JP2012087607A - Drip structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve the drip processing of an internal corner part formed of a balcony inner wall panel of a handrail of a balcony and a building outer wall panel at a low cost without narrowing the effective floor area of the balcony.SOLUTION: In the drip structure of a building, an outer wall waterproof sheet 30 is provided along the lower end part of a building outer wall panel 11, an inner wall waterproof sheet 40 is provided along the lower end part of the balcony inner wall panel, and a lower part between an end balcony column 22A and an opening 11a is opened to a balcony inner side as a work space SP. The work space SP is closed, a planar drip receiving panel 60 is provided, and a pull-out waterproof sheet 30a pulled out from the opening 11a of the building outer wall panel 11 and the inner wall waterproof sheet 40 are piled up with each other, firmly attached, also held between the drip receiving panel 60 and the balcony inner wall panel and firmly attached to both. The drip receiving panel 60 is detachably attached to the end balcony column 22A by attaching/detaching means.

Description

  The present invention relates to a drainage structure in a corner formed by a building outer wall panel of a building and a balcony inner wall panel of a handrail of a balcony unit, and particularly relates to a drainage structure of a building suitable for application to a unit building.

2. Description of the Related Art Conventionally, a unit building is known in which a balcony unit is coupled to the outside of a building unit that forms a room of a unit building (see, for example, Patent Document 1).
In such a unit building, a waterproof sheet hung from the lower end of the outer wall panel is bonded to the beam of the balcony unit, and draining (raining off) is performed on the room side.

  Further, in such a unit building, when a draining process is performed between the outer wall panels of the building units adjacent to each other facing the balcony in the horizontal direction, the waterproofing for covering the connection tool used to connect the adjacent building units is performed. A cover and a water draining material for connection that is in close contact with the waterproof cover and provided with a water draining material that is in close contact with the waterproof sheet are also known across the waterproof sheet of the adjacent outer wall panel (for example, Patent Documents). 2). Further, this prior art also discloses a connection drainer provided in a corner portion formed by an outer wall panel.

JP-A-8-319704 Japanese Patent No. 2705871

In a building in which a balcony unit as described above is installed, a corner may be formed by a balcony inner wall panel of a handrail provided on the outer peripheral edge of the balcony unit and a building outer wall panel.
In such a corner, when performing the above draining (raining), in the above-described conventional technique, a box-shaped waterproof cover is provided, and the draining material for connection is attached to a waterproof sheet suspended from the building outer wall panel. It will be installed across the waterproof sheet suspended from the inner wall panel of the handrail.

  However, in such a structure, a box-shaped waterproof cover and a draining material for connection are necessary, and since the number of parts is large and the shape is box-shaped, the cost is increased and the waterproof is provided at the lower part of the corner. Since the cover and the draining material for connection protrude in a box shape, there is a problem that the effective floor area of the balcony is reduced.

  The present invention aims to solve the above-mentioned problems, and narrows the effective floor area of the balcony by draining the corner formed by the balcony inner wall panel and the building outer wall panel of the balcony handrail. The object is to provide a drainage structure of a building that can be achieved at low cost without any problems.

  In order to achieve the above object, the invention according to claim 1 is an entrance corner formed by a building outer wall panel and a balcony inner wall panel provided on a wall of a handrail raised from the floor of the balcony unit. The wall portion includes a plurality of balcony pillars as a skeleton member that supports the balcony inner wall, and an inner wall lower member is provided between the balcony inner wall panel and the floor portion. An outer wall lower member is provided between a lower end portion of the building outer wall panel and the floor portion, and a waterproof sheet in close contact with the lower portion of the building outer wall panel and the outer wall lower member is provided at the lower end portion of the building outer wall panel. An inner wall tarpaulin that is provided along a lower end of the balcony inner wall panel and is in close contact with a lower portion of the balcony inner wall panel and the lower member of the inner wall. The panel is provided with an opening at a position facing the end of the wall, and the outer wall waterproof sheet is continuously provided with a drawer waterproof sheet having a length that can be pulled out from the opening along the wall. The lower part between the opening balcony column and the opening provided at the position closest to the unit building among the plurality of balcony columns is inside the balcony as a work space for pulling out the drawer tarpaulin And the work space is closed, a plate-shaped water drainage panel is provided, and the drawer waterproof sheet and the inner wall waterproof sheet drawn out from the opening are in close contact with each other, The water drainage panel and the balcony inner wall panel are sandwiched between and closely attached to each other, and the water drainage panel is detachably attached to the end balcony pillar by an attaching / detaching means. And wherein the are.

The invention according to claim 2 is characterized in that, in the water drainage structure of the building according to claim 1, the attaching / detaching means is an adhesive tape for adhering the drainage receiving panel to the end balcony column. .
According to a third aspect of the present invention, in the water draining structure for a building according to the first aspect, the attaching / detaching means is a sandwiching portion provided in the drainage receiving panel so that the end balcony pillar can be sandwiched. The part is arranged so that the drainage panel closes the working space when the end balcony pillar is sandwiched.
Further, according to a fourth aspect of the present invention, in the water drainage structure for a building according to the third aspect, the drainage receiving panel is bent in a horizontal direction from a vertical surface portion that covers the work space and an upper end of the vertical surface portion. The end balcony is inserted between the horizontal parts so that the end balcony pillar can be held between the horizontal parts. An insertion portion is provided, and the vertical surface portion is formed with a fold that guides bending in a direction in which the width of the insertion portion increases.

