JP2021195781A - Balcony drainage structure - Google Patents

Abstract

To prevent water from various paths from collecting in an eaves gutter at once.SOLUTION: In a balcony drainage structure, a secondary gutter 41 is provided along an eaves portion 7 of a balcony 2. A box gutter 42 is installed inside the secondary gutter 41 while floating from the secondary gutter 41. A vertical gutter 44 is attached to a downspout 43 provided in the secondary gutter 41. A drainage member 47, which is inserted and arranged with a gap 46 to the vertical gutter 44, is attached to a downspout 45 on the box gutter 42. The secondary gutter 41 may be installed on the downstream side of a tarpaulin 52, which constitutes a floor 5 of the balcony 2, so as to connect with the tarpaulin 52. The box gutter 42 may be installed on the downstream side of a finishing steel sheet 53, which constitutes the floor 5, so as to connect with the finishing steel sheet 53.SELECTED DRAWING: Figure 4

Description

The present invention relates to a balcony drainage structure.

Some buildings such as houses have balconies installed. The balcony needs to be provided with a drainage structure for rainwater and the like, and such a balcony drainage structure has a single eaves gutter along the eaves portion of the balcony (for example, Patent Document). See 1).

Japanese Unexamined Patent Publication No. 8-39704

However, in the case of a balcony drainage structure in which a single eaves gutter is provided along the eaves of the balcony, water from various routes will flow into the eaves gutters, so water gathers in the eaves gutters at once. At times, there was a risk of exceeding the drainage capacity of the eaves gutter.

Therefore, the main object of the present invention is to contribute to the improvement of the above-mentioned problems.

In response to the above problems, the present invention
A secondary gutter is set up along the eaves of the balcony,
Inside the secondary gutter, a box gutter was installed while floating from the secondary gutter.
A vertical gutter is attached to the drop opening provided in the secondary gutter, and at the same time,
The drop opening provided in the box gutter is characterized by a balcony drainage structure in which a drainage member inserted and arranged with a gap with respect to the vertical gutter is attached.

According to the present invention, it is possible to prevent rainwater and water from collecting in the eaves gutter at once from various routes by the above configuration.

It is a top view of a unit building in which a building unit and a balcony unit are arranged side by side. It is a vertical sectional view of the balcony unit of FIG. 1 which has the balcony drainage structure which concerns on this embodiment. It is a vertical cross-sectional view which looked at the downstream side part of the balcony drainage structure of FIG. 2 from the eaves side to the eaves side. It is a partially enlarged vertical sectional view of FIG. It is a perspective view of the floor board of a balcony. It is an enlarged vertical sectional view which shows the relationship between a secondary gutter and a box gutter. It is a figure which shows the finished steel plate which constitutes a floor board. Of these, (a) is a plan view and (b) is an end view. It is a perspective view which shows the state which the secondary gutter is attached to the floor of a balcony. It is a partially enlarged vertical sectional view which shows the state of mounting of a secondary gutter. It is an exploded perspective view which shows the structure of the downspout part. It is an exploded perspective view which shows the state which attaches the downspout to the secondary gutter. It is an exploded side view which shows the state which the drainage receiving member is attached to the secondary gutter. It is a perspective view which shows the state which cuts a strainer from a drainage receiving member attached to a secondary gutter. It is a perspective view which shows the state which the box gutter is attached to the floor of a balcony. It is a partially enlarged vertical sectional view which shows the state of mounting of a box gutter. It is an exploded perspective view which shows the state which the drainage member is attached to the box gutter. It is an exploded side view which shows the state which the drainage member is attached to the box gutter. It is a vertical sectional view of the balcony unit which corresponds to a comparative example.

Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 18 are for explaining this embodiment.

<Structure> Hereinafter, the configuration of this embodiment will be described.

As shown in FIG. 1, a balcony 2 is installed in a building 1 such as a house. Here, the building 1 such as a house may have any structure, but may be, for example, a unit building. The unit building is a building 1 that can be constructed in a short period of time by transporting the building unit 3 manufactured in the factory to the construction site in advance and assembling it at the construction site.

