JP2024062630A - Temporary rainproofing material for the upper surface of building units - Google Patents

Abstract

[Problem] To mainly suppress or prevent rainwater from entering the inside of a building unit by using a fascia-shaped waterproof sheet at the end even if the temporary rainproof sheet is made small.
[Solution] The upper surface temporary rainproofing member 5 of the building unit 3 is provided with a temporary rainproofing sheet 12 that covers the upper edge portion 11 of the building unit 3. The temporary rainproofing sheet 12 has a fascia-shaped waterproof sheet 14 at an end portion 13 that hangs down to cover the upper portion of the side surface 6 of the building unit 3. The fascia-shaped waterproof sheet 14 may have a width that covers the upper portion of the side surface 6 of another building unit 3A installed adjacent to the building unit 3. The fascia-shaped waterproof sheet 14 may have a string portion for fastening. The temporary rainproofing sheet 12 may have a standing waterproof cover at the end portion 13 to which the fascia-shaped waterproof sheet 14 is attached, to cover the gap between the end portion 13 and the fascia-shaped waterproof sheet 14.
[Selected figure] Figure 2

Description

This invention relates to a temporary rainproofing member 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 above-mentioned size and shape 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.

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:
Equipped with a temporary rainproof sheet covering the upper edge of the building unit,
The temporary rainproofing sheet is characterized by an upper temporary rainproofing member of the building unit having a fascia-shaped waterproof sheet at its end that hangs down and covers the upper part of the side of the building unit.

According to the present invention, with the above-mentioned configuration, even if the temporary rainproofing sheet is small, the end panel-shaped waterproof sheet can suppress or prevent rainwater from entering the interior of the building unit.

1 is an overall perspective view of a unit building constructed of building units equipped with a top surface waterproofing member according to this embodiment. FIG. 2 is a partial perspective view showing a joint between a building unit having an upper surface waterproofing member of FIG. 1 and another adjacent building unit. FIG. 3 is a partially enlarged perspective view of FIG. 2 showing the periphery of an end portion of the temporary rainproofing sheet. FIG. 3 is a vertical cross-sectional view of the intermediate portion of the temporary rainproofing sheet taken along line AA in FIG. 2. FIG. 4 is a partially enlarged perspective view similar to FIG. 3 of a temporary rainproof sheet having a vertical waterproof cover. FIG. 6 is a partially enlarged perspective view of FIG. 5, seen from a different direction.

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

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

For example, a building 1 as shown in Figure 1 is provided. This building 1 is composed of unit buildings.

A unit building is a building 1 that can be constructed in a short period of time by transporting prefabricated rectangular building units 2 and 3 manufactured in a factory to a construction site, where they are assembled and installed.

The building units 2 and 3 are unit structures that make up a unit building. A unit building becomes a multi-story building 1 by stacking the building unit 3 of the upper floor H on top of the building unit 2 of the lower floor L.

The arrows in the figure indicate the short side direction X of the building units 2 and 3, the long side direction Y of the building units 2 and 3, and the up-down direction Z. The short side direction X, the long side direction Y, and the up-down direction Z are three directions that are mutually perpendicular.

In the unit building shown in the figure, building units 2 and 3 are installed side by side in the short side direction X, so that the short side direction X is the adjacent direction of building units 2 and 3. However, the adjacent direction of building units 2 and 3 may also be the long side direction Y. In this embodiment, the adjacent direction will be described as the short side direction X.

In such building units 2, 3, it is necessary to provide temporary weatherproofing 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 installation of the unit building at the construction site and the completion of the building 1.

For this reason, the building units 2, 3 are shipped in a state where they are protected from rainwater at least during rainfall by attaching upper surface temporary rainproofing members 5 to their upper surfaces 4. The upper surface temporary rainproofing members 5 are attached to the building units 2, 3 between the time the building units 2, 3 are manufactured in the factory and the time the building units 2, 3 are shipped to the construction site.

As described below, the upper surface rainproofing member 5 is mainly attached to the building unit 3 of the upper floor H. Another upper surface rainproofing member (not shown) of a different shape is attached to the building unit 2 of the lower floor L. Note that the upper surface rainproofing member 5 may be attached to the building units 2 and 3 in advance as a rain-weather specification even when it is not raining.

The rectangular building units 2, 3 have four side faces 6, 7 around them. The side faces 6, 7 are vertical faces that make up the outer periphery of the rectangular building units 2, 3. Of these, side face 6 is the face in the short side direction X of the building units 2, 3. Furthermore, side face 7 is the face in the long side direction Y of the building units 2, 3.

Exterior walls 9 and the like are attached to the exterior side surfaces 6, 7 of the building units 2, 3, and the exterior walls 9 provide permanent rainproofing. In addition, temporary rainproofing members for sides (not shown) are attached to the interior side surfaces 6, 7 of the building units 2, 3 instead of the exterior walls 9.