  Further, the invention according to claim 5 is the drainage structure for a building according to any one of claims 1 to 4, wherein the frame member has the end balcony pillar and the horizontal pillar in the horizontal direction. A balcony inner wall receiver that is arranged between the adjacent balcony pillars and extends in the up-down direction and is installed on a trunk-rim upper member and a trunk-rim lower member that connect the top and bottom of both balcony pillars in the vertical direction. A member is provided, and the inner wall panel of the balcony includes an inner wall upper panel divided from the other portion in a portion including the working space and covering between the inner wall receiving member of the balcony and the building. And

  The invention according to claim 6 is the construction drainage structure method for a building according to any one of claims 1 to 5, wherein the building outer wall panel provided in a building unit in a factory. An opening is formed, the drawer waterproof sheet is accommodated in the opening, and in the balcony unit, at least a portion of the wall portion covering the work space in the balcony inner wall panel is removed from the wall portion. On the other hand, the drainage panel is attached to the balcony column, and after the building unit and the balcony unit are combined in the construction site, the drainage panel is removed from the balcony column. A step of opening the work space, and the drawer waterproof sheet from the opening through the work space. The step of pulling out to the inside of the coney unit, the state where the drainage panel is reattached to the balcony pillar, the inner wall waterproof sheet and the drawer waterproof sheet are overlapped and adhered to each other, and the back surfaces of both sheets are A step of closely contacting the drainage panel and the inner wall lower panel, and a step of fixing the detached balcony inner wall panel to the wall portion and closely contacting the inner wall waterproof sheet and the drawer waterproof sheet. It is characterized by doing.

  In the present invention, at the corner, the drawer waterproof sheet that is continuous with the outer wall waterproof sheet that is in close contact with the building outer wall panel and the outer wall lower member is pulled out from the opening of the building outer wall panel to the balcony side, and the balcony inner wall panel and inner wall lower member It is overlaid on the inner wall waterproof sheet that adheres closely to. Therefore, the continuity of the outer wall waterproof sheet and the inner wall waterproof sheet can be maintained by interposing the drawer waterproof sheet even at the corner.

  In this way, the draining of the corners is performed by the outer wall waterproof sheet, the inner wall waterproof sheet, and the drawer waterproof sheet, and since there are no members protruding outward from the corners, the effective floor area of the balcony is not reduced. The drainage performance can be secured at low cost.

In addition, the working space formed in the lower part between the end balcony pillar and the opening of the building outer wall panel is covered with a drainage receiving panel, and the part where the inner wall waterproof sheet and the drawer waterproof sheet overlap is the front and back Is closely attached to the drainage receiving panel and the inner wall panel of the balcony, and the drainage performance at the corners can be kept high.
And since the drainage panel can be attached to and detached from the end balcony pillar, at the time of construction, the drainage panel can be removed as necessary to open the work space, and the drainage panel is fixed and work Compared with the case where the use space is blocked, the workability when the drawer waterproof sheet is pulled out from the opening of the building outer wall panel to the inside of the balcony is excellent.
Moreover, after pulling out from the opening of the drawer tarpaulin, the water drainage panel is attached to the end balcony pillar again to ensure adhesion with each tarpaulin when the balcony inner wall panel is attached to the work space. High drainage performance can be obtained.

FIG. 1 is a cross-sectional view showing a lower part of a handrail 22 in a construction end state of the water draining structure for a building according to the first embodiment of the present invention, and shows a cross section taken along the line S1-S1 in FIG. FIG. 2 is a cross-sectional view showing an upper part of the handrail 22 in the construction end state of the water draining structure of the building according to the first embodiment, and shows a cross section at the position of line S2-S2 in FIG. FIG. 3 is a plan view showing an outline of a unit building UH to which the water draining structure of the building of the first embodiment is applied. FIG. 4 is a perspective view showing a state in the middle of construction of the corner portion A to which the water draining structure of the building of the first embodiment is applied. FIG. 5 is a cross-sectional view showing a state in the middle of construction of the water draining structure of the building of the first embodiment, and shows a cross section at the position of line S5-S5 in FIG. FIG. 6 is a perspective view showing a balcony unit used in the water draining structure of the building of Embodiment 1, and shows a state where the balcony inner wall panel 25 and the balcony outer wall panel 26 are not attached. FIG. 7 is an enlarged perspective view of a part of the water draining structure of the building according to the first embodiment. FIG. 8 is an enlarged perspective view of a part of the water draining structure of the building according to the first embodiment. FIG. 9 is a perspective view for explaining the construction of the water draining structure for a building according to the first embodiment. FIG. 10 is a cross-sectional view illustrating the construction of the water draining structure for a building according to the first embodiment. FIG. 10 (a) illustrates the sealing operation with the building outer wall panel 11 side by pulling out the opening waterproof sheet 20a from the opening 11a. (B) shows a state in which the inner wall upper panel 50 is attached. FIG. 11 is a perspective view for explaining the construction of the water draining structure for a building according to the first embodiment. FIG. 12 is a perspective view showing a balcony unit applied to the water draining structure of the building of the second embodiment, and shows a state where the balcony inner wall panel 25 and the balcony outer wall panel 26 are not attached as in FIG. FIG. 13 is an enlarged perspective view showing a main part of the water draining structure of the building according to the second embodiment.