When the building 1 is a unit building, the balcony 2 is preferably a balcony unit 4. The balcony unit 4 is manufactured in advance at the factory. Then, by transporting the balcony unit 4 to the construction site and arranging it in parallel with the building unit 3 at the construction site, the balcony 2 can be installed at once on the unit building. The balcony unit 4 has a floor portion 5 and a handrail wall portion 6 surrounding the floor portion 5.

As shown in the vertical sectional view of FIG. 2, the balcony unit 4 is installed on the building unit 3 (B) on the lower floor while being installed on the building unit 3 (A) on the lower floor. It is installed side by side in the building unit 3 on the floor.

The floor portion 5 of the balcony unit 4 has a drainage gradient that gently descends from the side (eaves side) of the building unit 3 on the upper floor to the opposite side (eaves side). In this embodiment, the balcony unit 4 has an eaves portion 7 on the eaves side, which projects outward from the building unit 3 on the lower floor.

The eaves portion 7 of the balcony unit 4 is provided with an eaves gutter 8 along the extending direction (direction perpendicular to the paper surface) of the eaves portion 7 of the balcony 2, and the eaves gutter 8 is used to drain the balcony 2. A structure (balcony drainage structure) is formed. The eaves gutter 8 is installed under the floor portion 5 so as to be hidden from the outside. The eaves gutter 8 is installed with a drainage gradient that descends from one end side (upstream side) to the other end side (downstream side) of the eaves portion 7 of the balcony 2 in the extending direction.

The floor portion 5 of the balcony unit 4 has a floor plate 18 installed on the floor frames 15 and 16 composed of the floor beams 11 and 12 and the floor beams 13 and 14 via the floor joists 17. ing. The floor plate 18 is fixed to the floor joists 17 from top to bottom with a fixing member such as a nail. In this embodiment, the floor beams 11 and 12 and the floor beams 13 and 14, respectively, are configured so that the upper part of the building unit 3 on the lower floor and the eaves part 7 form two floor frames 15 and 16. It is provided separately.

In this embodiment, the floor beam 14 provided at the lower part of the eaves portion 7 of the balcony unit 4 has a smaller height dimension than the floor beam 13 provided on the upper side of the building unit 3 (A) on the lower floor. The floor joist 17 is attached to the upper part of the floor beam 14 of the eaves portion 7 via the spacer 19.

On the other hand, the handrail wall portion 6 of the balcony unit 4 is located between the plurality of pillar portions 21 erected from the floor beams 12 on the eaves side constituting the eaves portion 7 of the floor portion 5 and the upper ends of the plurality of pillar portions 21. A connecting member 22 connecting the balcony 2 in the extending direction of the eaves portion 7, a cap tree 23 covering the connecting member 22 from above, and a handrail rod 25 attached to the upper side of the cap tree 23 via a short pillar 24. Have.

The inner wall material 26 is attached to the inner surface side of the handrail frame portion formed by the floor beam 12 on the eaves side, the pillar portion 21, and the connecting member 22, and the outer wall material 27 is attached to the outer surface side of the handrail frame portion. , Consists of the handrail wall portion 6 described above.

Further, in the eaves portion 7 of the floor portion 5, the eaves ceiling material 32 is installed under the floor beam 14 via the eaves ceiling mounting bracket. The eaves ceiling material 32 is a face material that hides the lower side of the eaves portion 7. The lower part of the outer wall material 27 is formed to have a length that substantially reaches the position of the lower part of the floor beam 12 on the eaves side, and is between the lower part of the outer wall material 27 and the edge portion of the eaves ceiling material 32 on the eaves side. Is provided with a decorative cover 33.

In contrast to the above basic configuration, in this embodiment, the following configuration can be provided.

(1) The balcony drainage structure is
As shown in FIG. 3, a secondary gutter 41 is provided along the eaves portion 7 of the balcony 2.
Inside the secondary gutter 41, the box gutter 42 is installed in a state of floating from the secondary gutter 41.
A downspout 44 is attached to a drop opening 43 provided in the secondary gutter 41.
As shown in FIG. 4, a drainage member 47 inserted and arranged with a gap 46 with respect to the downspout 44 is attached to the drop opening 45 provided in the box gutter 42.

Here, the secondary gutter 41 is provided as a part of the eaves gutter 8.