The sides 6 and 7 facing the exterior are those that do not have adjacent building units 2 and 3. In this embodiment, side 6 is primarily facing the exterior. The sides 6 and 7 facing the interior are those that are hidden by the adjacent building units 2 and 3. In this embodiment, side 7 is primarily facing the interior.

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

(1) As shown in FIG. 2, the upper surface waterproofing member 5 of the building unit 3 is
A temporary rainproof sheet 12 may be provided to cover the upper edge portions 10, 11 of the building unit 3.
As shown in the partially enlarged view of FIG. 3, the temporary rainproofing sheet 12 may have a fascia-shaped waterproof sheet 14 at an end 13 thereof that hangs down and covers the upper parts of the side surfaces 6 and 7 of the building unit 3 .

The upper surface temporary waterproofing member 5 of the building unit 3 is a member that covers at least a portion of the upper surface 4 of the building unit 3, providing partial temporary waterproofing to the upper surface 4 of the building unit 3. Temporary waterproofing is a temporary waterproofing that takes place from the time the building unit 3 is shipped until the building 1 is completed at the construction site. Note that the permanent waterproofing that takes place after the building 1 is completed is carried out separately from the temporary waterproofing.

At this time, the building units 3 on the upper floor H (or the top floor) may have waterproof roof panels 15 attached to their upper surfaces 4 in advance at the factory to form roofed building units 3. In this way, a multi-story unit building with most of the roof can be created simply by stacking the building units 3 on the upper floor H on top of the building units 2 on the lower floor L. The remaining part of the roof is finished at the construction site after all the building units 3 on the upper floor H have been installed. The building units 2 on the lower floor L do not have roof panels 15 attached to their upper surfaces 4.

The upper surface waterproofing member 5 of the building unit 3 in this embodiment is primarily attached to the building unit 3 installed on the upper floor H of a unit building, and provides waterproofing for, for example, the portion of the upper surface 4 of the building unit 3 on the upper floor H that does not have a roof panel 15.

The upper surface waterproofing member 5 may be used to waterproof the portion without a waterproof panel (not shown) when a waterproof panel (not shown) other than the roof panel 15 is attached for some purpose to the upper surface 4 of the building unit 2, 3 on the upper floor H or lower floor L. Also, as described above, a different upper surface waterproofing member (not shown) having a different shape from this embodiment is installed on the upper surface 4 of the building unit 2 on the lower floor L.

Details of the above are as follows:

The roof panel 15 installed on the top surface 4 of the building unit 3 on the upper floor H is approximately rectangular in plan view. The roof panel 15 is formed, for example, to be approximately one size smaller than the approximately rectangular top surface 4 of the building unit 3, and is installed approximately in the center of the top surface 4, aligned with the top surface 4 of the building unit 3.

As a result, the central portion of the top surface 4 of the building unit 3 (top central portion) becomes a waterproof zone 16 due to the waterproof roof panel 15. And the peripheral portion of the top surface 4 of the building unit 3 where there is no roof panel 15 (top peripheral portion) becomes a non-waterproof zone 17. The non-waterproof zone 17 is formed along the top peripheral portion of the building unit 3, for example in the shape of a rectangular frame.

When the building unit 3 is to be lifted by a crane at a construction site, etc., space is required at the four corners R of the top surface 4 to attach a lifting device for hanging the crane's hook.

For this reason, the roof panel 15 is formed smaller than the top surface 4 of the building unit 3 so as not to get in the way of the lifting equipment and to avoid damage during lifting. When the roof panel 15 is installed on the top surface 4 of the building unit 3, the four corners R of the top surface 4 of the building unit 3 are exposed to the outside. As there is no roof panel 15 on the top surface 4 of the building unit 3, the parts exposed to the outside become spaces for attaching the lifting equipment and become non-waterproof zones 17.

The upper edge portions 10, 11 are the straight edges 4a (Figure 4) and their surroundings that form the peripheral portion of the rectangular top surface 4 of the rectangular parallelepiped building unit 3, and there are four of them on the top surface 4. Of these, the upper edge portion 10 is the periphery of the edge 4a in the short side direction X of the building units 2, 3. The upper edge portion 11 is the periphery of the edge 4a in the long side direction Y of the building unit 3.

As described above, when the smaller roof panel 15 is installed in the center of the top surface of the building unit 3, the four upper edge portions 10, 11 basically all become non-waterproof zones 17. In this case, the upper surface waterproofing member 5 is attached to some or all of the upper edge portions 10, 11 that become the non-waterproof zones 17.

In this embodiment, at least the side 4a located on the indoor side where the building units 3 are adjacent and the surrounding upper edge portion 11 are considered to be a non-waterproof zone 17. In addition, the upper edge portion 11 on the opposite outdoor side is also considered to be a non-waterproof zone 17. The upper surface rainproofing member 5 is attached to at least one of the above-mentioned upper edge portions 11. In this embodiment, the upper surface rainproofing member 5 is attached to at least the upper edge portion 11 where the adjacent building units 3 are located.

