JP6905931B2 - Drainage structure of the building - Google Patents

Description

The present invention relates to a drainage structure of a building.

In the building of Patent Document 1, hollow portions are provided in the upper frame, the vertical frame, and the lower frame of the inset sash, and water is discharged to the outdoor side through the hollow portions.

Japanese Unexamined Patent Publication No. 2014-114660

In the building of Patent Document 1, the upper frame of the sash arranged (inset) indoors with respect to the outer wall material extends to a position covering the lower surface of the upper outer wall material. For this reason, although the drainage route is secured, the lower surface of the outer wall material is hidden, and the design of the building is deteriorated. That is, in a building in which the sash is arranged indoors with respect to the outer wall material, there is room for improvement in securing a drainage route from the upper side to the sash and suppressing deterioration of the design of the building.

An object of the present invention is to secure a drainage route from the upper side to the sash and suppress deterioration of the design of the building in a building in which the sash is arranged indoors with respect to the outer wall material.

The drainage structure of the building according to the first aspect is provided on the outdoor side with respect to the constituent members constituting a part of the building, and a plurality of outer walls arranged in the width direction orthogonal to the height direction and the inside / outside direction of the building, respectively. A first joint material extending in the height direction and extending from the lower end in the height direction to the indoor side in the inner / outer direction between the material and the plurality of outer wall materials, and the inner / outer direction with respect to the first joint material. On the indoor side of the siding and above the height direction, a second joint material that forms a first flow path through which water flows together with the first joint material, and a lower side of the plurality of outer wall materials in the height direction. Further, a siding provided on the constituent member on the indoor side of the outer surface of the outer wall material on the outdoor side, and provided with an upper frame forming a second flow path in which water flowing from the first flow path is guided in the width direction. A third joint material provided between the outer wall material and the upper frame so that at least a part of the lower surface of the plurality of outer wall materials is exposed, and a third joint material that covers the second flow path from the outdoor side. Have.

In the drainage structure of the building according to the first aspect, since the first flow path is composed of the first joint material and the second joint material, the outflow of water from the first flow path to the outdoor side is suppressed. .. In the first flow path, water flows downward in the height direction and then flows inward toward the indoor side in the inward and outward directions. Then, the water that has flowed to the indoor end of the first flow path flows into the second flow path of the upper frame of the sash. In the second flow path, the water flowing from the first flow path is guided in the width direction. In this way, even if the sash is arranged indoors with respect to the outer wall material, it is possible to secure a drainage route from the upper side to the sash.

Further, since the third joint material covers the second flow path from the outdoor side so that at least a part of the lower surface of the plurality of outer wall materials is exposed, the drainage route can be made difficult to see, and the outer wall material can be made difficult to see. The lower surface can be exposed to suppress deterioration of the design of the building. In this way, in a building in which the sash is arranged indoors with respect to the outer wall material, it is possible to secure a drainage route from the upper side to the sash and suppress deterioration of the design of the building.

A guide member for guiding the water flowing through the first flow path to the upper frame is provided between the indoor side end portion of the second joint material and the constituent member of the drainage structure of the building according to the second aspect. Has been done.

In the drainage structure of the building according to the second aspect, the water flowing through the first flow path and reaching the indoor side end of the second joint material is guided to the upper frame of the sash by the guide member. In other words, when water may flow vigorously from the first flow path toward the constituent member, it is possible to prevent the water from entering the indoor side of the building from the constituent member.

The guide member of the drainage structure of the building according to the third aspect is made of a porous material.

In the drainage structure of the building according to the third aspect, the pores of the porous material serve as water channels and the pore walls regulate the movement of water. As a result, as compared with the configuration in which the member without a hole is provided at the downstream end of the first flow path, the movement of water is restricted and a space portion for flowing water is secured in the space portion having a limited size. be able to.

A part of the guide member of the drainage structure of the building according to the fourth aspect is sandwiched between the constituent member and the outer wall material.

In the drainage structure of the building according to the fourth aspect, a part of the guide member is sandwiched between the constituent member and the outer wall material, so that the gap between the constituent member and the outer wall material is closed. As a result, it is possible to prevent water from entering the indoor side through the gap between the constituent member and the outer wall material.

The drainage structure of the building according to the fifth aspect is provided with a plate-shaped seal backer material that is in contact with the third joint material with the inner and outer directions as the thickness direction and forms the second flow path together with the upper frame. There is.

In the drainage structure of the building according to the fifth aspect, the second flow path is formed by the plate-shaped seal backer material and the upper frame. Therefore, the exposed area of the lower surface of the outer wall material can be increased as compared with the configuration in which the second flow path is formed by using a bulk-shaped member thicker than the plate-shaped member.

In the drainage structure of the building according to the sixth aspect, the outer wall material is provided on at least one side of the sash in the width direction, and the height direction is provided between the sash and the outer wall material in the width direction. A fourth joint material is provided which forms a third flow path through which water flows while extending to the sash and covers the space between the sash and the outer wall material from the outdoor side, and the end portion of the second flow path in the width direction. It is connected to the third flow path.