  Hereinafter, embodiments in which the present invention is applied to a unit building will be described with reference to the accompanying drawings.

(Embodiment 1)
FIG. 3 is a schematic plan view of the unit building UH to which the water draining structure of the building of the first embodiment is applied.
This unit building UH is formed by connecting a balcony unit U2 to the outside of a building unit U1 that forms a living room (not shown).
The building unit U1 is covered on the outdoor side with a building outer wall panel 11 shown in FIG. The building outer wall panel 11 is formed by connecting a plurality of panels in the horizontal direction, and a gasket 13 is interposed between the building outer wall panels 11.

  In the building unit U1, the pillar 12 shown in FIGS. 1 and 2 formed of a metal frame and a beam not shown are assembled in a frame shape. Each building outer wall panel 11 is supported by an outer wall panel frame 12a having a metal frame in a square frame shape on the back side, and the building outer wall panel 11 is connected to the column 12 and the beam by connecting the outer wall panel frame 12a to the pillar 12 and the beam. It is fixed to the building unit U1.

  The balcony unit U2 is formed by installing a floor surface material 21b on the structure formed by the floor frame 21a shown in FIG. 5 and has a rectangular shape in plan view (see FIG. 3). 6 includes a handrail 22 shown in FIG. 6 erected at positions where the outer peripheral edge of the portion 21 has two short sides and one long side of a rectangle in plan view.

  The handrail 22 includes a plurality of balcony columns 22a and 22A that are erected as a skeleton member at a predetermined interval in the horizontal direction, a trunk edge lower member 22b that connects lower portions of these balcony columns 22a and 22A, and a balcony column 22a. 22A and 22A, and 22A, 22A, 22b, and 22c are connected in a frame shape. Note that only one of the plurality of balcony pillars 22a and 22A has a different code, but the details thereof will be described later. When the entire balcony pillars 22a and 22A are collectively referred to, the reference numeral 22A is omitted. .

And the handrail 22 is provided with the lattice part 23 and the wall part 24 in the space pinched | interposed into the balcony pillar 22a.
The lattice portion 23 is provided with a plurality of lattice members (not shown) standing in the space between the balcony columns 22a and 22a.

  The wall 24 is formed by covering the space between the balcony columns 22a with the balcony inner wall panel 25 and the balcony outer wall panel 26 shown in FIG.

In the first embodiment, in the handrail 22, a rectangular short side portion (hereinafter referred to as a short side portion) in plan view is formed by a wall portion 24 as shown in FIG. Further, in the handrail 22, a rectangular long side portion (hereinafter, referred to as a long side portion) in a plan view is provided with a lattice portion 23 at a central portion in the longitudinal direction, and wall portions 24 are provided at both ends thereof. ing.
In addition, as shown in FIG. 2, the wall part 24 is provided with a balcony inner wall panel 25 and a balcony outer wall panel 26 inside and outside with a handrail space part 24a formed therebetween.

  Returning to FIG. 6, in the handrail 22, an inner wall lower panel (inner wall lower member) 27 is provided between the trunk edge lower member 22 b and the floor portion 21. The inner wall lower panel 27 is fixed to the lower body edge member 22b by a connecting means such as a screw, and the upper end of the wall 24 is covered by the lower end of the balcony inner wall panel 25. Yes.

  As shown in FIG. 4, an outer wall lower member 17 is provided between the building outer wall panel 11 and the floor portion 21. The outer wall lower member 17 is, for example, a beam that forms the skeleton of the building unit U1, and the upper end portion thereof is covered with the building outer wall panel 11 in the horizontal direction.

  An outer wall waterproof sheet 30 is provided between the building outer wall panel 11 and the outer wall lower member 17. The outer wall waterproof sheet 30 has a surface facing the outdoor side in close contact with the inside of the building outer wall panel 11 (for example, a portion extending in the horizontal direction of the outer wall panel frame 12a) with a sealant or the like interposed therebetween, The surface facing the indoor side is in close contact with the outer surface of the outer wall lower member 17 with a sealant or the like interposed therebetween.

  Also on the wall portion 24 of the handrail 22, an inner wall waterproof sheet 40 is provided between the balcony inner wall panel 25 and the inner wall lower panel 27. The inner wall waterproof sheet 40 has a surface facing the inside of the balcony in close contact with the inside of the balcony inner wall panel 25 with a sealant or the like interposed therebetween, and a surface facing the outside of the balcony on the outer surface of the inner wall lower panel 27 is sealed. Etc. are in close contact with each other.

  Next, the draining structure of the corner A formed by the building outer wall panel 11 of the building unit U1 and the wall 24 of the handrail 22 will be described.

In this description, first, the structure on the building unit U1 side will be described.
As shown in FIG. 1, the building outer wall panel 11 is provided with an opening 11a.
The opening 11a is formed by cutting out the lower side of the left and right edge portions in the horizontal direction into an L shape when the building outer wall panel 11 is viewed from the front. It is opened in a range that overlaps the short side.

