JP2017180009A - Water drip structure of exterior wall, and installation method for water drip on exterior wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water drip structure for an exterior wall and an installation method for a water drip on an exterior wall that suppress declining of appearance quality.SOLUTION: The water drip structure for an exterior wall includes: an upper floor exterior wall surface material 16 provided on a building outer side of an upper floor-side unit 14 of a unit building 10; a lower floor exterior wall surface material 42 provided on the building outer side of a lower floor-side unit 40 of the unit building 10 and having a cutout part 50 on a top edge side 48; a waterproof sheet 72 having a top edge part 104 fitted on an exterior wall frame 18 for holding the upper floor exterior wall surface material 16, and a bottom edge part 78 disposed on the building outer side of the cutout part 50 of the lower floor exterior wall surface material 42; and a water drip 70 on the exterior wall provided on the building outer side of the waterproof sheet 72, formed in a plate-form, and having an upper wall part 76 extending toward a building lower side from a top edge part 74 and disposed on a rear surface side of the upper floor exterior wall surface material 16, and a lower wall part 80 extending toward a building upper side from the bottom edge part 78 and disposed inside the cutout part 50 of the lower floor exterior wall surface material 42.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an outer wall draining structure and an outer wall draining mounting method.

  Japanese Patent Application Laid-Open No. H10-228688 discloses a wall bottom processing structure for an outer wall panel. In the wall bottom processing structure of the outer wall panel, a waterproof sheet and a decorative body difference are provided between the lower end portion of the upper floor outer wall surface material and the upper end portion of the lower floor outer wall surface material. Specifically, the upper end of the waterproof sheet is attached to the inner surface of the building at the lower end of the upper floor wall material, and the lower end of the waterproof sheet is attached to the design surface at the upper end of the lower floor wall member. ing. And the makeup | deviation trunk | drum difference is attached to the building outer side of the waterproof sheet. The decorative body difference and the waterproof sheet prevent water from entering the building through between the upper floor outer wall material and the lower floor outer wall material.

Japanese Examined Patent Publication No. 6-39809

  However, in the wall under-treatment structure of the outer wall panel disclosed in Patent Document 1, the design difference between the upper and lower outer wall surfaces and the lower floor outer wall material of the waterproof sheet is caused by the difference between the decorative drums. Since it is set as the structure which covers the site | part attached to the surface from the building outer side, the size of a makeup cylinder difference becomes large. That is, the appearance quality may be deteriorated because the difference in the makeup cylinder is conspicuous in the exterior of the building. Therefore, the above prior art has room for improvement in this respect.

  In view of the above problems, an object of the present invention is to obtain an outer wall draining structure and an outer wall draining attachment method capable of suppressing deterioration in appearance quality.

  The outer wall draining structure according to the first aspect, the upper floor outer wall surface material provided on the building outer side of the upper floor unit disposed on the upper floor side of the unit building constructed in a plurality of floors, Located on the lower floor side of the unit building and provided on the outer side of the lower floor unit placed directly below the upper floor unit, a part of the design surface on the upper end side is notched in the thickness direction. A lower floor outer wall material having a cut-out portion and an upper end attached to an outer wall frame holding the upper floor outer wall material, and a lower end cut out of the lower floor outer wall material. The waterproof sheet disposed on the building outer side of the building, and the upper wall portion provided on the building outer side of the waterproof sheet, formed in a plate shape, and extended from the upper end to the building lower side Located on the back side of the upper floor wall material and extending from the lower end to the building upper side Lower wall portion has a, and an outer wall dewatering disposed in the notch portion of the lower floor outer wall surface member was.

  In the outer wall draining structure according to the second aspect, in the invention according to the first aspect, a folded portion that is folded back toward the inside of the building is provided at a lower end portion of the outer wall draining.

  The outer wall draining structure according to the third aspect is the invention according to the first or second aspect, wherein the building outer surface of the lower wall portion of the outer wall draining is substantially flush with the design surface of the lower floor outer wall material. Are arranged.