The box gutter 42 is provided as a part of the eaves gutter 8. The box gutter 42 is installed inside the secondary gutter 41 so as to form a route different from that of the secondary gutter 41. Therefore, the box gutter 42 is formed to be one size smaller than the secondary gutter 41.

The floating state means that the box gutter 42 is housed and arranged inside the secondary gutter 41 in a state where the box gutter 42 is hardly in contact with the secondary gutter 41. As a result, a gap 48 of a required size is formed between the box gutter 42 and the secondary gutter 41 (between the bottom and the side portions).

The drop opening 43 of the secondary gutter 41 is a drainage hole provided at the downstream end of the secondary gutter 41.

The vertical gutter 44 is a vertical gutter (drainage member) for allowing rainwater to flow downstairs.

The drop opening 45 of the box gutter 42 is a drainage hole provided at the downstream end of the box gutter 42. The drop opening 45 of the box gutter 42 is installed above the drop opening 43 of the secondary gutter 41 in a state of being aligned with the drop opening 43 of the secondary gutter 41. As a result, the drop opening 45 of the box gutter 42 is located directly above the drop opening 43 of the secondary gutter 41, and is separated with a space corresponding to the gap 48.

The drainage member 47 is a member for drainage that is attached to the drop opening 45 of the box gutter 42. The drainage member 47 drains water toward the downspout 44. It is preferable that the drainage member 47 is installed in a state where the center positions of the drainage members 47 are substantially aligned with each other (almost concentrically) with respect to the drop opening 45 of the box gutter 42. The structure of the drainage member 47 and the like will be described later.

The gap 46 is a space provided between the drainage member 47 and the drop port 43 and the downspout 44 of the secondary gutter 41. By installing the drainage member 47 and the drop opening 43 of the secondary gutter 41 substantially concentrically, the gap 46 becomes substantially uniform over the entire circumference. As a result, the drainage member 47 and the drop port 43 and the downspout 44 of the secondary gutter 41 are in a non-contact state.

(2) As shown in FIG.
The floor portion 5 of the balcony 2 may have a floor base material 51, a waterproof sheet 52, and a finished steel plate 53.
As shown in FIG. 6, the secondary gutter 41 may be installed on the downstream side of the waterproof sheet 52 so as to be connected to the waterproof sheet 52.
Further, the box gutter 42 may be installed on the downstream side of the finished steel plate 53 so as to be connected to the finished steel plate 53.

Here, the floor portion 5 may be composed of a floor plate 18 having a multi-layer structure having a floor base material 51, a waterproof sheet 52, and a finished steel plate 53 in order from the lower side. A floor finishing material 54 (FIGS. 2 and 8) can be further installed on the finishing steel plate 53.

For the floor base material 51, for example, a wooden field board is used. For the waterproof sheet 52, for example, a waterproof resin sheet material called a roofing sheet or the like is used. As the finished steel plate 53, a thin steel plate having water resistance called a groove plate is used.

As shown in FIG. 7, the finished steel plate 53 (groove plate) has a flap portion 53a for attaching a joint cover 55 (FIG. 5) on both sides, and is an adjacent building unit to the edge portion on the eaves side. It has an upward rising portion 53b that is inserted and arranged on the back side of the drainage member 57 so as to overlap with the drainage member 57 (FIG. 5) provided on the lower side of the outer wall panel 56 (FIG. 5) of the water underwater. It is a planar member having a tail hanging portion 53c that bends diagonally downward at the side edge portion. If necessary, a plurality of ribs 53d extending upward from the eaves side to the eaves side may be provided on the upper surface of the surface constituting the main body portion of the finished steel plate 53 at appropriate intervals.

When the secondary gutter 41 is installed on the downstream side of the waterproof sheet 52 so as to be connected to the waterproof sheet 52, a path of water W1 (FIG. 6) flowing from the waterproof sheet 52 to the secondary gutter 41 is formed. That is.

The box gutter 42 is installed on the downstream side of the finished steel plate 53 so as to be connected to the finished steel plate 53 by forming a path of water W2 (FIG. 6) flowing from the finished steel plate 53 into the box gutter 42. be.