Moreover, a balcony handrail parting material 14 is provided at the periphery of the opening 11a.
As shown in FIG. 7, this balcony handrail parting material 14 is formed into a substantially U-shaped frame shape when viewed from the front by vertical frames 14a, 14b and an upper frame 14c, and is a hat cross-sectional shape as viewed from above. Is formed. As shown in FIG. 1, the vertical frames 14a and 14b are installed in the opening 11a along the left and right side edges of the opening 11a, and the upper frame 14c is inserted in the opening 11a along the upper edge of the opening 11a. It is installed at. The flange portion of the vertical frame 14b is cut off at the lower end of the opening 11a as shown in FIG.

  Returning to FIG. 7, a substantially inverted U-shaped balcony handrail receiving bracket 15 is coupled to the upper frame 14c of the balcony handrail parting material 14 as viewed from above. The balcony balustrade batting material 14 and the balcony balustrade batting bracket 15 are mounted on the building site. Further, the balcony balustrade batting material 14 and the balcony balustrade baling bracket 15 fixed to the balcony balustrade baling bracket 15 on the trunk edge of the handrail 22 The member 22c is coupled.

  The above-described outer wall waterproof sheet 30 is installed in a factory, and the outdoor side surface of the upper end portion thereof is in close contact with the outer wall panel frame 12a at the lower back of the building outer wall panel 11 via a sealing material as shown in FIG. On the other hand, the indoor side surface of the lower end is in close contact with the outer wall lower member 17 via a sealing material.

  Furthermore, the outer wall waterproof sheet 30 has a surplus longer than the position of the edge of the building outer wall panel 11 at the position of the opening 11a of the building outer wall panel 11, and this surplus is the drawer waterproof sheet 30a. The drawer waterproof sheet 30a is coated with a sealing material (not shown) on the back side in advance, and the sealing material is covered with a release paper (not shown). And the drawer | drawing-out waterproof sheet 30a is accommodated in the opening 11a, when shipped from a factory.

Next, the structure of the entrance corner A on the handrail 22 side will be described.
In the first embodiment, a plurality of balcony columns 22a are erected on the short side portion of the handrail 22 as shown in FIG. Of these balcony columns 22a, the balcony column 22A closest to the building unit U1 is hereinafter referred to as an end balcony column.

The end balcony column 22A is arranged at a position where the work space SP is interposed from the surface of the building outer wall panel 11, and the dimension L in the indoor / outdoor direction of the work space SP is specifically, The size is about 40 mm.
Further, between the end balcony column 22A of the handrail 22 forming the corner A shown in FIG. 6 and the adjacent balcony column 22a, the balcony inner wall receiving member 28 shown in FIG. It is erected across the upper trunk edge member 22c.

  The short side portion of the handrail 22 is formed by the wall portion 24. At the time of shipment from the factory, on the side closer to the building unit U1 than the balcony inner wall receiving member 28, the balcony inner wall panel 25 is not installed and the handrail space portion 24a. Is opened to form an open portion OP. Further, a balcony inner wall panel 25 and a balcony outer wall panel 26 are attached to the wall portion 24 at the factory except for the opening portion OP. An inner wall upper panel 50 is attached to the open portion OP at the construction site.

Next, draining (raining) at the corner A will be described.
In the first embodiment, a drainage receiving panel 60 shown in FIG. 8 is detachably attached to the lower part of the end balcony column 22A. That is, in the first embodiment, the trunk edge lower member 22b connects the balcony columns 22a, but is not provided in the work space SP on the building unit U1 side than the end balcony columns 22A. Therefore, in the first embodiment, in the work space SP, the drainage receiving panel 60 is used as a member that supports the inner wall waterproof sheet 40, the drawer waterproof sheet 30a, and the inner wall upper panel 50 on the surface, instead of the trunk edge lower member 22b. Is provided.

  The drainage panel 60 is a thin metal plate, and has a vertical dimension larger than that of the lower trunk edge member 22b, and a horizontal dimension as shown in FIG. It is formed in a rectangular shape having a size of about the distance from the end portion on the side far from the building unit U1 of 22A. Moreover, in this Embodiment 1, the adhesive tape 61 shown in FIG. 8 is used as an attachment / detachment means which makes the water drainage panel 60 attachable / detachable to the end balcony pillar 22A. That is, the drainage panel 60 is bonded to the end balcony column 22A by the adhesive tape 61, and the adhesive tape 61 is removed from the end balcony column 22A by removing the adhesive tape 61 from the end balcony column 22A. It is possible to attach the drainage panel 60 to the end balcony column 22A by adhering the adhesive tape 61 to the end balcony column 22A again or with a new adhesive tape 61. Further, as shown in FIG. 1, the inner wall waterproof sheet 40 (not shown in FIG. 8) extends to a position where it overlaps the drainage panel 60 and is in close contact with the drainage panel 60 via a sealing material.

  And the drawer | drawing-out waterproof sheet | seat 30a following the outer wall waterproof sheet | seat 30 is pulled out from the opening 11a, and overlaps with the inner wall waterproof sheet | seat 40 at the position which overlaps with the water draining panel 60 in a horizontal direction, and is contact | adhered through the sealing material.