In the drainage structure of the building according to the sixth aspect, the water flowing in the width direction of the second flow path flows from the width direction end of the second flow path to the third flow path. Then, the water flowing in the third flow path flows downward in the height direction through the third flow path. Here, since the third flow path is covered from the outdoor side by the fourth joint material and is difficult to see from the outdoor side, it is possible to secure the drainage route while suppressing the deterioration of the design of the building. ..

The drainage structure of the building according to the seventh aspect is provided with a closing member that closes a gap between the widthwise side surface of the sash and the constituent member.

In the drainage structure of the building according to the seventh aspect, since the closing member closes the gap between the side surface in the width direction of the sash and the constituent member, it is possible to prevent water from entering the indoor side through the gap between the sash and the constituent member. Can be done.

As described above, in the drainage structure of the building according to the present invention, in the building in which the sash is arranged indoors with respect to the outer wall material, the drainage route from the upper side to the sash is secured and the design of the building is deteriorated. Can be suppressed.

It is a schematic block diagram of the sash of the building which concerns on this embodiment, and the sash peripheral part. It is explanatory drawing which shows the joint around the sash of the building which concerns on this embodiment. It is explanatory drawing which shows the joint between adjacent outer wall materials which concerns on this Embodiment. It is explanatory drawing which shows the joint between the sash and the outer wall material which concerns on this embodiment. It is a schematic cross-sectional view (5-5 line cross-sectional view of FIG. 2) when the part arranged in the height direction with the joint in the building which concerns on this embodiment is seen from the width direction. It is explanatory drawing which looked at the joint which concerns on this embodiment from an oblique direction. It is explanatory drawing which shows the state which attached the seal backer material which concerns on this embodiment to the upper frame of a sash. It is a schematic cross-sectional view (8-8 line cross-sectional view of FIG. 2) when the joint in the building which concerns on this embodiment is seen from the width direction. It is explanatory drawing which looked at the joint which concerns on this embodiment from an oblique direction. It is explanatory drawing which shows the state which water flows in the drainage structure which concerns on this embodiment.

An example of the drainage structure of the building according to the present embodiment will be described.

〔overall structure〕
FIG. 1 shows a schematic configuration of a part of the building 10 to which the drainage structure 30 as an example of the drainage structure of the building is applied. As an example, the building 10 includes columns 12 (see FIG. 4), floor beams (not shown), constituent members 14 (see FIG. 4), and a drainage structure 30. In the following description, the width direction (girder direction or end direction) of the building 10 will be referred to as the X direction, the height direction (vertical direction) will be referred to as the Y direction, and the inner / outer direction will be referred to as the Z direction. The X, Y and Z directions are orthogonal to each other.

<Components>
As an example, the constituent member 14 shown in FIG. 4 includes a sash frame 16 and an outer wall frame 22 arranged on the outdoor side of the building 10, and constitutes a part of the building 10. Further, the component member 14 is supported by a pillar 12 or a floor beam (not shown).

(Frame for sash)
As an example, the sash frame 16 shown in FIG. 5 includes a lower frame 17 that is elongated in the X direction, an upper frame 18 that is elongated in the X direction above the lower frame 17 in the Y direction, and an upper frame 18 that is elongated in the X direction. It has two elongated vertical frames 19 (see FIG. 4). The sash frame 16 supports the sash 42 from the lower side and the indoor side by attaching the sash 42, which will be described later, with screws or the like (not shown).

The lower frame 17, the upper frame 18, and the two vertical frames 19 are connected in a substantially rectangular frame shape when viewed from the Z direction. As an example, the lower frame 17 has a stepped cross-sectional shape in which the upper stage is arranged on the indoor side of the lower stage when viewed from the X direction. As an example, the upper frame 18 is formed in a substantially crank shape having a front wall portion 18A, an upper wall portion 18B, a rear wall portion 18C, and a lower wall portion 18D when viewed from the X direction.

The front wall portion 18A is arranged along the XY plane with the Z direction as the thickness direction. The upper wall portion 18B extends in the Z direction from the upper end of the front wall portion 18A toward the indoor side. Further, the upper wall portion 18B is formed in a rectangular shape with the X direction as the longitudinal direction when viewed from the Y direction. The rear wall portion 18C extends downward in the Y direction from the indoor side end portion of the upper wall portion 18B. The lower wall portion 18D extends in the Z direction from the lower end of the rear wall portion 18C toward the indoor side.

As an example, the vertical frame 19 shown in FIG. 4 has a side wall portion 19A in which a part of the sash 42 described later is attached in the X direction using screws 21A, and another part of the sash 42 in the Z direction using screws 21B. It has a front wall portion 19B attached to the.

(Frame for outer wall)
The outer wall frame 22 shown in FIG. 5 is a member elongated in the X direction. Further, as an example, the outer wall frame 22 is formed in a substantially L shape in which the plate material is bent at a right angle when viewed from the X direction. Specifically, the outer wall frame 22 has an attachment portion 22A attached to the upper frame 18 using bolts or the like, and an outer wall material 32 described later is attached using bolts or the like and supports the outer wall material 32 from the indoor side. It has a support portion 22B. As an example, the gap between the upper frame 18 and the outer wall frame 22 is stopped from the outdoor side by a water blocking material 24 made of a CR (chloroprene rubber) sheet.

