering parts 25 of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24 may be the same or different.

The connectable covering portion 25 may include a fastener or other connector 37, for example, around the other side. The fastener is provided along the other side within the range of the connectable covering portion 25.

The connectable covering portion 25 of the temporary rainproofing sheet 22 or another temporary rainproofing sheet 24 may be temporarily fixed to the side surfaces 4, 6 of the building units 2, 3 (not shown) before being connected with the connector 37 (e.g., during transportation). The connectable covering portion 25 is temporarily fixed by attaching it to the upper part of the side surfaces 4, 6 of the building units 2, 3 with an adhesive tape such as masking tape.

The temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 can have the same width of the connectable covering portion 25, and the connector 37 can be provided at the position of the gap between the building unit 2 and the other building unit 3.

However, in this embodiment, the fastener is provided in a position close to the edge 32e of the roof panel 32 installed on the upper surface 13 of the building unit 2. Therefore, the temporary rainproof sheet 22 is narrower than the other temporary rainproof sheet 24, and the other temporary rainproof sheet 24 is correspondingly wider than the temporary rainproof sheet 22.

That is, because the roof panel 32 is thick, the portion where the roof panel 32 is installed is higher than the upper surface 13 of the building units 2 and 3. The fastener is provided at a high position close to the roof panel 32, taking advantage of the difference in height between the roof panel 32 and the upper surface 13 of the building units 2 and 3. As a result, when the connectable covering portion 25 is connected with a fastener, rainwater does not remain on the fastener but flows down, making it possible to prevent rainwater from entering through the fastener.

The misaligned portion 9 is an externally exposed portion (protruding portion) on the opposing sides 4, 6 of the adjacently installed building unit 2 and another building unit 3, which is located on the outdoor side due to the misaligned arrangement. Since the misaligned portion 9 is located on the outdoor side, exterior walls 11, 12 are attached to it.

Note that the misaligned portion 9 may occur in one or both of the building unit 2 and the other building unit 3.

For example, if the widths of the opposing sides 4, 6 of the building unit 2 and another building unit 3 are the same, the opposing sides 4, 6 are installed with their positions shifted in the width direction of the sides 4, 6 (long side direction X in this embodiment). In this case, the misaligned portion 9 occurs in both the building unit 2 and the other building unit 3.

For example, when the widths of the opposing sides 4, 6 of a building unit 2 and another building unit 3 are different, the positions of one edge 32e of the opposing sides 4, 6 are aligned when the building unit 2 and another building unit 3 are installed. In this case, the other edge 32e is misaligned in the width direction of the sides 4, 6, so the misaligned portion 9 occurs in the building unit 2 or the other building unit 3 with the larger width of the sides 4, 6.

In this embodiment, a misaligned portion 9 is formed in both the building unit 2 and the other building unit 3.

Covering the misaligned portion 9 means that the non-connected covering portion 26 is placed on top of the misaligned portion 9, which is the non-waterproof zone 31, so as to hide the misaligned portion 9.

The non-connected covering portion 26 is a portion that covers the misaligned portion 9 on at least one of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24. The non-connected covering portion 26 is made to have a width that can cover the non-waterproof zone 31 of the misaligned portion 9. In other words, the non-connected covering portion 26 has a width that reaches the side portion 13a.

The widened portion 27 is a portion that is formed by extending (the other side portion of) the non-connected covering portion 26 in the width direction to widen the width of the non-connected covering portion 26 that covers the misaligned portion 9 of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24. The widened portion 27 is formed integrally with the non-connected covering portion 26.

The widening portion 27 extends outward from the upper edge portion 21 and hangs downward to cover the upper portions of the exterior walls 11, 12 attached to the lower side surfaces 4, 6 of the upper edge portion 21. The widening portion 27 may be made wide enough to extend beyond the other end of the drainage sheet 36 and cover the upper portions of the exterior walls 11, 12.