  Further, as shown in FIG. 4, the inner wall upper panel 50 to be retrofitted at the construction site is coupled to the trunk edge upper member 22 c by two screws 51 and the balcony inner wall receiving member by the two screws 51. 28 and is in close contact with the inner wall waterproof sheet 40 and the drawer waterproof sheet 30a via a sealing material 71 (see FIG. 9) at a position overlapping the drainage panel 60 in the horizontal direction. In addition, this sealing material 71 is provided double in the up-down direction.

Next, the construction procedure of the water draining structure of the building according to the first embodiment will be described.
(Construction at the factory)
In the factory, the building unit U1 and the balcony unit U2 are assembled.
In this case, first, the building unit U1 will be described with respect to the configuration related to the drainage structure in the corner section A.
In the building unit U1, an opening 11a is provided in the building outer wall panel 11, and the drawer waterproof sheet 30a, which is a surplus continuous to the outer wall waterproof sheet 30, is curved inside the opening 11a as shown by a two-dot chain line in FIG. Or rolled or folded. This prevents the drawer waterproof sheet 30a from being damaged or damaged during transportation. In this case, it is more preferable that the drawer waterproof sheet 30a is fixed to the building unit U1 side by fixing means such as an adhesive tape.

  As shown in FIG. 4, the balcony unit U <b> 2 has a balcony inner wall panel 25 and a balcony outer wall panel 26 attached to the wall portion 24 of the handrail 22 except for an open portion OP continuous to the short-side building unit U <b> 1. In addition, the balcony outer wall panel 26 on the back side of the opening part OP is attached to the wall part 24 as shown in FIG.

  And in this open part OP, adhesive tape 60 is attached to the end balcony pillar 22A with the lower end surface thereof in contact with or close to the upper end surface of the inner wall lower panel 27 as shown in FIG. Adhere with 61.

  In addition, the inner wall waterproof sheet 40 provided between the rear side of the lower end of the balcony inner wall panel 25 and the inner wall lower panel 27 is extended to the tip of the handrail 22 at the opening OP as shown in FIG. The receiving panel 60 is kept in close contact with a sealing material.

(Construction site construction)
Next, construction at a construction site will be described.
At the construction site, after installing the building unit U1, first, the balcony handrail parting material 14 and the balcony handrail receiving bracket 15 are fixed to the opening 11a of the building outer wall panel 11 with screws.
Thereafter, the balcony unit U2 is coupled to the building unit U1. At this time, as for the handrail 22 of the balcony unit U2, the front-end | tip of the short side part is arrange | positioned facing the opening 11a of the building outer wall panel 11, as shown in FIG.

  Then, the balcony handrail fixing metal fitting 16 is inserted into the balcony handrail receiving metal fitting 15 and fixed with screws as shown in FIG. 2, and this balcony handrail fixing metal fitting 16 is fixed to the upper trunk edge member 22c of the handrail 22 with screws. To do.

  In this way, when the installation of the balcony unit U2 is finished, the drainage structure portion of the entrance corner A is constructed.

  In this construction, first, the adhesive tape 61 is peeled off from the end balcony column 22A, the drainage receiving panel 60 is removed from the end balcony column 22A, and the work space SP is opened to the inside of the balcony. In this case, the portion of the inner wall waterproof sheet 40 that is in close contact with the drainage receiving panel 60 is also separated from the working space SP together with the drainage receiving panel 60 to open the working space SP.

  Next, as shown by an alternate long and two short dashes line in FIG. 1, the drawer waterproof sheet 30a of the outer wall waterproof sheet 30 accommodated in the opening 11a of the building outer wall panel 11 is pulled out from the opening 11a as indicated by an arrow Y1. In this case, the work space SP is a narrow space in which the space between the building outer wall panel 11 and the end balcony column 22A is about 40 mm. The drawing operation of the sheet 30a can be easily performed. At this time, in the drawer waterproof sheet 30a, the portion overlapping the inner wall lower panel 27 in the height direction is disposed through a minute gap formed between the inner wall lower panel 27 and the outer wall lower member 17.

  Thus, when the drawing work of the drawer waterproof sheet 30a is completed, as shown in FIG. 10A, the sealing material 72 is filled between the outer wall panel frame 12a and the drawer waterproof sheet 30a for sealing. .

Next, the drainage receiving panel 60 is again fixed to the original position of the end balcony pillar 22 </ b> A with the adhesive tape 61. In this case, the adhesive tape 61 peeled off at one end may be used for adhesion, or when the adhesive strength is insufficient, a new adhesive tape 61 may be used for adhesion.
Then, the release paper (not shown) covering the sealing material (not shown) provided on the back surface of the drawer waterproof sheet 30a is peeled off, and the drawer waterproof sheet 30a is brought into close contact with the inner wall waterproof sheet 40 at a position overlapping the drainage receiving panel 60. .

  Next, as shown in FIG. 9, sealing is performed in a minute gap portion of the corner A formed by the outer wall lower member 17 and the inner wall lower panel 27 at a position below the waterproof sheets 30, 30 a, 40. The material 73 is filled and sealed.