  The outer wall draining structure according to a fourth aspect is the invention according to any one of the first to third aspects, wherein the waterproof sheet is attached to a building inner surface of the outer wall draining.

  In the outer wall draining structure according to the fifth aspect, in the invention according to the fourth aspect, a gap is provided between the waterproof sheet and the building outer surface at the notch of the lower floor outer wall surface material. .

  The outer wall draining structure according to a sixth aspect is the invention according to any one of the first to fifth aspects, wherein the outer wall draining is formed at both ends in the horizontal direction and is one-step inward of the general part. The first outer wall drainer formed with a stepped portion disposed on the side, the stepped portion is formed at one end in the horizontal direction, and the other end opposite to the one end is substantially the same as the one half surface. A plurality of second outer wall drainers formed on the same surface, and a third outer wall drainer whose both ends in the horizontal direction are formed on substantially the same surface as the general part, the first outer wall drainer The other end portion of another second outer wall drainer is superimposed on the stepped portion of one of the stepped portions or the second outer wall drainer from the outside of the building, and the other stepped portion of the first outer wall drainer and The second outer wall drainer facing this It said end portion of the third outer wall draining is provided over the entire circumference of the unit building be superposed from each building outer side and the difference portion.

  The outer wall draining structure according to a seventh aspect is the invention according to any one of the first to sixth aspects, wherein the outer wall draining is attached to the outer wall frame via a fastener and the fastening in the outer wall draining. A spacer is provided at a portion fastened by the tool.

  The outer wall drainer mounting method according to the eighth aspect includes an upper floor outer wall surface material provided on the building outer side of the upper floor unit disposed on the upper floor side of the unit building constructed in a plurality of floors, The lower floor unit, which is disposed on the lower floor side of the unit building and directly below the upper floor unit, is provided on the exterior side of the building, and a part of the design surface on the upper end side is cut in the thickness direction. The lower floor outer wall material having the notched portion, the upper end is attached to the outer wall frame holding the upper floor outer wall material, and the lower end is the lower floor outer wall material cut. A waterproof sheet disposed on the building exterior side of the notch, and an upper wall portion provided on the building exterior side of the waterproof sheet, formed in a plate shape, and extended from the upper end to the building lower side It is arranged on the back side of the upper floor outer wall material and the upper side of the building from the lower end The extended lower wall portion is disposed in the notch portion of the lower floor outer wall material, and is formed at both ends in the horizontal direction and arranged in a single step inside the building relative to the general portion. The first outer wall drainer in which the part is formed and the stepped part is formed at one end part in the horizontal direction, and the other end part opposite to the one end part is formed on substantially the same plane as the general part. Applied to an outer wall drainer structure comprising: a plurality of second outer wall drainers; and an outer wall drainer composed of a third outer wall drainer whose both ends in the horizontal direction are formed on substantially the same plane as the general part, A first step of disposing a first outer wall drainer between the upper floor outer wall material and the lower floor outer wall member; and the other in the second outer wall drainer at one step portion of the first outer wall drainer. The second outer wall drainer is overlapped with the upper floor by overlapping the end from the outside of the building A second step disposed between a wall surface material and the lower floor outer wall surface material, and the other end portion of the other second outer wall drainer on the stepped portion of the one end portion of the second outer wall drainer outside the building. A third step in which the second outer wall drainer is disposed between the upper floor outer wall surface material and the lower floor outer wall surface material, and the both ends in the horizontal direction of the third outer wall drainer are overlapped from the other side. The upper outer wall surface material and the lower floor are overlapped with the stepped portion of the first outer wall drainer and the stepped portion of the second outer wall drainer facing the first outer wall draining from the outside of the building, respectively. And a fourth step provided between the outer wall surface materials.