However, depending on the shape of the roof panel 15 and how the roof panel 15 is installed on the top surface 4 of the building unit 3, it is possible to directly cover some of the upper edge portions 10, 11 with the roof panel 15 to create a waterproof zone 16. For example, by extending the above-mentioned roof panel 15 to reach one of the sides 4a of the top surface 4 or to a length that exceeds the side 4a, the side 4a is covered by the extended part of the roof panel 15 and becomes the waterproof zone 16.

For example, by extending the roof panel 15 in the long side direction Y, the upper edge portion 10 becomes the waterproof zone 16. This allows the upper edge portion 10 to be in a state where the upper surface rainproofing member 5 can be attached or not attached. Therefore, in this embodiment, the upper edge portion 10 does not have the upper surface rainproofing member 5 attached.

The sides 6 and 7 (side 7 in this embodiment) of the building units 3 that are below the upper edge 11 where the building units 3 are adjacent to each other face indoors and are hidden from the outside. The sides 6 and 7 (side 6 in this embodiment) of the building units 3 that are below the upper edge 10 that is perpendicular to (or adjacent to) the upper edge 11 face outdoors and have an exterior wall 9 attached to them.

The temporary rainproof sheet 12 is a waterproof resin sheet. The temporary rainproof sheet 12 is attached to the upper edge parts 10, 11 (in this embodiment, the upper edge part 11) which are the non-waterproof zone 17 of the building unit 3, and is a waterproof sheet that provides temporary rainproofing to the non-waterproof zone 17. This makes the temporary rainproof sheet 12 a small one that is installed on a part of the upper surface 4 of the building unit 3.

Then, as described above, the temporary rainproofing sheet 12 is installed on at least one or more upper edge portions 10, 11 of the building unit 3 of the upper floor H. The temporary rainproofing sheet 12 is in the form of a long, narrow strip having a width and length equal to or greater than the non-waterproof zone 17 of at least the upper edge portions 10, 11 to be installed, so that it can cover the entire area that is the non-waterproof zone 17 of the upper edge portions 10, 11 to be installed.

For the sake of simplicity, the following description will be given assuming that the temporary rainproof sheet 12 is installed on the upper edge portion 11. If the temporary rainproof sheet 12 is installed on the upper edge portion 10, the upper edge portion 11 below will be referred to as the upper edge portion 10, and other necessary substitutions will be made as appropriate.

The width of the non-waterproof zone 17 is the distance from the edge 4a of the top surface 4 of the building unit 3 to the edge 15a (Figure 4) on the same side of the roof panel 15, and is approximately constant over the entire length of the non-waterproof zone 17. The length of the non-waterproof zone 17 is the same dimension as the edge 4a of the top surface 4 of the building unit 3.

As shown in FIG. 4, the temporary rainproofing sheet 12 has one widthwise side 12a fixed from above to the edge 15a of the roof panel 15 with fasteners 18 such as screws, and is spread over the top edge 11 to cover the entire non-waterproof zone 17 of the top edge 11. In addition to the main body portion that covers the top edge 11, the temporary rainproofing sheet 12 may have a screw cover 12b that is folded over on one side 12a.

After one side 12a of the temporary rainproof sheet 12 is fixed to the edge 15a of the roof panel 15 with a screw (fixing device 18), the screw cover 12b is folded up. Then, the screw cover 12b folded up is placed on top of the one side 12a, covering at least a part of the one side 12a of the temporary rainproof sheet 12 and the main body. In this way, the screw cover 12b protects the screw-fixed part of the one side 12a from above and waterproofs it. The screw cover 12b can fulfill its main function as long as it is wide enough to cover the screw-fixed part of the one side 12a, but it may be made much wider than that. After folding, the screw cover 12b may be removably attached to an appropriate position (for example, the end 13) of the main body of the temporary rainproof sheet 12 using a hook or other attachment/detachment means to prevent it from flapping.

The temporary rainproofing sheet 12 is preferably formed so that the other side 12c in the width direction reaches the position of the side 4a that forms the upper edge portion 11 on the upper surface 4 of the building unit 3, or is formed with a width that exceeds the side 4a. The part of the other side 12c of the temporary rainproofing sheet 12 that exceeds the side 4a of the upper surface 4 of the building unit 3 may be hung over the upper part of the lower side 6, 7 (in this embodiment, side 7; hereafter, it will be described as side 7) of the upper edge portion 11 of the building unit 3, for example, when the building unit 3 is being transported, to cover the upper part of the side 7 of the building unit 3.

As shown in FIG. 3, the ends 13 of the temporary rainproof sheet 12 are portions located at both ends of the temporary rainproof sheet 12 in the longitudinal direction (long side direction Y in this embodiment). The ends 13 reach above the corners R of the upper surface 4 of the building unit 3 or extend beyond the corners R to cover the corners R. The temporary rainproof sheet 12 may be provided with string members 13a or the like at the ends 13 for fastening the ends 13 of the temporary rainproof sheet 12 to external scaffolding or the like.