Next, the inner wall upper panel 50 is attached to the opening part OP of the wall part 24.
In this case, first, as shown in FIG. 4, the sealing material 75 is applied to the side of the balcony inner wall receiving member 28 facing the inside of the balcony, and in the range indicated by the alternate long and short dash line S shown in FIG. A sealing material is applied to the sheet 30 a and the inner wall waterproof sheet 40. In this case, in this Embodiment 1, the sealing material 71 applied to the drawer | drawing-out waterproof sheet 30a and the inner-wall waterproof sheet 40 is apply | coated two strips up and down, as shown in FIG.
Then, the upper two portions of the inner wall upper panel 50 are fixed to the trunk upper member 22c with screws 51, and the lower two portions are fixed to the balcony inner wall receiving member 28 with screws 51.

  Next, as shown in FIG. 11, the joint portion 52 between the inner wall upper panel 50 and the balcony inner wall panel 25, the joint portion 53 between the inner wall upper panel 50 and the building outer wall panel 11, the upper portion of the handrail 22 and the building Sealing is performed by filling a sealing material 77 in the joint portion 54 between the outer wall panel 11 and the joint portion between the balcony outer wall panel 26 and the building outer wall panel 11 (not shown).

(Operational effect of Embodiment 1)
In the water draining structure of the building of the first embodiment formed as described above, the outer wall waterproof sheet 30 and the inner wall waterproof sheet 40 are respectively connected to the building outer wall panel 11 and the balcony inner wall panel 25 on the upper outer surface. The lower inner surface is brought into close contact with the outer wall lower member 17 and the inner wall lower panel 27, so that drainage performance can be secured.

Further, at the corner A, the drawer waterproof sheet 30a, which is the extended outer wall waterproof sheet 30 extended, is pulled out from the opening 11a of the building outer wall panel 11 to the inside of the balcony and overlapped with the inner wall waterproof sheet 40, thereby waterproofing the outer wall. Water drainage performance can be secured while maintaining continuity between the sheet 30 and the inner wall waterproof sheet 40. Thus, the drainage performance in the corner A is secured by maintaining the continuity of the outer wall waterproof sheet 30 and the inner wall waterproof sheet 40, and a member protruding outward from the corner A is used. Therefore, the effective floor area of the balcony is not reduced, and it can be implemented at a low cost.
In addition, a drainage panel 60 is attached to the work space SP formed between the end balcony pillar 22A and the opening 11a of the building outer wall panel 11, and the drawer waterproof sheet 30a and the inner wall waterproof sheet 40 overlap. Since the portions are in close contact with the front and rear surfaces sandwiched between the drainage receiving panel 60 and the inner wall upper panel 50, the drainage performance of the corner A can be kept high.
The drainage panel 60 is detachable from the end balcony column 22A. Therefore, when construction is performed at the construction site, the drainage panel 60 is detached from the end balcony column 22A as necessary to open the work space SP. As compared with the case where the drainage receiving panel 60 is fixed and the lower portion of the work space SP is closed, the work of pulling out the drawn waterproof sheet 30a from the opening 11a is facilitated.
In addition, since the adhesive tape 61 is used to make the water drainage panel 60 detachable from the end balcony column 22A, it is easier to attach and detach than using screws or the like. Also excellent in workability. In addition, when the adhesive tape 61 is peeled off from the end balcony column 22A and then adhered again to the end balcony column 22A, if the peeled adhesive tape 61 has insufficient adhesiveness, The water drainage panel 60 can be easily adhered to the end balcony column 22A using the new adhesive tape 61, and this is excellent in workability.

(Embodiment 2)
Next, the water draining structure of the building according to the second embodiment will be described.
Since the second embodiment is a modification of the first embodiment, only differences from the first embodiment will be described, and when the same configuration as the first embodiment is illustrated, the first embodiment will be described. The same reference numerals are assigned and the description is omitted. Also, the description of the same effects as those of the first embodiment is omitted.

  The second embodiment is different from the second embodiment in the attachment / detachment means. The drainage panel 260 shown in FIGS. 12 and 13 is provided with a pair of horizontal portions 263 as attachment / detachment means and a sandwiching portion as shown in FIG. , 263 and a notch portion 261 as an insertion portion.

The drainage panel 260 is formed in an inverted L-shaped vertical cross section by a vertical surface portion 262 that closes the working space and a pair of horizontal portions 263 and 263 that are bent horizontally from the upper end of the vertical surface portion 262. It has a part.
A notch portion 261 is formed between the horizontal portions 263 and 263, and the width of the notch portion 261 is formed to be slightly wider than the width of the end balcony column 22A. The end balcony pillar 22A is formed so as to be sandwiched between a pair of horizontal portions 263 and 263 on both sides of the end portion.

  Furthermore, a pair of creases 264 and 264 are formed in the vertical surface portion 262 along the vertical direction from both ends in the width direction of the notch portion 261. Thereby, even if the vertical surface portion 262 has a certain thickness, the vertical surface portion 262 can be bent as shown by a two-dot chain line in FIG. 13 to increase the width of the notch portion 261.