  In the outer wall drainer mounting method according to the ninth aspect, the outer wall drainer is made of metal or resin, and the upper wall portion of the outer wall drainer is previously attached to the outer wall frame of the upper floor side unit in the factory. The upper floor unit is transported to a building site and is suspended and installed on the lower floor unit at the building site so that the lower wall portion of the outer wall drainer is connected to the lower floor outer wall surface material. Fit in the notch.

  According to the first aspect, the outer wall drainage is provided on the exterior side of the waterproof sheet, and the interior of the building is interposed between the upper floor outer wall material and the lower floor outer wall material by the outer wall drainer and the waterproof sheet. Suppresses intrusion of water. In addition, the outer wall drainer is located on the back side of the upper floor wall material and the lower wall is disposed in the notch of the lower floor wall material, so that the outer wall drainer The amount exposed to the wall and the amount protruding from the lower floor outer wall material of the outer wall drainer are reduced. Therefore, it is possible to make the outer wall drainer inconspicuous from the outside of the building.

  According to the 2nd aspect, since the folding | turning part is provided in the lower end part of the outer wall draining, the rigidity of an outer wall draining is improved. Therefore, the deformation of the outer wall draining can be suppressed.

  According to the 3rd aspect, since the building outer surface of the lower wall part of an outer wall drainer and the design surface of a lower floor outer wall surface material are arrange | positioned on the substantially same surface, an outer wall drainer is from a lower floor outer wall surface material. It becomes the structure which does not protrude almost. Therefore, it can be a clean building exterior.

  According to the 4th aspect, since the waterproof sheet is attached to the building inner side surface of an outer wall drainer, the operation | work which attaches a waterproof sheet to a building and the operation | work which attaches an outer wall drainer to a building can be performed simultaneously. Therefore, it is possible to reduce the number of assembling work steps.

  According to the fifth aspect, since the gap is provided between the waterproof sheet and the building outer surface at the cutout portion of the lower floor outer wall surface material, the inside or outside of the unit building is passed through this gap. Air can flow. That is, it is possible to suppress the intrusion of water into the building while ensuring the air permeability of the building.

  According to the 6th aspect, the outer wall drainer provided over the perimeter of the unit building is comprised by the 1st outer wall drainer, the 2nd outer wall drainer, and the 3rd outer wall drainer. In addition, the part where the first outer wall drainer, the second outer wall drainer and the third outer wall drainer are overlapped each other is a stepped portion, so the overlapping part protrudes outward from the building. There is nothing. Accordingly, it is possible to suppress the intrusion of water into the building through the space between the upper floor outer wall surface material and the lower floor outer wall surface material around the entire unit building while maintaining a clean building exterior.

  According to the 7th aspect, since the spacer is provided in the site | part fastened by the fastener in an outer wall draining, the rigidity in the said site | part in an outer wall draining is improved by this spacer. Therefore, the deformation of the outer wall draining by the fastener during fastening can be suppressed.

  According to the eighth aspect, when the outer wall drainer is provided on the entire circumference of the unit building, the first outer wall drainer is provided between the upper floor outer wall material and the lower floor outer wall material, and then the plurality of second outer wall drainers are provided. The first outer wall drainer is provided between the upper floor outer wall material and the lower floor outer wall material, and finally the third outer wall drainer is provided between the upper floor outer wall material and the lower floor outer wall material. Since either one of the portions where the two outer wall drainers and the third outer wall drainer are overlapped becomes a stepped portion, the overlapped portion does not protrude to the outside of the building. Accordingly, it is possible to suppress the intrusion of water into the building through the space between the upper floor outer wall surface material and the lower floor outer wall surface material around the entire unit building while maintaining a clean building exterior.