Hanging downward means that when the fascia-shaped waterproof sheet 14 is attached to the end 13 of the temporary rainproof sheet 12, the fascia-shaped waterproof sheet 14 hangs down due to its own weight, etc., and the surface becomes vertical.

The sides 6, 7 (side 6 in this embodiment; hereafter referred to as side 6) of the building unit 3 are the lower surfaces of another upper edge portion 10 that is perpendicular (or adjacent) to the upper edge portion 11 on which the temporary rainproofing sheet 12 is installed. Note that when a fascia-shaped waterproof sheet 14 is installed on side 7, side 6 will become side 7, and any other necessary substitutions will be made as appropriate.

The upper part of the side 6 is the non-waterproof zone 17 directly below the end 13 of the temporary rainproofing sheet 12 on the side 6 below the upper edge 10 and its surrounding area. Since the exterior wall 9 is attached to the side 6, the upper part of the side 6 becomes the corner part of the upper edge of the exterior wall 9.

The fascia-shaped waterproof sheet 14 is a fascia-shaped waterproof sheet that is provided on the outside of the upper part of the side surface 6 of the building unit 3 and extends horizontally along the upper part of the side surface 6. The fascia-shaped waterproof sheet 14 partially covers the upper part of the side surface 6 horizontally along the upper edge of the side surface 6. As a result, the fascia-shaped waterproof sheet 14 is installed on the outside of the exterior wall 9 and covers the corners of the upper edge of the exterior wall 9. The fascia-shaped waterproof sheet 14 may be made of the same material as the temporary rainproof sheet 12.

The fascia-shaped waterproof sheet 14 is attached to one or both longitudinal ends 13 of the temporary rainproof sheet 12. The fascia-shaped waterproof sheet 14 may have, for example, legs 14a connected to the ends 13 of the temporary rainproof sheet 12 and arms 14b extending laterally to cover the upper part of the side surface 6 of the building unit 3.

The fascia-shaped waterproof sheet 14 may be formed as an integral extension of the end 13 of the temporary rainproof sheet 12, or may be formed as a separate member and attached to the end 13 of the temporary rainproof sheet 12. When the fascia-shaped waterproof sheet 14 is a separate member, the legs 14a of the fascia-shaped waterproof sheet 14 may be attached to the underside of the end 13 of the temporary rainproof sheet 12.

The legs 14a may be fixed to the underside of the end 13 of the temporary rainproofing sheet 12 by, for example, an integration means such as sewing, adhesive, or adhesive tape, or may be removably attached using an attachment/detachment means such as a hook-and-loop fastener or a hook and eye.

(2) The fascia-shaped waterproof sheet 14 may have a width 21 that covers the upper part of the sides 6, 7 (in this case, side 6) of another building unit 3A installed adjacent to the building unit 3.

Here, the other building unit 3A is a subsequent building unit 3 (subsequent unit or second building unit) that is installed next to the previously installed building unit 3 (preceding unit or first building unit) on the upper floor H of the building 1. Note that when three or more building units 3 are installed next to each other, the preceding unit and the subsequent unit are relative to each other.

The other building unit 3A (subsequent unit) has a basic structure similar to that of the building unit 3 (preceding unit), and is a rectangular parallelepiped of approximately the same size and shape. In the following explanation, if there is any confusion, the subsequent unit may be indicated by adding an A to its reference number to distinguish it from the preceding unit.

The previously installed building unit 3 and another building unit 3A are placed adjacent to each other with a slight gap 22 between their opposing sides 7. The opposing side 7 faces the interior side and is hidden inside the building 1.

A gap 22 is also formed between the adjacent upper edge portions 11, 11A of the building unit 3 and another adjacent building unit 3A. The gap 22 extends in a horizontal direction (long side direction Y in this embodiment) perpendicular to the direction in which the building unit 3 and the other building unit 3A adjoin (short side direction X in this embodiment). Note that it is preferable to provide the legs 14a of the fascia-shaped waterproof sheet 14 at or near the gap 22 so that the gap 22 can be sufficiently covered.

A temporary rainproofing sheet 12 is installed on at least the upper edge 11 of the building unit 3 on the side adjacent to another building unit 3A so as to cover the upper edge 11 from above.

In addition, another temporary rainproofing sheet 12A (or a second temporary rainproofing sheet) is installed on at least the upper edge portion 11A of the other building unit 3A on the side adjacent to the building unit 3, covering the upper edge portion 11A from above. The above-mentioned upper edge portion 11A of the other building unit 3A has a shape, structure, and positional relationship that is the opposite of the upper edge portion 11 of the building unit 3. Therefore, the other temporary rainproofing sheet 12A can be used by reversing the shape and structure of the temporary rainproofing sheet 12 as desired. The other temporary rainproofing sheet 12A is in the form of a long, thin strip and extends almost along the upper edge portion 11A (in the long side direction Y).