Next, the operation of the second embodiment will be described.
In the second embodiment, when assembling the balcony unit U2 in the factory, when the draining panel 260 is attached to the end balcony column 22A as shown in FIG. 12, the vertical surface portion 262 of the draining panel 260 is As shown by a two-dot chain line in FIG. 13, the notch 261 is widened by being elastically deformed so as to be bent at the positions of the folds 264 and 264. Further, in this state, the water drainage receiving panel 260 is attached to the end balcony column 22A so that the notch portion 261 is inserted into the end balcony column 22A. When the force input to bend the vertical surface portion 262 is removed, the width of the notch portion 261 is reduced and the pair of horizontal portions 263 are end portions as the vertical surface portion 262 is restored to a flat state. The balcony pillar 22A is sandwiched.
Therefore, the water drainage panel 260 is maintained in a state of being attached to the end balcony column 22A.

  Next, in the construction site, after the installation of the balcony unit U2, when performing the drainage structure portion of the entrance corner A, first, the vertical surface portion 262 of the drainage receiving panel 260 is bent at the position of the crease 264 and the notch portion 261 is formed. The width is widened and the drainage panel 260 is once removed from the end balcony column 22A, and the work space SP is opened to the inside of the balcony.

  And the drawer | drawing-out waterproof sheet 30a of the outer wall waterproof sheet 30 accommodated in the opening 11a of the building outer wall panel 11 is pulled out similarly to Embodiment 1. FIG.

Thereafter, the vertical surface portion 262 of the water drainage receiving panel 260 is again bent and elastically deformed from the fold line 264 to widen the width of the notch portion 261, and the water drainage receiving panel 260 is inserted so as to insert the end balcony pillar 22A into the notch portion 261. It attaches to the original position of the end balcony column 22A, restores the vertical surface portion 262, and fixes the drainage receiving panel 260 to the end balcony column 22A.
The release paper (not shown) covering the sealing material (not shown) provided on the back surface of the drawer waterproof sheet 30a is peeled off, and the drawer waterproof sheet 30a is overlapped with the vertical surface portion 262 of the water drainage panel 260 at the inner wall waterproof sheet. Adhere to 40. At this time, since the water drainage panel 260 is formed in an L-shaped cross-sectional shape, it is difficult to bend even when a pressing force for bringing the drawer waterproof sheet 30a into close contact is applied, and high adhesion is obtained as compared with the planar shape. be able to.

As described above, in the second embodiment, as the attaching / detaching means, the notch portion 261 and the pair of horizontal portions 263, 263 sandwiching the notch portion 261 are formed in the water drainage receiving panel 260, and the end balcony pillar is interposed between the horizontal portions 263, 263. Since 22A is sandwiched, the detachability of the drainage receiving panel 260 to the end balcony column 22A is excellent.
In addition, the vertical surface portion 262 of the water cut-off panel 260 is formed with a pair of creases 264 and 264 that guide bending in the direction in which the width of the cutout portion 261 is widened at positions corresponding to both ends of the cutout portion 261 in the width direction. Even if the thickness of the surface portion 262 is set to a thickness necessary to bring the drawer waterproof sheet 30a and the inner wall waterproof sheet 40 into close contact with each other, the vertical surface portion 262 can be smoothly bent. Excellent.

  Further, since the horizontal portion 263 continuously bent to the vertical surface portion 262 is used as the sandwiching portion, the water drainage panel 260 is formed in an L-shaped cross section at the horizontal portions 263, 263, and the horizontal portions 263, 263 are provided. Compared with the shape that does not, the rigidity of the vertical surface portion 262 is improved, the support rigidity when the drawer waterproof sheet 30a is in close contact with the inner wall waterproof sheet 40 is improved, and the adhesion between the sheets 30a and 40 is improved.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment, A various deformation | transformation and substitution can be added in the range which does not deviate from the summary of this invention.

For example, in the embodiment, a unit building is shown as a building. However, the building is not limited to this, and the present invention is other than a conventional construction method or other unit building that performs all construction at a construction site. It can also be applied to other buildings.
In the embodiment, the outer waterproof sheet 30 is extended as the drawer waterproof sheet, and the drawer waterproof sheet 30a integrated with the outer wall waterproof sheet 30 is shown. However, the drawer waterproof sheet is not limited to this, and the outer waterproof sheet is not limited thereto. A separate body may be provided continuously on the outer wall waterproof sheet, and this may be overlapped and adhered to the inner wall waterproof sheet. In this case, unlike the outer wall waterproof sheet, a drawer waterproof sheet having a dimension including a material and a thickness that are optimal for use in the corner A can be used.

  Further, as the water drainage panel, a panel having a shape or a size different from that shown in the embodiment may be used.

  Furthermore, although the adhesive tape 61 and the notch part 261 were shown in the embodiment as attachment / detachment means for detachably attaching the water drainage receiving panel to the end balcony pillar, the present invention is not limited thereto. For example, a double-sided tape that can maintain adhesiveness even after attachment / detachment is used, a fastening means such as a screw is used, or an engaging means such as a protrusion and a hole, a fitting convex part and a fitting receiving part is used. be able to.

  Further, the shape of the building unit and the balcony unit is not limited to the shape shown in the embodiment, and in short, the present invention is applied as long as it has a corner portion formed by both. can do.