The widened portion 27 of the temporary rainproof sheet 22 or another temporary rainproof sheet 24 may be temporarily fixed to the side surfaces 4 and 6 by attaching the other side portion to the upper portion of the side surfaces 4 and 6 (exterior walls 11 and 12) with adhesive tape 38 such as masking tape so that it does not turn over during transportation.

In this embodiment, since both the building unit 2 and the other building unit 3 have the misaligned portion 9, the widening portion 27 is formed in both the temporary rainproof sheet 22 and the other temporary rainproof sheet 24. In FIG. 2, the widening portion 27 of the temporary rainproof sheet 22 is shown, but the other temporary rainproof sheet 24 is almost the same.

(2) As shown in FIG. 4 (FIG. 2), in the upper surface temporary rainproofing structure of the building units 2 and 3,
At least the other of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24 has an extension portion 42 at an end portion 41 extending toward the widened portion 27 formed on one of the sheets,
The extension portion 42 may have a folded portion 43 that is folded back on the front surface side.

Here, the other is one of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24, which does not have the widening portion 27 formed.

In this case, the end 41 is the longitudinal end portion of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24. The end 41 is the end position of the connectable covering portion 25 of the other of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24.

One of the temporary rainproofing sheets 22 and another temporary rainproofing sheet 24 has a widened portion 27 formed on it.

The extension portion 42 is at least a portion of the end portion 41 of the connectable covering portion 25 of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24, which is extended longitudinally along the upper edge portion 21 or the other upper edge portion 23.

The extension 42 is extended longer than the length that reaches the widening portion 27. The extension 42 is installed so as to overlap the front or back surface of the widening portion 27. In this embodiment, the extension 42 is inserted into the back surface side of the widening portion 27 and overlaps the back surface of the widening portion 27. In this state, the part of the extension 42 on the back surface side of the widening portion 27 becomes a vertical surface and is sandwiched between the outer walls 11, 12 attached to the lower side surfaces 4, 6 of the misaligned portion 9.

The folded portion 43 is formed by folding the tip of the extension portion 42 180 degrees along a vertical crease line 43a extending in the up-down direction Z so that the outer surface faces inward. The folded portion 43 is provided at a position where it overlaps with the front portion of the widening portion 27 (the portion close to the connectable covering portion 25). In this embodiment, the folded portion 43 is hidden by the widening portion 27.

The folded-back portion 43 may be fastened to one of the widened portions 27 of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24 with a fastener 44 such as a hook so that the folded-back portion 43 is stabilized in the folded-back shape.

The extension section 42 and the folded-back section 43 only need to be provided on the underwater side.

The above-water side and below-water side are formed by providing a slight slope to the connectable covering portion 25 of the temporary rainproofing sheet 22 and the separate temporary rainproofing sheet 24 to create a drainage gradient. The above-water side and below-water side are also formed on the top surface 13 of the building units 2, 3. It is preferable that the above-water side and below-water side of the temporary rainproofing sheet 22 and the separate temporary rainproofing sheet 24 and the above-water side and below-water side of the top surface 13 of the building units 2, 3 are aligned in the same direction.

In this embodiment, the side of the widened portion 27 of the temporary rainproof sheet 22 is the belowwater side. On the abovewater side, the extension portion 42 and the folded portion 43 may be provided, or may not be provided as shown in FIG. 5. In this embodiment, the side of the widened portion 27 of another temporary rainproof sheet 24 is the abovewater side.

(3) As shown in FIG. 5 (FIG. 2), in the upper surface temporary rainproofing structure of the building units 2 and 3,
The widening portion 27 may be provided with a string portion 51 for fastening.

Here, the string portion 51 is a thin, flexible, cord-like member. The widening portion 27 has a string-passing hole 52 at least at the corner portion of the other side in the width direction. The string portion 51 may be tied to the widening portion 27 by passing it through the string-passing hole 52 or a ring-shaped member 53 attached to the string-passing hole 52. The string-passing hole 52 may have protective grommets attached to the hole edge.