(About the secondary gutter 41)
As shown in FIG. 8, the secondary gutter 41 has a metal or resin gutter body having a square groove shape having a bottom surface 41a and four side surfaces 41b and 41d surrounding the bottom surface 41a. .. A flange portion 41f that projects outward toward the eaves side and the eaves side is integrally formed on the upper edge portion of both side surfaces 41b (along the extending direction) of the gutter main body. The flange portion 41f is provided on the secondary gutter 41 as a mounting portion for the floor plate 18. The flange portion 41f on the eaves side of the secondary gutter 41 is formed to have a length that substantially reaches the handrail wall portion 6. The flange portion 41f on the eaves side of the secondary gutter 41 is formed to have substantially the same length as the flange portion 41f on the eaves side. The secondary gutter 41 has the following features.

(3) As shown in FIG. 9, the side surface 41d located at the end of the secondary gutter 41 in the extending direction may be lower than the side surface 41b along the extending direction of the secondary gutter 41.

Here, both of the side surfaces 41d located at the end in the extending direction may be lowered, but at least the side surface 41d on the downstream side in the extending direction of the secondary gutter 41 provided with the drainage gradient should be lowered. It's fine. The side surface 41d on the downstream side of the secondary gutter 41 is set as a water level setting unit of the secondary gutter 41.

Then, the above-mentioned secondary gutter 41 is inserted from above into the opening portion 61 formed in the eaves portion 7 of the floor plate 18 (floor base material 51), and is installed between the two floor joists 17 on the eaves side. At the same time, the flange portion 41f provided on the upper edge portion is installed on the floor base material 51, and is attached to the floor base material 51 from the upper side to the lower side by a mounting member such as a screw nail 62.

At this time, as shown in FIG. 10, the socket 63 is adhered and fixed to the upper end portion of the downspout 44 with the adhesive 64, and the drainage receiving member 65 is adhered to the upper end portion of the socket 63 with the adhesive 64. It is fixed and integrated. The socket 63 is a connecting member for attaching the drainage receiving member 65 to the downspout 44. The lower end side of the socket 63 has a size and a cross-sectional shape that can be fitted into the downspout 44, the upper end side has a size and a cross-sectional shape that allows the socket 63 to be fitted inside, and the middle portion has a downspout 44. It has a shape that spreads upward according to the difference in size and shape from the socket 63. It should be noted that the downspout 44 in a broad sense also includes the socket 63 and the drainage receiving member 65.

As the drainage receiving member 65, the same drainage member 47 as described above can be used. The drainage receiving member 65 is composed of two upper and lower members, a lower receiving portion 65a and an upper lid portion 65b. The receiving portion 65a has a female screw, and the lid portion 65b has a male screw. By screwing the male screw into the female screw, the receiving portion 65a and the lid portion 65b are integrated. A receiving portion 65a is adhesively fixed to the upper end portion of the socket 63. The receiving portion 65a has a tubular shape with a step and a narrowing downward. The lid portion 65b has an opening 65c in the center, and the opening 65c is provided with a strainer 65d for catching large dust such as dead leaves. The strainer 65d is a dome-shaped coarse mesh that projects upward.

Then, as shown in FIG. 11, the upper end portion of the receiving portion 65a is brought into contact with the lower surface side of the peripheral edge portion of the drop opening 43 formed on the bottom surface 41a of the secondary gutter 41, and is placed on the receiving portion 65a through the dropping opening 43. By attaching the lid portion 65b so as to be screwed in, the peripheral portion of the drop opening 43 is vertically sandwiched and fixed between the receiving portion 65a and the lid portion 65b.

At this time, as shown in FIG. 12, the receiving portion 65a and the lid portion 65b and the peripheral portion of the drop opening 43 are sealed by the on-site construction type paste-like sealing material 66. Further, as shown in FIG. 13, the strainer 65d of the lid portion 65b is cut off so as not to interfere with the box gutter 42.

Further, as shown in FIG. 6, the waterproof sheet 52 installed on the floor base material 51 is covered with the flange portion 41f of the secondary gutter 41 so as to cover the flange portion 41f from above, and further, the waterproof sheet. The underwater end portion 52a facing the opening portion 61 of the 52 is inserted into the inside of the secondary gutter 41 (the gutter main body) (the gap 48 with the box gutter 42). As a result, the waterproof sheet 52 and the secondary gutter 41 become one connected route.