Further, in the second embodiment, the example in which the horizontal portions 263 and 263 as the insertion portion and the notch portion 261 are provided over the entire length of the vertical surface portion 262 is shown, but these are provided in a part of the vertical surface portion 262. May be.
Further, as shown in the second embodiment, the sandwiching portion is formed by horizontal portions 263 and 263 that are continuous to the vertical surface portion 262, and the end balcony using a member separate from the vertical surface portion 262. You may make it pinch a pillar.

DESCRIPTION OF SYMBOLS 11 Building outer wall panel 11a Opening 17 Outer wall lower member 21 Floor part 22 Handrail 22A End balcony pillar 22a Balcony pillar 22b Trunk edge lower member 22c Trunk edge upper member 24 Wall part 25 Balcony inner wall panel 27 Inner wall lower panel (inner wall lower member)
28 Balcony inner wall receiving member 30 Outer wall waterproof sheet 30a Drawer waterproof sheet 40 Inner wall waterproof sheet 50 Inner wall upper panel 60 Drain panel 61 Adhesive tape (detaching means)
260 Water drainage panel 261 Notch (insertion part)
262 Vertical surface portion 263 Horizontal portion (detachable means; clamping portion)
H.264 Crease A Entrance corner H Unit building OP Opening part SP Work space U1 Building unit U2 Balcony unit UH Unit building

Claims (6)

A water draining structure of a building in a corner formed by a building outer wall panel and a balcony inner wall panel provided on a wall of a handrail raised from the floor of the balcony unit,
The wall portion includes a plurality of balcony pillars as a skeleton member that supports the inner wall of the balcony,
An inner wall lower member is provided between the balcony inner wall panel and the floor,
An outer wall lower member is provided between a lower end portion of the building outer wall panel and the floor portion,
A waterproof sheet closely attached to the lower part of the building outer wall panel and the lower member of the outer wall is provided along the lower end of the building outer wall panel,
An inner wall waterproof sheet in close contact with the lower part of the balcony inner wall panel and the lower member of the inner wall is provided along the lower end of the balcony inner wall panel,
The building outer wall panel is provided with an opening at a position facing the end of the wall,
The outer wall waterproof sheet is continuously provided with a drawer waterproof sheet having a length that can be pulled out from the opening along the wall.
Of the plurality of balcony pillars, a lower part between the end balcony pillar arranged at a position closest to the unit building and the opening is opened to the inside of the balcony as a work space for drawing out the drawer waterproof sheet. ,
The work space is closed, and a plate-shaped drainage panel is provided,
The drawer waterproof sheet pulled out from the opening and the inner wall waterproof sheet are in close contact with each other, and are sandwiched between the water drainage panel and the balcony inner wall panel and are in close contact with each other,
The water drainage structure of a building, wherein the drainage receiving panel is detachably attached to the end balcony pillar by an attaching / detaching means.   The building draining structure according to claim 1, wherein the attaching / detaching means is an adhesive tape that bonds the draining panel to the end balcony column.   The attaching / detaching means is a holding part provided in the water cut-out receiving panel so as to be able to hold the end balcony column, and when the end balcony post is held in the holding unit, the water cut-off panel is used for the work. The water draining structure for a building according to claim 1, wherein the structure is disposed so as to close the space. The water drainage panel includes a portion formed in an inverted L-shaped vertical cross section by a vertical surface portion that closes the working space and a pair of horizontal portions bent in the horizontal direction from the upper end of the vertical surface portion. The end balcony column can be sandwiched by both horizontal parts, and includes an insertion part for inserting the end balcony between both horizontal parts,
The water drainage structure for a building according to claim 3, wherein a crease is formed in the vertical surface portion to guide bending in a direction in which the width of the insertion portion is widened. The frame member is disposed between the end balcony column and the balcony column adjacent thereto in the horizontal direction, and is connected to the upper and lower sides of the balcony columns in the vertical direction. A balcony inner wall receiving member is provided which is installed on the lower edge member and extends in the vertical direction.
The said inner wall panel of a balcony is provided with the inner wall upper panel divided | segmented from the other part in the part which covers the space between the said inner wall receiving member and the said building including the said working space. The water draining structure for a building according to any one of claims 4 to 5. It is the construction method of the water draining structure of the building of any one of Claims 1-5,
In a factory, an opening is formed in the building outer wall panel provided in the building unit, the drawer waterproof sheet is accommodated in the opening, and in the balcony unit, at least the work on the balcony inner wall panel of the wall portion While the portion covering the space is in a state removed from the wall, the drainage panel is attached to the balcony pillar,
In a construction site, after combining the building unit and the balcony unit,
Removing the water drainage panel from the balcony pillar and opening the working space;
A step of pulling out the drawer waterproof sheet from the opening to the inside of the balcony unit through the work space;
The water drainage panel is reattached to the balcony pillar, and the inner wall waterproof sheet and the drawer waterproof sheet are overlapped and adhered to each other, and the back surfaces of both sheets are attached to the water drainage panel and the inner wall lower panel. A step of closely adhering to
Fixing the balcony inner wall panel in the detached state to the wall, and closely contacting the inner wall waterproof sheet and the drawer waterproof sheet;
The construction method of the water draining structure of the building characterized by performing.