[Main part composition]
Next, the drainage structure 30 will be described.

The drainage structure 30 shown in FIG. 5 is an example of a plurality of outer wall materials 32 (see FIG. 2), a first joint material 36, a second joint material 38, a siding 42, a third joint material 44, and a guide member. The sponge material 64 and the fourth joint material 66 (see FIG. 2) are provided. Further, the drainage structure 30 is provided with a seal backer material 72 and a waterproof tape 74 (see FIG. 4) as an example of the closing member.

<Outer wall material>
As an example, the plurality of outer wall materials 32 shown in FIG. 1 are each made of lightweight cellular concrete (ALC) formed in a substantially rectangular plate shape having a thickness direction in the Z direction and a long length in the Y direction. A plurality of grooves 32A are formed on the surface of the outer wall material 32 on the outdoor side. The surface of the outer wall material 32 on the outdoor side constitutes the design surface of the building 10.

Of the plurality of outer wall materials 32, the large one is referred to as a first outer wall material 33, and the small one is referred to as a second outer wall material 34. In FIG. 1, as an example, two first outer wall materials 33 and three upper and lower second outer wall materials 34 are shown. The two first outer wall members 33 are arranged at intervals in the X direction and extend in the Y direction. The three upper and lower second outer wall materials 34 are arranged side by side in the X direction so as to connect the portions above or below the center of the two first outer wall materials 33 in the Y direction in the X direction. In other words, the plurality of outer wall materials 32 are arranged in a quadrangular shape as a whole when viewed from the Z direction. When viewed from the Z direction, a sash 42, which will be described later, is arranged in the hollow portion surrounded by the plurality of outer wall materials 32.

In the drainage structure 30 shown in FIG. 2, the space between the second outer wall material 34 and the second outer wall material 34 in the X direction is referred to as a joint 46. Further, the space between the first outer wall material 32 and the second outer wall material 34 in the X direction is referred to as a joint 47. Further, the space between the first outer wall material 32 in the X direction and the sash 42 described later is referred to as a joint 48. The joint 48 is arranged indoors with respect to the joint 46 and the joint 47. As an example, the drainage structure 30 provided at the joint 47 has the same structure as the drainage structure 30 provided at the joint 46. Therefore, the drainage structure 30 provided at the joint 46 will be described, and the description of the drainage structure 30 provided at the joint 47 will be omitted.

The first outer wall material 33 shown in FIG. 4 is provided on the outdoor side in the Z direction with respect to the outer wall frame 22. Further, the first outer wall material 33 includes an outer surface 33A extending in the X direction on the outdoor side in the Z direction, an inner surface 33B extending in the X direction on the indoor side, and an end portion of the outer surface 33A in the X direction when viewed from the Y direction. It has a side surface 33C that connects the inner surface 33B with the end in the X direction and extends in the Z direction.

The second outer wall material 34 shown in FIG. 3 is provided on the outdoor side in the Z direction with respect to the outer wall frame 22. Further, the second outer wall material 34 includes an outer surface 34A extending in the X direction on the outdoor side in the Z direction, an inner surface 34B extending in the X direction on the indoor side, and an end portion of the outer surface 34A in the X direction when viewed from the Y direction. It has a side surface 34C that connects the inner surface 34B with the end in the X direction and extends in the Z direction. The side surface 34C is formed in a rectangular shape with the Z direction as the lateral direction and the Y direction as the longitudinal direction when viewed from the X direction. Further, the second outer wall material 34 has a lower surface 34D (see FIG. 2) that connects the lower end of the outer surface 34A and the lower end of the inner surface 34B in the Z direction.

<1st joint material>
The first joint material 36 shown in FIG. 3 is made of an amorphous sealing material. Further, the first joint material 36 is arranged at the joint 46 as a primary sealing material constituting the primary waterproof line, and the joint 46 is stopped (closed) with water. As shown in FIG. 5, specifically, the first joint material 36 has a vertical portion 36A extending linearly in the Y direction and an indoor side in the Z direction from the lower end portion of the vertical portion 36A to the vicinity of the outer wall frame 22. It has an extending lateral portion 36B. That is, the first joint material 36 is formed in an L shape when viewed from the X direction. As the first joint material 36, for example, urethane, modified silicon, or the like is used.

The vertical portion 36A is provided at the end of the side surface 34C on the outdoor side in the Z direction along the Y direction. The lateral portion 36B is provided at the lower end portion of the side surface 34C in the Y direction along the Z direction. A space portion 26 is formed between the end portion of the lateral portion 36B on the indoor side in the Z direction and the outer wall frame 22. The length of the space portion 26 in the Z direction is shorter than the length of the horizontal portion 36B in the Z direction. The lower part of the joint 46 in the Y direction is covered from the outdoor side by the first joint material 36.

<Second joint material>
As an example, the second joint material 38 is composed of a standard sealing material 39 and a standard sealing material 41. Further, the second joint material 38 is provided at the joint 46 as a secondary sealing material (gasket). Further, the second joint material 38 is fixed to the second outer wall material 34 by using a double-sided tape or an adhesive (not shown).