  According to the ninth aspect, since the outer wall drainer is attached to the upper floor unit in advance in the factory, the outer wall drainer can be attached to the upper floor unit with high accuracy, so that the quality can be improved. In addition, since the outer wall drainer is made of metal or resin, the shape in which the lower wall part of the outer wall drainer is arranged in the notch of the lower floor outer wall material is maintained, so the upper floor unit in the building area Can be placed on the lower floor unit so that the lower wall portion of the outer wall drainer can be accommodated in the notch portion of the lower floor surface material. In other words, since work on site can be reduced, the construction period can be shortened.

  As described above, the outer wall draining structure and the outer wall draining attachment method according to the present invention have an excellent effect that deterioration in appearance quality can be suppressed.

It is the schematic which shows arrangement | positioning of the building unit which comprises the unit building which has the outer wall draining structure which concerns on one Embodiment. It is an expanded sectional view showing the state where a part of unit building which has an outer wall draining structure concerning one embodiment was cut. It is a perspective view which shows the 2nd outer wall drainer provided in the protrusion corner part in the outer wall drainer structure which concerns on one Embodiment. It is a perspective view which shows the 2nd outer wall drainer provided in the entrance corner part in the outer wall drainer structure which concerns on one Embodiment. It is a perspective view which shows the overlap part of the outer wall draining in the outer wall draining structure which concerns on one Embodiment. It is the schematic which shows the position of the 1st outer wall drainer, the 2nd outer wall drainer, and the 3rd outer wall drainer in the outer wall drainer structure which concerns on one Embodiment.

  Hereinafter, an embodiment of an outer wall draining structure according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the unit building 10 is constructed in a multi-story (two-story as an example) by a plurality of building units 12 placed on a foundation (not shown) (in this figure, the building The roof is omitted for easy understanding of the arrangement of the units 12). Each of the building units 12 has a rectangular parallelepiped shape, and the building unit 12 is provided so as to overlap in the vertical direction of the building, so that the upper floor (second floor in the present embodiment) and the lower floor (main book) are provided. In the embodiment, the first floor) is configured.

  As shown in FIG. 2, the upper floor side of the unit building 10, that is, the outer side of the upper floor side unit 14 constituting the second floor is configured to include an upper floor outer wall material 16 and an outer wall frame 18. An outer wall material panel 20 is attached. The upper floor outer wall material 16 is made of a material such as concrete or ceramics having excellent weather resistance.

  The upper floor outer wall material 16 is attached to the outer wall frame 18 disposed on the inner side of the building with respect to the upper floor outer wall material 16 by a fastener (not shown). The outer wall frame 18 is arranged at each end of the upper floor outer wall surface material 16 in the vertical direction of the building, and has a horizontal frame 22 extending in the horizontal direction along the end, and the upper floor. The outer wall surface material 16 is composed of a vertical frame (not shown) that connects the horizontal frames 22 at the ends in the vertical direction of the building in the vertical direction of the building. The horizontal frame 22 has an outer vertical wall portion 24, an inner vertical wall portion 26, one end portion of the outer vertical wall portion 24 in the vertical direction of the building, and a corresponding vertical portion of the inner vertical wall portion 26 in the vertical direction of the building. A cross-sectional shape orthogonal to the longitudinal direction is formed in a substantially U shape by the bottom wall portion 28 that connects one end portion in a substantially horizontal direction. Moreover, the horizontal frame 22 provided in the position corresponding to the lower end part 30 of the upper-floor outer wall surface material 16 is arrange | positioned in the direction by which the cross-sectional opening was open | released toward the building lower side.

  A through hole 32 penetrating in the thickness direction is formed in the inner vertical wall portion 26 of the horizontal frame 22. Also, a large beam through hole 33 formed corresponding to the through hole 32 is formed in the large floor beam 34 constituting a part of the upper floor unit 14 with which the inner vertical wall portion 26 abuts. The bolts 36 are inserted into the 32 and the large beam through-holes 33 and fastened by the nuts 38, whereby the horizontal frame 22 and the outer wall frame 18 are fixed to the floor large beam 34.