The other temporary rainproof sheet 12A may have a slightly different shape and structure from the temporary rainproof sheet 12. For example, in this embodiment, the temporary rainproof sheet 12 and the other temporary rainproof sheet 12A are configured so that the other side portions 12c of the sheet can be connected and separated by a fastener or other fastener 23. The fastener is attached to the other side portions 12c of the temporary rainproof sheet 12 and the other temporary rainproof sheet 12A so as to extend over almost the entire length of the other side portions 12c. The fastener may be attached with a string 23a (Fig. 2) so that it can be manually operated remotely from the opposite end portion 13.

In this way, by connecting the temporary rainproofing sheet 12 and another temporary rainproofing sheet 12A with the connector 23 and integrating them, the gap 22 between the building unit 3 and the other building unit 3A can be effectively waterproofed.

In this case, the temporary rainproof sheet 12 and the other temporary rainproof sheet 12A only need to be wide enough to effectively cover the space between the building unit 3 and the other building unit 3A when connected. For this reason, the temporary rainproof sheet 12 and the other temporary rainproof sheet 12A are slightly different in shape and structure from each other.

In other words, by installing fasteners or other connectors 23 at a high position, rainwater is less likely to accumulate in the fastener area, making it easier to prevent rainwater from leaking from the fastener area. For this reason, the fasteners are installed, for example, in a position close to the roof panel 15 of another building unit 3A.

The temporary rainproof sheet 12 is therefore made wide so that the other side 12c reaches a position close to the roof panel 15 of the other building unit 3A. In contrast, the other temporary rainproof sheet 12A is made narrow so that the other side 12c reaches a position close to the roof panel 15 of the other building unit 3A. And, the screw cover 12b of the other temporary rainproof sheet 12A is made wide enough to extend beyond the position of the fastener, so that it can cover the fastener from above and protect the fastener from rainwater.

In addition, in the non-waterproof zone 17, an auxiliary waterproof sheet 24 is installed under the temporary rainproof sheet 12 and the other temporary rainproof sheet 12A. This auxiliary waterproof sheet 24 can also be used alone for temporary rainproofing.

One side of the auxiliary waterproof sheet 24 is fastened together with one side 12a of the temporary rainproof sheet 12 to the edge 15a of the roof panel 15 with a fastener 18 such as a screw, and the other side is hung over the upper part of the side surface 7 on the indoor side that constitutes the gap 22. The other side of the auxiliary waterproof sheet 24 protects the upper part of the side surface 7 on the indoor side from rainwater. The auxiliary waterproof sheet 24 can be left as it is after the temporary rainproofing, and used for the main rainproofing. The end of the auxiliary waterproof sheet 24 that protrudes from the upper side 11 may be folded back toward the upper side 10 so that it is sandwiched between the upper side 10 and the fascia-shaped waterproof sheet 14.

The side surface 6A of the other building unit 3A is aligned in the adjacent direction (short side direction X in this embodiment) with the side surface 6 covered by the fascia-shaped waterproof sheet 14 of the building unit 3, and is a surface that is almost flush with the side surface 6 of the building unit 3. The side surface 6A of the other building unit 3A is installed in alignment with the side surface 6 of the building unit 3 in the long side direction Y. The mating gap 22 between the side surface 6 of the building unit 3 and the side surface 6A of the other building unit 3A is sealed by filling the joint portion formed between the opposing side edges of the exterior wall 9 with a gasket or a filler for on-site application.

The upper part of side 6A is the non-waterproof zone 17 and its surrounding area adjacent to side 6 of building unit 3, above side 6A of another building unit 3A. Since an exterior wall 9 is attached to side 6A, the corner of the upper edge of exterior wall 9 becomes the upper part of side 6A. A fascia-shaped waterproof sheet 14 is installed on the outside of exterior wall 9 and covers the corner of the upper edge of exterior wall 9 horizontally.

The width 21 is the dimension in the horizontal direction (adjacent direction) of the arm portion 14b of the fascia-shaped waterproof sheet 14. The width 21 of the fascia-shaped waterproof sheet 14 should at least exceed the non-waterproof zones 17 on both sides. The width 21 of the fascia-shaped waterproof sheet 14 may be a length close to or almost reaching the bracket 25 closest to the gap 22 among the multiple brackets 25 provided on the upper part of the building unit 3 and the separate building unit 3A. The bracket 25 may be a member that holds a rain gutter (a gutter holding member), etc. The brackets 25 that hold the rain gutter are installed in large numbers at the required intervals along the upper part of the building unit 3 and the separate building unit 3A.

As a result of the above, the fascia-shaped waterproof sheet 14 becomes roughly inverted T-shaped with legs 14a and arms 14b of width 21 that span between different building units 3A.

If the fascia-shaped waterproof sheet 14 does not cover the upper part of the side surface 6A of another building unit 3A, the fascia-shaped waterproof sheet 14 may be L-shaped or I-shaped.

The fascia-shaped waterproof sheet 14 may be provided at the end 13 of either the temporary rainproof sheet 12 or the separate temporary rainproof sheet 12A. In this embodiment, the fascia-shaped waterproof sheet 14 is attached to the end 13 on the side of the wider temporary rainproof sheet 12.