The standard sealing material 39 is arranged indoors in the Z direction with respect to the vertical portion 36A, and extends linearly in the Y direction. Further, the standard sealing material 39 extends near the lower end portion of the vertical portion 36A and extends to the outdoor side end portion of the horizontal portion 36B in the Z direction, and is arranged at a slight distance from the vertical portion 36A and the horizontal portion 36B. Further, the standard sealing material 39 is made of an elastic material containing EPDM (ethylene propylene diene rubber) as an example.

When viewed from the Y direction, the standard sealing material 39 shown in FIG. 3 is projected on both sides in the X direction at a plate-shaped base 39A having the X direction as the thickness direction and an indoor end portion of the base 39A in the Z direction. It has an overhanging portion 39B and an overhanging portion 39C extending on both sides in the X direction at the Z-direction outdoor side end portion of the base portion 39A. The overhanging portion 39B and the overhanging portion 39C extend in an oblique direction so that both outer ends in the X direction face the outdoor side, respectively, and a pair of second outer wall materials 34 adjacent to each other in the X direction extend in the X direction. It is compressed to. As a result, in the joint 46, when viewed from the Y direction, as an example, a space portion 43 composed of three closed cross sections is formed. In the space portion 43, air and water can flow in the Y direction.

As an example, the standard sealing material 41 shown in FIG. 5 has the same configuration as the standard sealing material 39, and is different in length and arrangement in the longitudinal direction from the standard sealing material 39. The standard sealing material 41 is arranged on the upper side in the Y direction with respect to the horizontal portion 36B, and extends linearly in the Z direction from the lower end portion of the standard sealing material 39 toward the indoor side. In other words, the standard sealing material 39 and the standard sealing material 41 are arranged in an L shape when viewed from the X direction. The indoor side end portion of the standard sealing material 41 is arranged with a preset interval in the Z direction from the support portion 22B. The indoor side end face of the standard sealing material 41 and the indoor side end face of the horizontal portion 36B are lined up in a substantially aligned state in the Y direction. As described above, the second joint material 38 is arranged on the indoor side in the Z direction and on the upper side in the Y direction with respect to the first joint material 36.

A slight gap is formed between the first joint material 36 and the second joint material 38. Further, the standard sealing material 39 and the standard sealing material 41 have a space portion 43 (see FIG. 3). Here, the gap between the first joint material 36 and the second joint material 38 and the space portion 43 are collectively referred to as a first flow path 49. That is, the second joint material 38 forms the first flow path 49 through which the water W flows together with the first joint material 36. As a result, for example, when a part of the first joint material 36 is cut and water W enters the first flow path 49, the water W flows in the Y direction and Z from the portion in contact with the lateral portion 36B. It is designed to flow indoors in the direction.

<Sash>
The sash 42 shown in FIG. 2 is adjacent to the outer wall material 32 in the X and Y directions, and is provided on the sash frame 16 (see FIG. 4) on the indoor side of the outer surface 33A of the outer wall material 32. Specifically, the sash 42 is provided in the building 10 at a portion below the upper second outer wall material 34 in the Y direction and adjacent to the first outer wall material 33 in the X direction. Further, as an example, the sash 42 has a rectangular frame portion 52 having the X direction as the longitudinal direction and the Y direction as the lateral direction when viewed from the Z direction, and a window glass arranged inside the frame portion 52. It is configured to have 54 and.

The frame portions 52 are a pair of vertical frames 56 that are arranged at intervals in the X direction and extend in the Y direction, an upper frame 57 that connects the upper ends of the pair of vertical frames 56 in the X direction, and a lower end of the pair of vertical frames 56. It is provided with a lower frame 58 that connects the portions in the X direction and supports the window glass 54.

The upper frame 57 shown in FIG. 5 is attached to the upper frame 18 using screws (not shown). Further, the upper frame 57 is formed in a substantially rectangular shape with the Z direction as the longitudinal direction and the Y direction as the lateral direction when viewed from the X direction. The Z-direction outdoor side end of the upper frame 57 protrudes toward the outdoor side from the vertical frame 56. The Z-direction outdoor side end of the upper frame 57 is arranged below the Z-direction central portion of the outer wall material 32 as an example. The upper surface of the upper frame 57 in the Y direction is referred to as the upper surface 57A.

The upper surface 57A extends from the front wall portion 18A to the outdoor side in the Z direction and extends in the X direction. Further, the upper surface 57A is arranged to face the outer wall material 32 (lower surface 34D) and the first joint material 36 in the Y direction. Further, the upper surface 57A is slightly inclined so that both end portions are located on the lower side in the Y direction with respect to the central portion in the X direction. As a result, when the water W flows to the central portion of the upper surface 57A in the X direction, the water W flows toward both ends in the X direction. In other words, the upper frame 57 forms a second flow path 51 in which the water W flowing from the first flow path 49 is guided in the X direction together with the front wall portion 18A.