In the figure, the string portion 51 is provided at the corner portion of the other side of the widening portion 27, which is closer to the connectable covering portion 25. However, the string portion 51 may also be provided at the corner portion of the other side of the widening portion 27, which is opposite the connectable covering portion 25.

The string portion 51 may have a length at least sufficient to tie the widening portion 27 to, for example, an external scaffolding (not shown).

A similar string portion 54 can also be provided on the end 41 of the temporary rainproof sheet 22 and another temporary rainproof sheet 24.

In this case, the end 41 is the end position of the connectable covering portion 25 at the end 41 of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24, and is the above-water part where the extension portion 42 and the folded-back portion 43 are not present.

The string portion 54 may have a suitable length sufficient to tie at least the end 41 of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24, for example, to an external scaffolding (not shown).

(4) Other configurations

As shown in FIG. 6 (FIG. 2), the ends 61 of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 may be provided with a fascia-shaped waterproof sheet 62 that hangs down and covers the upper parts of the sides 5, 7 of the building units 2, 3.

The end 61 is the longitudinal end of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24. In this case, the end 61 is the end of the non-connected covering portion 26 and the widening portion 27 of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24, and is the end opposite the connectable covering portion 25.

The fascia-shaped waterproof sheet 62 is a fascia-shaped protective member formed from a flexible, waterproof resin sheet material. The fascia-shaped waterproof sheet 62 extends horizontally to protect the upper parts of the sides 5, 7 (exterior walls 11, 12) adjacent to the sides 4, 6 of the building units 2, 3 from rainwater. The fascia-shaped waterproof sheet 62 may be fastened to the temporary rainproof sheet 22 and another temporary rainproof sheet 24 with fasteners 63 such as hooks.

The fascia-shaped waterproof sheet 62 may extend horizontally from the underside of the end 61 to the vicinity of a bracket 64 provided on the upper part of the side surface 5, 7 of the building unit 2, 3. The fascia-shaped waterproof sheet 62 may be fastened to the bracket 64 with a string 65. The bracket 64 may be, for example, a bracket for holding a rain gutter (rain gutter holding bracket).

The string 65 can be substantially similar to the string portion 51 of the widening portion 27. The string 65 may have a suitable length sufficient to be tied to the bracket 64.

The fascia-shaped waterproof sheet 62 can prevent rainwater from entering through the upper parts of the sides 5 and 7 of the building units 2 and 3.

A fascia-shaped waterproof sheet 66 similar to the fascia-shaped waterproof sheet 62 may be provided on the end 41 of the connectable covering portion 25 of the temporary rainproof sheet 22 and another temporary rainproof sheet 24, as shown in Figures 4 and 5.

The fascia-shaped waterproof sheet 66 can prevent rainwater from entering through the upper parts of the sides 5 and 7 of the building units 2 and 3.

Furthermore, the connectable covering portion 25 of the temporary rainproofing sheet 22 or another temporary rainproofing sheet 24 may have a vertical waterproof cover 67 at its end 41, which covers the gap in the vertical direction Z between the end 41 and the fascia-shaped waterproof sheet 66.

The standing waterproof cover 67 may be provided on one side of the end 41 of the temporary rainproof sheet 22 or another temporary rainproof sheet 24 in the width direction. The standing waterproof cover 67 hangs down from one side to form a vertical surface parallel to the fascia-shaped waterproof sheet 66. The standing waterproof cover 67 may be formed integrally with the temporary rainproof sheet 22 or another temporary rainproof sheet 24, or may be formed separately.

The lower end of the standing waterproof cover 67 may be placed in a state where it is almost in contact with the surface side of the fascia-shaped waterproof sheet 62, and fastened with a fastener 68 such as a hook.

The standing waterproof cover 67 covers the gap formed by the height difference caused by the thickness of the roof panel 32 between the end 41 of the temporary rainproof sheet 22 or another temporary rainproof sheet 24 and the fascia-shaped waterproof sheet 62. The standing waterproof cover 67 can prevent rainwater from entering through the gap.