(About the box gutter 42)
As shown in FIG. 14, the box gutter 42 has a metal or resin gutter body having a square groove shape having a bottom surface 42a and four side surfaces 42b and 42d surrounding the bottom surface 42a. In the box gutter 42, the four side surfaces 42b and 42d of the box gutter 42 are all set to have the same height. On the upper edge of both side surfaces 42b (along the extending direction) of the gutter main body, a horizontal flange portion 42f extending outward toward the eaves side and the eaves side is integrally formed. The horizontal flange portion 42f is provided on the box gutter 42 as a mounting portion for the floor plate 18. At least the lateral flange portion 42f on the eaves side of the box gutter 42 is formed to have a length that substantially reaches the handrail wall portion 6. The horizontal flange portion 42f on the eaves side of the box gutter 42 is formed to have substantially the same length as the horizontal flange portion 42f on the eaves side. The bottom surface 42a of the box gutter 42 is narrower than the bottom surface 41a of the secondary gutter 41. Further, the side surface 42b of the box gutter 42 is higher than the side surface 41b of the secondary gutter 41 by the gap 48 between the bottom surfaces 41a and 42a. The box gutter 42 has the following features.

(4) As shown in FIG. 15, the box gutter 42 may have a vertical flange portion 42h extending upward from the upper edge portion on the eaves side at the upper edge portion on the eaves side.

Here, the upper edge portion on the eaves side and the upper edge portion on the eaves side can include the horizontal flange portion 42f. The vertical flange portion 42h is provided on the box gutter 42 as a waterproof wall of the balcony 2. The vertical flange portion 42h is formed integrally with the horizontal flange portion 42f at the end of the horizontal flange portion 42f on the eaves side so as to rise upward along the plywood 28 under the wall.

Along with this, the lower edge portion of the inner wall material 26 is formed to have a length that does not reach the floor beam 12 on the eaves side. A vertically oriented under-wall plywood 28 is installed in a portion between the lower part of the inner wall material 26 and the floor beam 12 on the eaves side. A metal inner wall sewer 29 is attached between the lower part of the inner wall material 26 and the upper part of the lower wall plywood 28. The inner wall sewer 29 has a substantially stepped shape when viewed from the side, the upper end side portion is inserted and arranged on the back surface side of the inner wall material 26, and the lower end side portion is taken out to the front surface side of the under wall plywood 28. Is done. The vertical flange portion 42h is formed at a height overlapping the lower end side portion of the inner wall sewer drain 29, and is inserted and arranged on the back surface side of the lower end side portion of the inner wall sewer drain 29.

Then, the above-mentioned box gutter 42 is inserted into the inside of the secondary gutter 41 from above. In the box gutter 42, the horizontal flange portion 42f of the upper edge portion is installed on the floor base material 51, the flange portion 41f of the secondary gutter 41, and the waterproof sheet 52, and the mounting members such as screw nails 62 are attached to these from above. In addition to being mounted downward, the vertical flange portion 42h on the eaves side of the upper edge portion is laterally mounted on the wall lower plywood 28 from the inside to the outside by a mounting member such as a screw nail 62. As a result, as described above, the upper end portion of the vertical flange portion 42h is inserted and installed on the back side of the inner wall sewer drain 29 so as to overlap the inner wall sewer drain 29.

Similar to the drainage receiving member 65 described above, the drainage member 47 is composed of two upper and lower members, a lower receiving portion 47a and an upper lid portion 47b. The receiving portion 47a has a female screw, and the lid portion 47b has a male screw. By screwing the male screw into the female screw, the receiving portion 47a and the lid portion 47b are integrated.

Then, as shown in FIG. 16, the upper end portion of the receiving portion 47a of the drainage member 47 is in contact with the lower surface side of the peripheral edge portion of the drop opening 45 formed on the bottom surface 42a of the box gutter 42, and the drop opening is brought into contact with the receiving portion 47a. By attaching the lid portion 47b from above through the 45 so as to be screwed in, the peripheral portion of the drop opening 45 is vertically sandwiched and fixed between the receiving portion 47a and the lid portion 47b. The strainer 47d formed so as to cover the opening 47c is left as it is. Then, as shown in FIG. 17, the space between the receiving portion 47a and the lid portion 47b and the peripheral portion of the drop opening 45 is sealed by a paste-like sealing material 66 of a field construction type.