The lower frame 58 is attached to the lower frame 17 using screws (not shown). Further, the lower frame 58 protrudes from the vertical frame 56 toward the outdoor side in the Z direction. A lower frame drain 59 is attached to the outdoor end of the lower frame 58 by an attachment means such as a snap fit (not shown).

At the outer end of the vertical frame 56 shown in FIG. 4 in the X direction, a mounting portion 56A attached to the side wall portion 19A using screws 21A and a mounting portion 56B attached to the front wall portion 19B using screws 21B are formed. Has been done. When viewed from the Z direction, the mounting portion 56A is formed in a plate shape extending in the Z direction with the X direction as the thickness direction.

The mounting portion 56B extends from the end portion of the mounting portion 56A on the outdoor side in the Z direction to the outside in the X direction (outer wall material 32 side). Further, the mounting portion 56B is arranged so as to overlap the portion of the outer wall material 32 on the indoor side of the center in the Z direction when viewed from the X direction. In a state where the sash 42 is attached to the sash frame 16 and the outer wall material 32 (first outer wall material 33) is attached to the outer wall frame 22, there is a Y direction between the attachment portion 56B and the outer wall material 32. A long joint 48 is formed. The joint 48 is arranged (inset) below and indoors with respect to the joint 47 (see FIG. 2).

<Third joint material>
As an example, the third joint material 44 shown in FIG. 5 is composed of the same amorphous sealing material as the first joint material 36. Further, the third joint material 44 is a horizontal joint between the second outer wall material 34 and the upper frame 57 so that at least a part of the lower surface 34D of the plurality of outer wall materials 32 (second outer wall material 34) is exposed. It is provided in 61 and covers the second flow path 51 from the outdoor side in the Z direction. The state in which at least a part of the lower surface 34D is exposed means a state in which at least a part of the lower surface 34D can be visually recognized from the outdoor side.

Specifically, the third joint material 44 extends linearly in the X direction at the horizontal joint 61 and closes the outdoor side of the horizontal joint 61. Further, the third joint material 44 has a substantially quadrangular cross-sectional shape when viewed from the X direction, and is provided on the central portion of the upper surface 57A in the Z direction and on the outdoor side with respect to the front wall portion 18A. It faces the front wall portion 18A in the Z direction. Further, the third joint material 44 functions as a side wall portion on the outdoor side of the second flow path 51 together with the seal backer material 72 described later, and the water W flowing through the second flow path 51 flows out to the outdoor side in the Z direction. It is restrained from doing. As the third joint material 44, for example, urethane, modified silicon, or the like is used.

The indoor side end face of the third joint material 44 and the indoor side end face of the horizontal portion 36B are lined up in a substantially aligned state in the Y direction. Further, the third joint material 44 is arranged below the first joint material 36 in the Y direction. As a result, the water W that has flowed through the first flow path 49 described above flows downward from the indoor side end of the horizontal portion 36B, flows into the second flow path 51, and flows in the X direction. There is.

<Sponge material>
The sponge material 64 shown in FIG. 6 is provided at the joint 46 between the indoor side end portion of the second joint material 38 and the outer wall frame 22 (constituent member 14). Further, the sponge material 64 is made of a breathable EPDM sponge as an example of the porous material. In the sponge material 64, ventilation is possible by a plurality of holes (not shown), but with respect to the movement of the water W in the X direction, the Y direction, and the Z direction, the plurality of hole walls (not shown) come into contact with the water W. So, at least part of it is being regulated. The sponge material 64 is configured to guide the water to the upper frame 57 by coming into contact with the water W flowing through the first flow path 49.

Specifically, the sponge material 64 is formed in a rectangular parallelepiped shape that is long in the Y direction. The height of the sponge material 64 in the Y direction is higher than the height of the lateral portion 36B and the standard sealing material 41 in the Y direction, and lower than the height of the outer wall frame 22. The sponge material 64 is fixed to the second outer wall material 34 by using a double-sided tape (not shown) or the like. As an example, one sponge material 64 is provided at one joint 46, and by being compressed in the X direction by the second outer wall material 34 at the joint 46, the joint 46 is on the indoor side in the Z direction and the lower part in the Y direction. Is blocked.

As shown in FIG. 5, the sponge material 64 is arranged at the joint 46 between the end surface of the horizontal portion 36B and the indoor side end surface of the standard sealing material 41 and the outer wall frame 22. The sponge material 64 is arranged with a slight gap in the Z direction with respect to the end surface of the horizontal portion 36B and the indoor side end surface of the standard sealing material 41. As a result, the water W that flows through the first flow path 49 and flows out from the indoor end surface of the standard sealing material 41 comes into contact with the sponge material 64 and is guided downward in the Y direction.

As shown in FIG. 3, a part of the sponge material 64 (the indoor side end in the Z direction and both ends in the X direction) is sandwiched in the Z direction between the outer wall frame 22 and the second outer wall material 34, for example. ing. In FIG. 3, only the portion where the sponge material 64 is sandwiched is enlarged and shown.