The fascia-shaped waterproof sheet 14 can also be attached to another temporary rainproof sheet 12A. In this case, the fascia-shaped waterproof sheet 14 can be formed as an integral extension to the end 13 of the other temporary rainproof sheet 12A, or it can be formed as a separate member and attached to the end 13 of the other temporary rainproof sheet 12A. When it is a separate member, the legs 14a of the fascia-shaped waterproof sheet 14 can be attached to the underside of the end 13 of the other temporary rainproof sheet 12A.

The legs 14a may be fixed to the underside of the end 13 of another temporary rainproofing sheet 12A by, for example, an integration method such as sewing, glue, or adhesive tape, or may be removably attached using an attachment/detachment method such as a hook-and-loop fastener or a hook.

(3) The fascia-shaped waterproof sheet 14 may be provided with a string portion 31 for fastening.

Here, the string portion 31 is a long, thin, flexible cord-like member. The apron-shaped waterproof sheet 14 has string holes 32 at least at both ends (e.g., at the upper positions) in the width direction of the arm portion 14b. The string portion 31 is tied to the apron-shaped waterproof sheet 14 by passing it through the string holes 32 or through a ring-shaped member 33 attached to the string holes 32. The string holes 32 may have protective grommets attached to their edges.

The string portion 31 may have a suitable length sufficient to tie at least both ends of the arm portion 14b of the fascia-shaped waterproof sheet 14, for example, to the bracket 25.

The string portion 31 may be tied, for example, to other parts of the building unit 3 and other building units 3A, external scaffolding, etc., in addition to the bracket 25 that holds the rain gutter.

The string member 13a at the end 13 of the temporary rainproof sheet 12 may have a configuration similar to the string hole 32 and ring-shaped member 33 of the string portion 31.

(4) As shown in FIG. 5, the temporary rainproofing sheet 12 may have a standing waterproof cover 42 at the end 13 to which the fascia-shaped waterproof sheet 14 is attached, which covers the gap 41 between the end 13 and the fascia-shaped waterproof sheet 14.

Here, as shown in FIG. 4, the gap 41 is formed in the upper edge portion 11 mainly due to the height difference 43 between the roof panel 15 in the center of the upper surface of the building unit 3 and the upper surface 4 of the building unit 3.

In other words, because the roof panel 15 has a thickness, by attaching the roof panel 15 to the center of the top surface of the building unit 3, a height difference 43 equal to the thickness of the roof panel 15 is created between the center of the top surface of the building unit 3 and the top edge 11, which remains at the same height as the top surface 4. Then, by fixing one side portion 12a in the width direction of the temporary rainproof sheet 12 to the higher edge portion 15a of the roof panel 15, the height difference 43 also affects the temporary rainproof sheet 12 covering the top edge portion 11.

Here, we will briefly explain the roof panel 15. The roof panel 15 has a structure in which a pair of parallel roof frames 44 on the left and right are connected with a roof underlayment 45 and then covered with a waterproof roof finish material 46. The roof underlayment 45 may be topped with a solar panel 47 or the like.

The roof frame 44 is a metal member shaped like an inward C. The inward C-shaped roof frame 44 has a vertical web portion, a horizontal upper flange portion formed integrally with the upper end of the web portion, and a horizontal lower flange portion formed integrally with the lower end of the web portion.

The edge 15a of the roof panel 15, which forms the boundary between the waterproof zone 16 and the non-waterproof zone 17, is made into the web of the roof frame 44. The edge 15a of the roof panel 15 to which one side 12a of the temporary rainproofing sheet 12 is attached is made into the approximately horizontal upper flange of the roof frame 44.

The roof underlayment 45 is attached to the roof frame 44 via guide rail members 48. Attached to the outer surface of the roof frame 44 (its web portion) are sheathing beams 49 that are used to finish the rest of the roof.

The main body of the temporary rainproofing sheet 12 installed in the non-waterproof zone 17 is highest in the width direction because one side 12a is attached to the roof panel 15, and the other parts are lower than that, covering the non-waterproof zone 17.

Specifically, the main body of the temporary rainproofing sheet 12 is formed as a nearly horizontal top 51 at the portion resting on the upper flange of the roof frame 44 and the sheathing support beam 49 of one side 12a. The main body of the temporary rainproofing sheet 12 is formed as a step shape with a steeply sloping portion 52 extending downward from the top 51 and a bottom surface portion 53 covering the top edge portion 11 of the top surface 4 of the building unit 3, which are formed in sequence toward the other side 12c.

Furthermore, before being connected with fasteners or other fasteners 23, the other side portion 12c hangs down over the sides 6 and 7 of the building unit 3. Therefore, the temporary rainproof sheet 12 is formed with a width that takes into account deformation due to the height difference 43. The other temporary rainproof sheet 12A is narrower than the temporary rainproof sheet 12, and its width reaches up to a part of the steeply inclined portion 52.