The ends of the drainage sheet 36 in the long side direction X provided under the temporary rainproof sheet 22 and the other temporary rainproof sheet 24 may be bent to the side or upwards in the long side direction X to cover the tops of the corners of the upper surfaces 13 of the building units 2 and 3.

<Function> The function of this embodiment is as follows:

Building 1 is constructed at a construction site. Building 1 is a unit building. The unit building is constructed by transporting rectangular parallelepiped building units 2 and 3, which have been manufactured in advance at a factory, to the construction site, where they are assembled and installed.

In this case, after the building unit 2 is installed, another building unit 3 is placed adjacent to the building unit 2 in a stepped manner, shifting its position relative to the building unit 2. The building unit 2 and the other building unit 3 are installed on the top floor of the building 1.

The top surface 13 of such building units 2 and 3 is temporarily waterproofed as follows:

That is, at the factory, a temporary rainproof sheet 22 is attached to the upper edge 21 of the building unit 2, and the upper edge 21 is covered with the temporary rainproof sheet 22. As a result, the upper edge 21 of the upper surface 13 of the building unit 2 is protected from rainwater and temporarily rainproofed during transportation from the factory to the construction site.

In addition, at the factory, another temporary rainproofing sheet 24 is attached to another upper edge portion 23 adjacent to the upper edge portion 21 of another building unit 3, and the other upper edge portion 23 is covered with the other temporary rainproofing sheet 24. As a result, the other upper edge portion 23 of the top surface 13 of the other building unit 3 is protected from rainwater during transportation from the factory to the construction site, and is temporarily rainproofed.

The upper surface 13 of the building units 2, 3 has a waterproof roof panel 32 attached to its center at the factory, and the portion where the roof panel 32 is installed becomes a waterproof zone 34. The upper edge portion 21 and the other upper edge portion 23 of the upper surface 13 of the building units 2, 3, which do not have the roof panel 32, become a non-waterproof zone 31. Therefore, the upper edge portion 21 and the other upper edge portion 23 to which the roof panel 32 is not attached are covered with a small temporary rainproof sheet 22 and another temporary rainproof sheet 24. As a result, the upper surface 13 of the building units 2, 3 is temporarily rainproofed by the small temporary rainproof sheet 22 and the other temporary rainproof sheet 24 for the upper edge portion 21 and the other upper edge portion 23, which become the non-waterproof zone 31.

When the building unit 2 and the other building unit 3 are installed at the construction site, most of the roof of the building 1 is in place with the roof panels 32 attached to the top surfaces 13 of the building unit 2 and the other building unit 3.

After the building unit 2 and the other building unit 3 are installed at the construction site, as shown in FIG. 2, the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 connect and fix the connectable covering portion 25 to each other. The connectable covering portion 25 is provided at the position of the overlapping portion 8 where the building unit 2 and the other building unit 3 overlap. The connectable covering portion 25 is connected by a connector 37 such as a fastener. This provides a temporary rainproofing between the overlapping portion 8 of the building unit 2 and the other building unit 3 by the connectable covering portion 25. This prevents rainwater from entering between the overlapping portion 8 of the building units 2 and 3.

In addition, the non-connected covering portion 26 provided at the position of the step-like misaligned portion 9 between the building unit 2 and the other building unit 3 of at least one of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 covers the upper part of the misaligned portion 9. The widening portion 27 provided by expanding the width of the non-connected covering portion 26 hangs down and covers the upper part of the side surfaces 4 and 6 of the building units 2 and 3. During transportation, the other end of the widening portion 27 is attached to the side surfaces 4 and 6 of the building units 2 and 3 with adhesive tape 38. After installation, the widening portion 27 is fixed to an external scaffolding or the like with a string portion 51. As a result, the misaligned portion 98 of at least one of the building unit 2 and the other building unit 3 is temporarily rainproofed by the non-connected covering portion 26 and the widening portion 27.