<4th joint material>
As shown in FIG. 8, the joint 48 is provided with a fourth joint material 66 that extends in the Y direction and forms a third flow path 69 through which water flows. In other words, the fourth joint material 66 covers the joint 48 from the outdoor side in the Z direction. Further, the fourth joint material 66 is composed of an amorphous sealing material 67 and a standard sealing material 68 as an example.

The amorphous sealing material 67 has the same material and shape as the first joint material 36. Further, the amorphous sealing material 67 extends linearly from the indoor side end of the lateral portion 36B of the joint 47 toward the lower side in the Y direction in the joint 48. The portion of the amorphous sealing material 67 that is aligned with the lower frame 58 in the X direction is formed in a stepped shape so that the lower side is arranged on the outdoor side rather than the upper side. The amorphous sealing material 67 is connected to the first joint material 36 at the joint 47 below the sash 42.

The standard sealing material 68 has the same material and shape as the second joint material 38, and has three space portions 43 (see FIG. 3). Further, the standard sealing material 68 is provided at the joint 48 as a secondary sealing material (gasket). Further, the standard sealing material 68 is fixed to the first outer wall material 33 by using a double-sided tape or an adhesive (not shown). In addition, the standard sealing material 68 is arranged on the indoor side in the Z direction with respect to the amorphous sealing material 67, and extends linearly downward in the Y direction from a position facing the indoor side end of the horizontal portion 36B in the Z direction. There is.

Further, the standard sealing material 68 is inclined so that the lower side is arranged on the outdoor side rather than the upper side at the position where the lower frame 58 is aligned with the lower frame 58 in the X direction. The standard sealing material 68 is connected to the second joint material 38 at the lower joint 47. As a result, in the joint 48, the water W flowing downward from the upper joint 47 flows to the lower joint 47 between the amorphous seal material 67 and the standard seal material 68 or through the standard seal material 68. It has become. In other words, the third flow path 69 includes a space portion between the amorphous sealing material 67 and the fixed shape sealing material 68, and a space portion 43 (see FIG. 3) of the fixed shape sealing material 68.

As shown in FIG. 9, the end portion of the second flow path 51 in the X direction and the upper end portion of the third flow path 69 in the Y direction are connected so that water W can flow. That is, the water W that has flowed in the X direction through the second flow path 51 flows into the third flow path 69 and flows downward in the third flow path 69 in the Y direction. It should be noted that not only the water W flowing through the second flow path 51 but also the water W flowing through the first flow path 49 of the upper joint 47 can flow into the third flow path 69.

<Seal backer material>
As an example, the seal backer material 72 shown in FIG. 7 is made of TPO (thermopolyolefin) resin and is formed in a plate shape. Further, the seal backer material 72 is arranged indoors with respect to the third joint material 44 in the horizontal joint 61 with the Z direction as the thickness direction. Further, the seal backer material 72 forms a second flow path 51 together with the upper frame 57 and the front wall portion 18A in a state of being in contact with the third joint material 44 in the Z direction. In FIG. 7, in order to make the second flow path 51 easier to see, the distance between the seal backer material 72 and the front wall portion 18A is widened, but in reality, the seal backer material 72 and the front wall portion 18A are shown. It is preferable to make contact at multiple points.

Further, as an example, the seal backer material 72 includes a plate-shaped base portion 72A extending in the X direction with the Z direction as the thickness direction, and a plurality of recesses formed on the indoor side surface of the base portion 72A and recessed or projected in the Z direction. And a flow path forming portion 72B composed of a plurality of convex portions. On the indoor side surface of the flow path forming portion 72B, one side surface of the double-sided tape (not shown) in the Z direction is attached at multiple points, and the other side surface of the double-sided tape is attached to the front wall portion 18A. Has been done.

An adhesive (not shown) is applied to the outdoor side surface of the base 72A. Then, after the seal backer material 72 is provided in the horizontal joint 61, the third joint material 44 is filled in the horizontal joint 61 so that the seal backer material 72 and the third joint material 44 are adhered to each other. It has become. Since the flow path forming portion 72B has a plurality of concave portions and a plurality of convex portions, even if the tips of the plurality of convex portions are attached to the front wall portion 18A, the plurality of concave portions in the X direction. A long second flow path 51 is secured.

<Waterproof tape>
As an example, the waterproof tape 74 shown in FIG. 4 is made of a butyl tape elongated in the Y direction. Further, the waterproof tape 74 is attached to the front wall portion 19B and the mounting portion 56B at the joint 48 from the outside in the X direction (standard sealing material 68 side). As a result, the waterproof tape 74 closes the gap between the side surface of the sash 42 in the X direction and the constituent member 14 (vertical frame 19).

<Construction of drainage structure>
As shown in FIG. 4, the sash 42 is attached to the component 14 (sash frame 16) using screws 21A, screws 21B, and the like. A standard sealing material 68 is provided on both side surfaces of the sash 42 in the X direction after the waterproof tape 74 is attached, and an irregular sealing material 67 is further provided. On both outer sides of the sash 42 in the X direction, the first outer wall material 32 is attached to the outer wall frame 22 using bolts or the like (not shown). On the upper and lower sides of the sash 42 in the Y direction, as an example, one second outer wall material 34 (see FIG. 1) is attached to the outer wall frame 22 using bolts or the like (not shown).