  The lower floor unit 40 (see also FIG. 1) which is arranged directly below the upper floor unit 14 constituting the second floor of the unit building 10 and which constitutes the lower floor (first floor) of the unit building 10 is located outside the building. An outer wall surface panel 46 including a lower floor outer wall surface material 42 and an outer wall frame 44 is attached to the side. Similar to the upper floor outer wall surface material 16, the lower floor outer wall surface material 42 is made of a material such as concrete or ceramic having excellent weather resistance.

  A cutout portion 50 that is cut out in the thickness direction is formed on a part of the design surface 52 (outside surface of the building) on the upper end portion 48 side of the lower floor outer wall surface material 42. The notch 50 is composed of a building outer surface 54 that is flat and parallel to the design surface 52, and an inclined wall portion 56 that connects the design surface 52 and the building outer surface 54 in a substantially plate thickness direction. ing. Since the building outer surface 54 is disposed inside the building with respect to the design surface 52, the thickness of the portion of the lower floor outer wall material 42 where the notch 50 is formed is the same as that of the lower floor outer wall material 42. It is made thinner than the plate | board thickness of the site | part in which the notch part 50 is not formed.

  The lower-floor outer wall surface material 42 is attached to an outer wall frame 44 disposed inside the building with respect to the lower-floor outer wall surface material 42 by a fastener (not shown). The outer wall frame 44 is arranged at each end of the lower floor outer wall surface material 42 in the vertical direction of the building, and has a horizontal frame 58 extending in the horizontal direction along the end, and a lower floor. The outer wall surface material 42 is configured by a vertical frame (not shown) that connects the horizontal frames 58 at the ends of the building in the vertical direction of the building in the vertical direction of the building. The horizontal frame 58 is similar to the horizontal frame 22 in the outer wall frame 18 of the upper floor unit 14 constituting the second floor of the unit building 10, and the outer vertical wall portion 60, the inner vertical wall portion 62, and the outer vertical wall. The bottom wall portion 64 that connects one end portion of the building 60 in the vertical direction of the building and one end portion of the inner vertical wall portion 62 corresponding thereto in the vertical direction of the building in a substantially horizontal direction is orthogonal to the longitudinal direction. The cross-sectional shape is formed in a substantially U shape. Moreover, the horizontal frame 58 provided in the position corresponding to the upper end part 48 of the lower-floor outer wall surface material 42 is arrange | positioned in the direction where the cross-sectional opening was open | released toward the building upper side.

  A through hole 66 penetrating in the thickness direction is formed in the inner vertical wall portion 62 of the horizontal frame 58. Also, a large beam through hole 67 formed corresponding to the through hole 66 is formed in the ceiling large beam 68 that constitutes a part of the lower floor unit 40 with which the inner vertical wall portion 62 abuts. The bolt 36 is inserted into the 66 and the large beam through-hole 67 and fastened by the nut 38, whereby the horizontal frame 58 and the outer wall frame 44 are fixed to the ceiling large beam 68 and the lower floor unit 40.

  An outer wall drainer 70 and a waterproof sheet 72 are attached to the outer vertical wall portion 24 of the horizontal frame 22 of the upper floor unit 14. The outer wall drainer 70 is made of an aluminum alloy as an example, and is formed in a plate shape having a horizontal direction as a longitudinal direction along the lower end portion 30 of the upper floor outer wall material 16 (see FIG. 5).

  The outer wall drainer 70 has an upper wall portion 76 that extends from the upper end portion 74 toward the lower side of the building, and a lower wall portion that extends toward the upper side of the building from a lower end portion 78 that is disposed on the outer side of the building with respect to the upper end portion 74. A cross-sectional shape orthogonal to the longitudinal direction is formed in a substantially crank shape by the wall 80 and the connecting wall 86 that connects the lower end 82 of the upper wall 76 and the upper end 84 of the lower wall 80 in the vertical direction of the building. Has been. And the upper wall part 76 of the outer wall drainer 70 is arrange | positioned at the back surface side of the upper floor outer wall surface material 16, ie, the building inner side. A notch 49 cut out in the thickness direction is formed on the back surface (inner side surface of the building) at the lower end 30 of the upper floor outer wall material 16, and the outer wall drainage is formed in the notch 49. The upper wall part 76 of 70 is arrange | positioned.