Then, the temporary rainproof sheet 12 and another temporary rainproof sheet 12A, which has a shape that is almost the opposite of the left and right, are connected together with a connector 23 to form a groove-shaped drainage channel. At this time, the other side portion 12c of the temporary rainproof sheet 12 is raised from the bottom portion 53 and connected to the other temporary rainproof sheet 12A so that it is at the bottom of the steeply inclined portion 52 on the opposite side. Rainwater flows along the bottom portion 53 of this groove-shaped drainage channel and is drained from the end portion 13. The rainwater drained from the end portion 13 flows down the surface of the side surface 6 on the outdoor side.

As shown in FIG. 6, the standing waterproof cover 42 is an auxiliary member that closes the gap 41 in the vertical direction Z caused by the height difference 43. The standing waterproof cover 42 may be formed as an integral extension to the end 13 of the temporary rainproof sheet 12 or another temporary rainproof sheet 12A, or may be formed as a separate member and attached to the end 13 of the temporary rainproof sheet 12 or another temporary rainproof sheet 12A.

When the vertical waterproof cover 42 is formed integrally, the vertical waterproof cover 42 may extend from, for example, the screw cover 12b. The vertical waterproof cover 42 may extend from, for example, all or part of the top 51 or steeply inclined portion 52 of the main body of the temporary rainproofing sheet 12.

When the vertical waterproof cover 42 is a separate body, it may be attached to the underside of the end 13 of the temporary rainproof sheet 12 or another temporary rainproof sheet 12A. In this case, the attachment position of the vertical waterproof cover 42 is the screw cover 12b, the uppermost part 51 of the main body part, or all or part of the steeply inclined part 52, etc. The vertical waterproof cover 42 may be fixed integrally to the underside of the end 13 of the temporary rainproof sheet 12 or another temporary rainproof sheet 12A by, for example, sewing, adhesive, or adhesive tape, or may be attached removably using hook-and-loop fasteners, hooks, etc.

The vertical waterproof cover 42 may be formed to a width that can cover the required portion between the side of the leg 14a of the fascia-shaped waterproof sheet 14 and the end (tip) in the width direction of the arm 14b. In this embodiment, the vertical waterproof cover 42 is wide enough to cover the range from the side of the leg 14a to approximately the position of the edge 15a of the roof panel 15 (the position of one side 12a of the end 13 of the temporary rainproof sheet 12 or another temporary rainproof sheet 12A).

The standing waterproof cover 42 is extended to a length that almost reaches the lower edge of the arm 14b of the apron-shaped waterproof sheet 14 or a length longer than that, and is layered on the outer surface of the arm 14b. The standing waterproof cover 42 is removably attached to the lower edge of the arm 14b of the apron-shaped waterproof sheet 14 using fasteners 56 such as hooks, so that it will not be turned over by wind, etc.

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

The building unit 3 for the upper floor H is manufactured in a factory. At this time, a waterproof roof panel 15 is attached to the center of the top surface of the building unit 3 for the upper floor H. Then, a temporary rainproof sheet 12 is attached to the necessary parts of the upper edge portions 10, 11 of the building unit 3 (for example, at least the upper edge portion 11). As a result, the upper surface 4 of the building unit 3 is waterproofed at the center of the top surface by the roof panel 15, and the upper edge portions 10, 11 without the roof panel 15 are temporarily rainproofed by the temporary rainproof sheet 12.

Then, at the construction site, the building unit 3 for the upper floor H is installed on top of the building unit 2 for the lower floor L. The building unit 3 for the upper floor H has a roof panel 15 on its upper surface 4, so that most of the roof of the unit building is directly formed by the installation of the building unit 3.

Next, another building unit 3A on the upper floor H is installed next to the building unit 3 on the upper floor H. The other building unit 3A has a roof panel 15 attached to the center of the top surface, and a temporary rainproof sheet 12 attached to at least the upper edge portion 11A.

After the installation of another building unit 3A on the upper floor H, the temporary rainproofing sheet 12 of the building unit 3 and the other temporary rainproofing sheet 12A of the other building unit 3A are connected with a fastener to be integrated. As a result, the joint gap 22 between the adjacent upper edge parts 11, 11A of the building unit 3 and the other building unit 3A is waterproofed by the connected temporary rainproofing sheet 12 and the other temporary rainproofing sheet 12A.

Then, a fascia-shaped waterproof sheet 14 is attached to the end 13 of the temporary rainproof sheet 12 so as to hang down, and covers the upper part of the side 6, 6A of the building unit 3 and the other building unit 3A from the outside. In this way, the fascia-shaped waterproof sheet 14 prevents rainwater from entering the interior of the building unit 3 and the other building unit 3A from the upper part of the side 6, 6A of the building unit 3 and the other building unit 3A.

The fascia-shaped waterproof sheet 14 is held in a horizontally spread state by tensioning it with the fastening strings 31. The fastening strings 31 are fastened to the nearest of the multiple brackets 25 installed along the top of the building unit 3 and another building unit 3A to hold the rain gutters, for example.