On both side surfaces in the X direction of one second outer wall material 34 attached to the outer wall frame 22 shown in FIG. 3 (only one side surface is shown in the drawing), the first joint material 36, the second joint material 38, and the sponge material are used. 64 is provided. Then, the remaining second outer wall material 34 is attached to the outer wall frame 22. The second joint material 38 and the sponge material 64 are compressed in the X direction.

In the horizontal joint 61 shown in FIG. 7, the seal backer material 72 is attached to the front wall portion 18A with a double-sided tape (not shown), and then the third joint material 44 is provided (filled) in the horizontal joint 61. The seal backer material 72 and the third joint material 44 are adhered to each other. In this way, the drainage structure 30 is formed.

[Action]
Next, the operation of this embodiment will be described.

In the drainage structure 30 shown in FIG. 5, water W may infiltrate the indoor side of the joint 46. For example, when a part of the first joint material 36 is damaged, water W may infiltrate from the damaged portion into the first flow path 49 on the indoor side of the joint 46. Here, in the drainage structure 30, the case where the water W has entered the first flow path 49 will be described.

The water W that has entered the first flow path 49 flows downward in the Y direction along the first joint material 36 and the second joint material 38, and further flows toward the indoor side in the Z direction to the sponge material 64. To reach. The sponge material 64 regulates the flowing water W from entering the indoor side of the sponge material 64 and guides the water W downward. As a result, the water W flows into the second flow path 51. The second flow path 51 is inclined from the central portion in the X direction toward both ends. Therefore, the water W that has flowed into the second flow path 51 flows through the second flow path 51 toward one end side or the other end side in the X direction.

As shown in FIG. 9, the water W flowing in the X direction through the second flow path 51 flows into the third flow path 69 from the upper end of the third flow path 69, and moves the third flow path 69 downward. It flows. On the other hand, the water W that has entered the first flow path 49 of the joint 47 flows down the first flow path 49 in the Y direction, then flows indoors in the Z direction, and flows into the third flow path 69. do.

FIG. 10 schematically shows a state in which water W flows in the drainage structure 30 of the building 10. As described above, the water W that has entered the upper joint 46 flows around the sash 42 in the order of the first flow path 49, the second flow path 51, and the third flow path 69, and the lower joint 47. Drainage is performed from a discharge port (not shown) formed at the lower end. Further, the water W that has entered the upper joint 47 flows outside the side portion of the sash 42 in the order of the first flow path 49 and the third flow path 69, and is drained from a discharge port (not shown).

As described above, in the drainage structure 30 shown in FIG. 5, the first flow path 49 is composed of the first joint material 36 and the second joint material 38, so that the first flow path 49 is on the outdoor side. The outflow of water W to the joint is suppressed. In the first flow path 49, the water W flows downward in the Y direction and then flows toward the indoor side in the Z direction. Then, the water W that has flowed to the indoor end of the first flow path 49 flows into the second flow path 51 of the upper frame 57. In the second flow path 51, the water W flowing from the first flow path 49 is guided in the X direction. As described above, in the building 10, even if the sash 42 is arranged (inset) indoors with respect to the outer wall material 32, the drainage route from the upper side with respect to the sash 42 can be secured.

Further, in the drainage structure 30, the third joint material 44 covers the second flow path 51 from the outdoor side so that at least a part of the lower surface 34D of the plurality of outer wall materials 32 (second outer wall material 34) is exposed. Therefore, the drainage route of the water W can be made difficult to see from the outdoor side of the building 10, and the lower surface 34D of the outer wall material 32 can be exposed to suppress the deterioration of the design of the building 10. As described above, in the drainage structure 30, in the building 10 in which the sash 42 is arranged indoors with respect to the outer wall material 32, the drainage route from the upper side with respect to the sash 42 is secured and the deterioration of the design of the building 10 is suppressed. can do.

Further, in the drainage structure 30, the water W that flows through the first flow path 49 and reaches the indoor side end portion of the second joint material 38 in the Z direction is guided to the upper frame 57 of the sash 42 by the sponge material 64. In other words, when the water W may flow vigorously from the first flow path 49 toward the component member 14, the sponge material 64 prevents the water W from entering the indoor side of the building 10 from the component member 14. It can be suppressed.

Further, in the drainage structure 30, the holes of the sponge material 64 serve as a flow path for the water W, and the hole walls of the sponge material 64 regulate the movement of the water W. As a result, as compared with the configuration in which the member without a hole is provided at the downstream end of the first flow path 49, the space portion for flowing the water W in the space portion having a limited size while restricting the movement of the water W. (Flow path) can be secured.

In addition, in the drainage structure 30 shown in FIG. 3, a part of the sponge material 64 is sandwiched between the constituent member 14 and the outer wall material 32 (second outer wall material 34), so that the gap between the constituent member 14 and the outer wall material 32 is formed. Is blocked. As a result, it is possible to prevent water W from entering the indoor side through the gap between the constituent member 14 and the outer wall material 32.