Further, as shown in FIG. 6, the finished steel plate 53 installed on the waterproof sheet 52 is covered with the horizontal flange portion 42f on the eaves side of the box gutter 42 so as to cover the horizontal flange portion 42f from above. Further, the end of the finished steel plate 53 on the eaves side is installed so as to project toward the box gutter 42 (the main body of the gutter), and the downwardly inclined tail hanging portion 53c provided on the eaves side is attached to the box gutter 42 (of the gutter body). Install (or insert) toward the inside of the gutter body). As a result, the finished steel plate 53 and the box gutter 42 become one connected path. Then, the end of the finished steel plate 53 on the eaves side and the side surface 42b on the eaves side of the box gutter 42 are fixed with rivets 68 via an L-shaped fixing bracket 67.

<Action> The action of this example will be described below.

The balcony 2 needs to be provided with a drainage structure for water W1 and W2 such as rainwater. In such a drainage structure of the balcony 2, as shown in the comparative example of FIG. 18, a single eaves gutter 8 is generally provided along the eaves portion 7 of the balcony 2.

In the case of a drainage structure in which a single eaves gutter 8 is provided along the eaves portion 7 of the balcony 2, for example, when water W1 and W2 from various routes gather in the eaves gutter 8 at once. There is a risk that the drainage capacity of the eaves gutter 8 will be exceeded. In the single eaves gutter 8 in the figure, the downstream end is drawn with a solid line, and the upstream end is drawn with a broken line.

Therefore, in this embodiment, the drainage structure of the balcony 2 is as described above. As a result, the following effects can be obtained.

<Effect> According to this embodiment, the following effects can be obtained.

(Effect 1) The box gutter 42 is installed (multiplexed) inside the secondary gutter 41 while floating from the secondary gutter 41. As a result, the two types of eaves gutters 8 of the secondary gutter 41 and the box gutter 42 can be compactly installed on the eaves portion 7 of the balcony 2 without requiring a large mounting space.

Then, water W1 flows into the secondary gutter 41 from the upper edge portion (flange portion 41f on the eaves side and the eaves side). The water W1 collected in the secondary gutter 41 is drained from the drop opening 43 of the secondary gutter 41 to the vertical gutter 44. Further, water W2 flows into the box gutter 42 from the upper edge portion (horizontal flange portion 42f on the eaves side and the eaves side). The water W2 collected in the box gutter 42 is directly drained from the drainage member 47 provided at the drop opening 45 of the box gutter 42 to the vertical gutter 44 without going through the secondary gutter 41.

As a result, the eaves gutter 8 can be divided into two separate and independent routes, a secondary gutter 41 and a box gutter 42. Then, water W1 and W2 from different routes can be collected separately in the secondary gutter 41 and the box gutter 42, and drained separately from the secondary gutter 41 and the box gutter 42 to the vertical gutter 44. Therefore, the state in which water W1 and W2 from a plurality of routes are collected at once for a single eaves gutter 8 is eliminated, and waters W1 and W2 collected in the secondary gutter 41 and the box gutter 42 are separately collected. Since the water can be drained to the downspout 44, it is possible to effectively suppress / prevent problems such as frequent occurrence of situations where the drainage capacity of the eaves gutter 8 is exceeded.

By arranging the drainage member 47 and the drop port 43 of the secondary gutter 41 substantially concentrically, at the entrance portion of the downspout 44, the water W1 from the secondary gutter 41 is placed on the outer peripheral portion of the downspout 44. Since the flow of water W1 and W2 is easily separated so that the water W2 from the box gutter 42 flows into the center of the downspout 44, an air core is easily secured inside the downspout 44. Therefore, even when the water W1 from the secondary gutter 41 and the water W2 from the box gutter 42 flow into the downspout 44 at the same time, the effect of smoothly flowing the water W1 and W2 into the downspout 44 can be expected.

(Effect 2) The secondary gutter 41 may be installed on the downstream side of the waterproof sheet 52 so as to be connected to the waterproof sheet 52. As a result, the dew condensation water (water W1) generated between the waterproof sheet 52 and the finished steel plate 53 is guided on the waterproof sheet 52 (between the finished steel plate 53 and the eaves side) (from the eaves side to the eaves side). It is drained to the secondary gutter 41, and is drained to the vertical gutter 44 via the secondary gutter 41.