At this time, the longitudinal extension 42 provided on at least the other end 41 of the temporary rainproof sheet 22 and the other temporary rainproof sheet 24 is extended toward the widening portion 27 formed on one side. The extension 42 is then folded back toward the front side by providing a fold-back portion 43. This allows the extension 42 to guide rainwater from the connectable covering portion 25 to the widening portion 27, while the fold-back portion 43 stops the flow of rainwater along the extension 42 at the position of the widening portion 27 and allows it to be drained downward.

Furthermore, a fascia-shaped waterproof sheet 62 and a fascia-shaped waterproof sheet 66 may be attached to the ends 61 and 41 of the temporary rainproof sheet 22 and another temporary rainproof sheet 24, respectively, to cover the upper parts of the sides 5 and 7 of the building units 2 and 3 with the fascia-shaped waterproof sheet 62 and the fascia-shaped waterproof sheet 66. This allows the fascia-shaped waterproof sheet 66 to prevent rainwater from entering the upper parts of the sides 5 and 7 of the building units 2 and 3.

In addition, a vertical waterproof cover 67 may be provided on the end 41 of the connectable covering portion 25 of the temporary rainproof sheet 22 or another temporary rainproof sheet 24, and the vertical waterproof cover 67 may cover the gap in the vertical direction Z between the end 41 and the fascia-shaped waterproof sheet 66. This allows the vertical waterproof cover 67 to prevent rainwater from entering through the gap.

The above work is mainly carried out on construction sites during rainfall.

Then, the temporary rainproof sheet 22 and the other temporary rainproof sheet 24 are removed when the rain stops, collected and reused.

After the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 are removed, roof panels are installed at the construction site in the non-waterproof zone 31, and the roof is completed.

<Effects> The effects of this embodiment are as follows:

(Effect 1) The temporary rainproofing sheet 22 covers the upper edge portion 21 of the upper surface 13 of the building unit 2. In addition, the other temporary rainproofing sheet 24 covers the other upper edge portion 23 of the upper surface 13 of the other building unit 3. This allows the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 to be made smaller and to focus on covering the upper edge portion 21 of the building unit 2 and the other upper edge portion 23 of the other building unit 3. In addition, the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 can provide efficient temporary rainproofing of the upper edge portion 21 and the other upper edge portion 23.

The upper surface 13 of the building unit 2 other than the upper edge portion 21, and the upper surface 13 of the other building unit 3 other than the other upper edge portion 23, can be covered with a waterproof material.

At this time, the building unit 2 and the other building unit 3 are adjacent to each other, and the top edge portion 21 and the other top edge portion 23 are adjacent to each other. The temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 cover the mutually adjacent top edge portion 21 and the other top edge portion 23 of the building unit 2 and the other building unit 3 that is adjacently arranged in a stepped manner with its position shifted from the building unit 2.

The temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 have connectable covering parts 25 at the overlapping part 8 where the upper edge part 21 of the building unit 2 and the other upper edge part 23 of the other building unit 3 overlap. The connectable covering parts 25 cover the overlapping part 8 and are connected to each other. This makes it possible to prevent rainwater from entering between the building units 2 and 3 from the overlapping part 8 by the connectable covering parts 25 of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 that are connected and integrated.

At least one of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 has a non-connected covering portion 26 and a widening portion 27 at the position of the misaligned portion 9 where the upper edge portion 21 and the other upper edge portion 23 do not overlap. As a result, the non-connected covering portion 26 covers the top of the misaligned portion 9, and the widening portion 27 hangs down to cover the upper part of the lower side surfaces 4, 6 of the misaligned portion 9. Therefore, the non-connected covering portion 26 provides temporary rainproofing for the misaligned portion 9, and the widening portion 27 can protect the upper part of the exterior walls 11, 12 installed on the lower side surfaces 4, 6 of the misaligned portion 9 from rainwater. Rainwater that flows down the widening portion 27 is drained from the widening portion 27 to the surface side of the exterior walls 11, 12 installed on the misaligned portion 9.