The gap 41 in the vertical direction Z formed between the end 13 of the temporary rainproofing sheet 12 and the fascia-shaped waterproof sheet 14 is covered by a vertical waterproof cover 42. This prevents rainwater from entering through the gap 41.

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

(Effect 1) The temporary rainproof sheet 12 covers the upper edge 11 of the building unit 3, preventing rainwater from entering from the upper edge 11. By making the temporary rainproof sheet 12 large enough to cover the upper edge 11 of the building unit 3, the temporary rainproof sheet 12 can be made compact, and the upper edge 11, which is the non-waterproof zone 17 on the top surface 4 of the building unit 3, can be protected from rainwater in a focused manner.

In this case, if the temporary rain-proofing sheet 12 is made small, there is a risk that some parts may not be covered adequately by the temporary rain-proofing sheet 12 alone. Therefore, the temporary rain-proofing sheet 12 is provided with a fascia-shaped waterproof sheet 14 at the end 13. Therefore, even if the temporary rain-proofing sheet 12 is made small, the temporary rain-proofing sheet 12 has a fascia-shaped waterproof sheet 14 at the end 13 that hangs downward, so that the fascia-shaped waterproof sheet 14 can cover parts that cannot be covered adequately by the temporary rain-proofing sheet 12 alone. The fascia-shaped waterproof sheet 14 also prevents rainwater from entering from the side onto the upper part of the side surface 6 of the building unit 3.

(Effect 2) The fascia-shaped waterproof sheet 14 may have a width 21 that covers the upper part of the side surface 6A of another building unit 3A installed adjacent to the building unit 3. This allows the fascia-shaped waterproof sheet 14 to simultaneously cover the upper part of the side surface 6 of the building unit 3 and the upper part of the side surface 6A of the adjacent building unit 3A with one sheet of sheet. Therefore, the fascia-shaped waterproof sheet 14 effectively prevents rainwater from entering between the upper part of the side surface 6 of the building unit 3 and the upper part of the side surface 6A of the other building unit 3A.

(Effect 3) The fascia-shaped waterproof sheet 14 may be provided with a string portion 31 for fastening. The fascia-shaped waterproof sheet 14 can be easily and reliably held in a correctly spread-out state by fastening the string portion 31, for example, to a bracket 25 installed on the upper part of the building unit 3. Therefore, the fascia-shaped waterproof sheet 14 can more reliably prevent rainwater from entering the upper part of the side surfaces 6, 7 of the building unit 3. In addition, by fastening the fascia-shaped waterproof sheet 14 with the string portion 31, the fascia-shaped waterproof sheet 14 can be prevented from being turned up or flapping due to wind or the like during temporary storage (flapping prevention).

(Effect 4) The temporary rainproof sheet 12 may have a vertical waterproof cover 42 at the end 13 to which the fascia-shaped waterproof sheet 14 is attached. The vertical waterproof cover 42 covers the gap 41 in the vertical direction Z between the end 13 of the temporary rainproof sheet 12 and the fascia-shaped waterproof sheet 14, thereby preventing rainwater from entering through the gap 41. The vertical waterproof cover 42 is preferably provided at the end 13 of the temporary rainproof sheet 12 when the end 13 has a portion where the shape of the temporary rainproof sheet 12 changes in the width direction (e.g., a step portion, etc.). As a result, the vertical waterproof cover 42 effectively covers the gap 41 that is formed in the portion where the shape of the temporary rainproof sheet 12 changes in the width direction (e.g., a step portion, etc.), preventing rainwater from entering through the gap 41.

3 Building unit 3A Another building unit 5 Top surface temporary rainproofing member 6 Side 6A Side 7 Side 11 Top edge portion 11A Top edge portion 12 Temporary rainproofing sheet 12A Another temporary rainproofing sheet 13 End portion 14 Skirt board-shaped waterproof sheet 21 Width 31 String portion 41 Gap 42 Downward waterproof cover

Claims (4)

Equipped with a temporary rainproof sheet covering the upper edge of the building unit,
The temporary rainproofing sheet is a top surface temporary rainproofing member for a building unit, characterized in that the end portion has a fascia-shaped waterproof sheet that hangs downward and covers the upper portion of the side of the building unit. 2. The upper surface waterproofing member of the building unit according to claim 1,
The top surface temporary waterproofing member of a building unit is characterized in that the fascia-shaped waterproof sheet has a width sufficient to cover the upper part of the side of another building unit installed adjacent to the building unit. 3. The upper surface waterproofing member of the building unit according to claim 2,
The top surface temporary rainproofing component of a building unit is characterized in that the above-mentioned fascia-shaped waterproof sheet is provided with a string portion for fastening. The upper surface waterproofing member of the building unit according to claim 2 or 3,
The temporary rainproofing sheet is an upper surface temporary rainproofing component of a building unit, characterized in that the end portion to which the fascia-shaped waterproof sheet is attached has a vertical waterproof cover that covers the gap between the end portion and the fascia-shaped waterproof sheet.