Further, in the drainage structure 30 shown in FIG. 7, a second flow path 51 is formed by the plate-shaped seal backer material 72 and the upper frame 57. Therefore, the exposed area of the lower surface 34D of the second outer wall material 34 (see FIG. 5) can be increased as compared with the configuration in which the second flow path 51 is formed by using a bulk-shaped member thicker than the plate-shaped member.

Further, in the drainage structure 30 shown in FIG. 8, the water W flowing in the X direction through the second flow path 51 (see FIG. 7) is from the widthwise end of the second flow path 51 to the upper end of the third flow path 69 (see FIG. 7). It flows to the end surface of the standard sealing material 68). Then, the water W flowing in the third flow path 69 flows downward in the Y direction through the third flow path 69. Here, the third flow path 69 is covered from the outdoor side by the fourth joint material 66, which makes it difficult to see from the outdoor side. Therefore, the drainage route is secured while suppressing the deterioration of the design of the building 10. be able to.

In addition, in the drainage structure 30 shown in FIG. 4, since the waterproof tape 74 closes the gap between the side surface of the sash 35 in the X direction and the constituent member 14, water W from the gap between the sash 42 and the constituent member 14 to the indoor side. (See FIG. 8) can be suppressed from invading.

The present invention is not limited to the above embodiment.

In the drainage structure 30, water W may be naturally dropped from the first flow path 49 to the second flow path 51, except for the sponge material 64. The guide member is not limited to a porous material such as the sponge material 64, and may be a bulk-shaped member having no holes. In this case, the guide members may be arranged at intervals in the Z direction with respect to the first joint material 36 and the second joint material 38 to secure a flow path. Further, the sponge material 64 does not have to be sandwiched between the constituent member 14 and the outer wall material 32.

Further, in the drainage structure 30, the seal backer material 72 may not be provided. Further, in the drainage structure 30, it is not necessary to provide the third flow path 69. For example, another flow path member may be connected to the end of the second flow path 51 in the X direction, and this flow path member may be arranged at a location different from the joint 48 to drain water. In addition, the drainage structure 30 does not have to be provided with the waterproof tape 74. Instead of providing the waterproof tape 74, the space between the constituent member 14 and the sash 42 may be closed with a part of the standard sealing material 68.

The number of the second outer wall materials 34 arranged between the first outer wall materials 33 is not limited to three, and may be two or four or more. The number of sponge materials 64 is not limited to one, and a plurality of sponge materials 64 may be arranged in the Y direction. In the joint 47, the sponge material 64 may be provided on the indoor side in the Z direction with respect to the first joint material 36 and the second joint material 38.

The outer wall material 32 is not limited to ALC, and may be a precast concrete plate, an extruded plate, or the like.

10 Building 14 Components 30 Drainage structure (an example of the drainage structure of a building)
32 Outer wall material 33A Outer surface 34D Lower surface 36 First joint material 38 Second joint material 42 Sash 44 Third joint material 49 First flow path 51 Second flow path 57 Upper frame 64 Sponge material (example of guide member and porous material)
66 4th joint material 69 3rd flow path 72 Seal backer material 74 Waterproof tape (example of closing member)

Claims (7)

A plurality of outer wall materials provided on the outdoor side with respect to the constituent members constituting a part of the building and arranged in the width direction orthogonal to the height direction and the inner / outer direction of the building, respectively.
A first joint material extending in the height direction and extending from the lower end in the height direction to the indoor side in the inner / outer direction among the plurality of outer wall materials.
A second joint material which is arranged on the indoor side in the inner and outer directions and on the upper side in the height direction with respect to the first joint material and forms a first flow path through which water flows together with the first joint material.
The constituent members are provided on the lower side in the height direction with respect to the plurality of outer wall materials and on the indoor side of the outer surface of the outer wall material on the outdoor side, and water flowing from the first flow path is guided in the width direction. A sash with an upper frame that forms a second flow path,
A third joint material provided between the outer wall material and the upper frame so that at least a part of the lower surface of the plurality of outer wall materials is exposed, and a third joint material that covers the second flow path from the outdoor side.
Drainage structure of the building with. The building according to claim 1, wherein a guide member for guiding water flowing through the first flow path to the upper frame is provided between the indoor side end portion of the second joint material and the constituent member. Drainage structure. The drainage structure of the building according to claim 2, wherein the guide member is made of a porous material. The drainage structure of the building according to claim 2 or 3, wherein a part of the guide member is sandwiched between the constituent member and the outer wall material. Any one of claims 1 to 4, wherein a plate-shaped seal backer material is provided which is in contact with the third joint material with the inner and outer directions as the thickness direction and forms the second flow path together with the upper frame. Drainage structure of the building described in the section. The outer wall material is provided on at least one side of the sash in the width direction.
A third flow path extending in the height direction and flowing water is formed between the sash and the outer wall material in the width direction, and the sash and the outer wall material are covered from the outdoor side. 4 joint material is provided,
The drainage structure of a building according to any one of claims 1 to 5, wherein the widthwise end of the second flow path and the third flow path are connected. The drainage structure of a building according to any one of claims 1 to 6, wherein a closing member for closing a gap between the widthwise side surface of the sash and the constituent member is provided.

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