Therefore, even if the building unit 2 and another building unit 3 are arranged adjacent to each other in a stepped manner with their positions shifted, the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 can protect the periphery of the adjacent upper edge portion 21 and the other upper edge portion 23 from rainwater. Therefore, even if the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 are made small, the impact of the arrangement of the building unit 2 and the other building unit 3 can be reduced.

(Effect 2) At least the other of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 may have an extension 42 at the end 41 that extends toward the widening portion 27 formed on one of them. This allows the extension 42 to bridge the connectable covering portion 25 of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 and the widening portion 27 that is slightly away from the connectable covering portion 25. Rainwater that falls on the connectable covering portion 25 of the temporary rainproofing sheet 22 and the other temporary rainproofing sheet 24 can be guided via the extension 42 to the surface of the widening portion 27 that is slightly away from the overlapping portion 8.

The extension 42 may also have a folded portion 43 that is folded back on the front surface side. This allows the flow of rainwater that has been guided along the extension 42 to the position of the widening section 27, which is slightly away from the overlapping section 8, to be stopped by the folded portion 43 provided on the extension 42. The rainwater stopped by the folded portion 43 changes direction downward at the folded portion 43, and is drained downward along the surfaces of the outer walls 11, 12 provided on the lower side surfaces 4, 6 of the misaligned portion 9. This prevents the rainwater from flowing around to the upper side of the outer walls 11, 12 of the misaligned portion 9.

If the fold-back portion 43 is installed, for example, on the back side of the widening portion 27, the fold-back portion 43 can be hidden by the widening portion 27 and rainwater that has entered the back side of the widening portion 27 can be stopped by the fold-back portion 43.

(Effect 3) The widening portion 27 may be provided with a string portion 51 for fastening. Therefore, the widening portion 27 can be easily fixed to the outside (for example, the building unit 2, another building unit 3, scaffolding, etc.) by the string portion 51. The widening portion 27 can be easily and reliably maintained in a correctly widened state by fastening the string portion 51 to the outside. Therefore, the widening portion 27 can more reliably prevent rainwater from entering the upper part of the exterior walls 11, 12 provided on the lower side surfaces 4, 6 of the misaligned portion 9. In addition, by fastening the widening portion 27 with the string portion 51, the widening portion 27 can be fixed so that it does not turn up or flap due to wind, etc., during temporary storage (flapping prevention).

1. Building 2. Building unit 3. Building unit (another building unit)
8 overlapping portion 9 misaligned portion 21 upper side portion 22 temporary rainproof sheet (upper surface rainproof member)
23 Another upper side portion 24 Another temporary rainproof sheet (upper surface rainproof member)
25 Connectable covering portion 26 Non-connectable covering portion 27 Widening portion 42 Extension portion 43 Folded portion 51 String portion

Claims (3)

A temporary rainproof sheet covering the upper edge of the building unit;
and another temporary rainproofing sheet covering another adjacent upper side portion of another building unit arranged adjacent to the building unit in a stepped manner by shifting the position of the building unit,
The temporary rainproof sheet and the other temporary rainproof sheet have a connectable covering portion at the position of the overlapping portion where the upper side portion and the other upper side portion overlap, the connectable covering portion covering the overlapping portion and connectable and fixed to each other,
A top surface temporary rainproofing structure for a building unit, characterized in that at least one of the temporary rainproofing sheet and the other temporary rainproofing sheet has a non-connected covering portion covering the top of the misaligned portion at a position where the upper edge portion and the other upper edge portion do not overlap, and an expanded portion hanging downward from the non-connected covering portion. The upper surface rainproofing structure of the building unit according to claim 1,
At least the other of the temporary rainproof sheet and the other temporary rainproof sheet has an extension portion at an end portion extending toward the widening portion formed on one of the sheets,
A top surface waterproofing structure for a building unit, characterized in that the extension portion has a folded portion that is folded back to the surface side. The upper surface rainproofing structure of the building unit according to claim 1 or 2,
A temporary rainproofing structure for the upper surface of a building unit, characterized in that the widening portion is provided with a string portion for fastening.