  Further, the lower wall portion 80 of the outer wall drainer 70 is disposed in the cutout portion 50 of the lower floor outer wall surface material 42. Further, the connecting wall portion 86 of the outer wall drainer 70 is disposed in the gap between the lower end portion 30 of the upper floor outer wall surface material 16 and the upper end portion 48 of the lower floor outer wall surface material 42. In addition, the building outer side surface of the lower wall portion 80 of the outer wall drainer 70 is disposed on substantially the same plane as the design surface 52 of the lower floor outer wall surface material 42. In addition, the vertical dimension of the lower wall 80 is substantially the same as the vertical dimension of the portion of the window frame (not shown) provided in the unit building 10 that extends along the horizontal direction. .

  A mounting hole 92 is formed in the upper end 74 of the outer wall drainer 70 so as to penetrate therethrough in the thickness direction. A plurality of the mounting holes 92 are formed at intervals in the longitudinal direction of the outer wall drainer 70 (see FIG. 3). A spacer 94 is attached to the inner surface of the building where the attachment hole 92 of the outer wall drainer 70 is formed. The spacer 94 is formed in a plate shape, and the plate thickness is set to be substantially the same as the plate thickness of the outer wall drainer 70. The spacer 94 is formed with a through hole 96 that penetrates in the thickness direction corresponding to the mounting hole 92 of the outer wall drainer 70.

  A folded portion 98 is formed at the lower end 78 of the outer wall drainer 70. The folded portion 98 is formed by being bent so that a part of the lower end portion 78 is inward of the building and faces the inclined wall portion 56 of the lower floor outer wall surface material 42. A gap 134 is provided between the tip of the folded portion 98 and the building outer surface 54 of the notch 50.

  A waterproof sheet 72 is attached to the inner surface of the outer wall drainer 70. The waterproof sheet 72 is formed of a CR (chloroprene rubber) sheet as an example, and is provided on substantially the entire inner surface of the outer wall drainer 70. Further, the upper end portion 104 of the waterproof sheet 72 is disposed at a position corresponding to the upper end portion 74 of the outer wall drainer 70, and the lower end portion 106 of the waterproof sheet 72 is constructed from the folded portion 98 at the lower end portion 78 of the outer wall drainer 70. It is arranged on the upper side. That is, the waterproof sheet 72 has a substantially crank shape in cross section perpendicular to the longitudinal direction, like the outer wall drainer 70. A gap 134 is provided between the inner surface of the building at the lower end portion 106 of the waterproof sheet 72 and the outer surface 54 of the building at the notch portion 50 of the lower floor outer wall surface material 42.

  A through hole 110 penetrating in the plate thickness direction is formed at a position corresponding to the mounting hole 92 of the outer wall drainer 70 and the through hole 96 of the spacer 94 in the upper end portion 104 of the waterproof sheet 72. A tapping 114 is inserted into the through hole 110, the mounting hole 92 of the outer wall drainer 70, the through hole 96 of the spacer 94, and the fastening hole 112 formed in the outer vertical wall portion 24 of the outer wall frame 18. It is concluded. Therefore, the outer wall drainer 70 and the spacer 94 and the waterproof sheet 72 attached to the outer wall drainer 70 are fixed to the outer wall frame 18.