Further, the box gutter 42 may be installed on the downstream side of the finished steel plate 53 so as to be connected to the finished steel plate 53. As a result, the rainwater (water W2) that has fallen on the finished steel plate 53 is guided on the finished steel plate 53 (from the eaves side to the eaves side) and drained to the box gutter 42, and is drained from the box gutter 42 to the vertical gutter 44. It will be drained directly to.

Therefore, the above-mentioned dew condensation water (water W1) and rainwater (water W2) can be individually collected and drained through different routes and separate eaves gutters 8 (secondary gutter 41 and box gutter 42).

At this time, in the unlikely event that the vertical gutter 44 is clogged, the dew water (water W1) of the secondary gutter 41 is stored in the secondary gutter 41 and then directly from the edge of the secondary gutter 41. It will overflow to the outside of 41. The overflowed dew condensation water (water W1) passes through the outside of the secondary gutter 41 and flows to the back surface side of the eaves ceiling material 32.

Further, when the drop opening 45 (strainer) of the box gutter 42 is clogged with dust such as dead leaves, the rainwater (water W2) of the box gutter 42 is stored in the box gutter 42 and then the finished steel plate 53. It will be pooled on top. The rainwater (water W2) pooled on the finished steel plate 53 is drained from the downspout 44 again by removing dust such as dead leaves from the drop opening 45 (strainer).

(Effect 3) The side surface 41d located at the end of the secondary gutter 41 in the extending direction may be lower than the side surface 41b along the extending direction of the secondary gutter 41. As a result, the water W1 accumulated in the secondary gutter 41 can be overflowed from the position of the side surface 41d (particularly on the downstream side) located at the end of the secondary gutter 41 in the extending direction. As a result, the position where the water W1 overflows from the secondary gutter 41 (the side surface 41d on the downstream side) and the path through which the overflowed water W1 passes can be set and specified in advance. Further, according to the above, the optimum water level when the water W1 overflows due to the height of the side surface 41d lowered (than the side surface 41b) can be set and adjusted in advance.

(Effect 4) The box gutter 42 may have a vertical flange portion 42h extending upward from the upper edge portion on the eaves side at the upper edge portion on the eaves side. As a result, rainwater (water W2) may be stored in the box gutter 42 or rainwater (water W2) may be pooled on the finished steel plate 53 due to clogging of the drop opening 45 (strainer) of the box gutter 42. Even in such a state, the vertical flange portion 42h can maintain the waterproofness of the floor portion 5 of the balcony 2. Further, by providing the vertical flange portion 42h on the box gutter 42, the waterproof structure of the floor portion 5 can be simplified and the number of parts required for waterproofing can be reduced.

2 Balcony 7 Eaves tip 8 Eaves gutter 41 Secondary gutter 41b Side 41d Side 42 Box gutter 42h Vertical flange 43 Drop opening 44 Vertical gutter 45 Drop opening 46 Gap 47 Drainage member 51 Floor base material 52 Waterproof sheet 53 Finishing steel plate

Claims (4)

A secondary gutter is set up along the eaves of the balcony,
Inside the secondary gutter, a box gutter is installed while floating from the secondary gutter.
A vertical gutter is attached to the drop opening provided in the secondary gutter, and at the same time,
A balcony drainage structure characterized in that a drainage member inserted and arranged with a gap with respect to the downspout is attached to the drop opening provided in the box gutter. The balcony drainage structure according to claim 1.
The floor of the balcony has a floor base material, a tarpaulin, and a finished steel plate.
The secondary gutter is installed on the downstream side of the waterproof sheet so as to be connected to the waterproof sheet.
The box gutter is a balcony drainage structure characterized in that it is installed on the downstream side of the finished steel plate so as to be connected to the finished steel plate. The balcony drainage structure according to claim 1 or 2.
A balcony drainage structure characterized in that the side surface located at the end of the secondary gutter in the extending direction is lower than the side surface of the secondary gutter along the extending direction. The balcony drainage structure according to any one of claims 1 to 3.
The box gutter has a balcony drainage structure characterized by having a vertical flange portion extending upward from the upper edge portion on the eaves side at the upper edge portion on the eaves side.

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