  As shown in FIG. 6, the outer wall drainer 70 includes a first outer wall drainer 116, a second outer wall drainer 118, and a third outer wall drainer 120. The first outer wall drainer 116 is formed in a straight line shape in a plan view of the building, and stepped portions 122 are formed at both ends in the horizontal direction (longitudinal direction), that is, at one end 117 and the other end 119. . The uneven portion 122 extends in parallel with the general portion 124 of the first outer wall drainer 116, and the thickness of the first outer wall drainer 116 and the thickness of the waterproof sheet 72 are matched with respect to the general portion 124. Offset by the dimension to the inside of the building.

  The second outer wall drainer 118 includes a second outer wall drainer 118A that is formed linearly in a plan view of the building, and a second outer wall that is provided at the protruding corner of the unit building 10 and is formed in an L shape in the plan view of the building. A drainer 118B and a second outer wall drainer 118C (see FIG. 3), a second outer wall drainer 118D (see FIG. 4) provided in the corner of the unit building 10 and formed in an L shape in plan view of the building, The second outer wall drainer 118E is provided over three adjacent surfaces in the building unit 12 and is formed in a substantially U shape in a plan view of the building. One end 126 in the horizontal direction (longitudinal direction) of these second outer wall drainers 118 (118A, 118B, 118C, 118D and 118E) has a second outer wall relative to the general part 125 on the side where the one end 126 is provided. A stepped portion 123 is formed that is offset to the inner side of the building by the dimension of the thickness of the drainer 118 and the thickness of the waterproof sheet 72 and extends in parallel to the general portion 125. In addition, the other end 128 opposite to the one end 126 in the second outer wall drainer 118A is disposed on substantially the same plane as the general portion 125. Further, the other end 128 of the second outer wall drainer 118B, 118C, 118D, 118E on the side opposite to the one end 126 is substantially flush with the general part 127 on the second outer wall drainer 118 side where the other end 128 is provided. Is placed on top.

  The third outer wall drainer 120 is provided at the corner of the unit building 10 and is formed in an L shape in a plan view of the building. Both end portions in the horizontal direction (longitudinal direction) of the third outer wall drainer 120, that is, the one end portion 130 and the other end portion 132 are arranged on substantially the same plane as the general portions 129 and 131 in which the respective end portions are formed. Has been.

  Next, the outer wall draining method of the unit building 10 described above will be described.

  The unit building 10 has seven upper floor units 14 as an example, and the upper floor units 14 are arranged in a substantially L shape in a plan view of the building. When the upper floor unit 14 is arranged, the upper floor units 14 are suspended and installed on the lower floor unit 40 one by one in the building site (see FIG. 1). Each of the plurality of upper floor side units 14 is provided with a first outer wall drainer 116, a second outer wall drainer 118, and a third outer wall drainer 120 in advance in the factory. By placing on the side unit 40, the first outer wall drainer 116, the second outer wall drainer 118, and the third outer wall drainer 120 are arranged between the upper floor outer wall surface material 16 and the lower floor outer wall surface material 42. Established. The lower wall portion 80 of each of the first outer wall drainer 116, the second outer wall drainer 118, and the third outer wall drainer 120 is housed in the notch 50 of the lower floor outer wall surface material 42. At this time, the upper floor unit 14 provided with the first outer wall drainer 116 is first placed on the lower floor unit 40. This step corresponds to the “first step” recited in claim 8.

  After the upper floor unit 14 provided with the first outer wall drainer 116 is placed on the lower floor unit 40, the position adjacent to the upper floor unit 14 provided with the first outer wall drainer 116 (first outer wall The upper floor side unit 14 provided with the second outer wall drainer 118B is disposed on the other end 119 side of the drainer 116). The second outer wall drainer 118B has an other end portion 128 from the outside of the building to the other end portion 128 where the stepped portion 123 of the second outer wall drainer 118 is not formed at the stepped portion 122 of the other end portion 119 of the first outer wall drainer 116. It is arranged in a direction that includes the waterproof sheet 72 provided at 128 and is overlaid. This step corresponds to the “second step” described in claim 8.

  Next, the upper floor unit 14 provided with the second outer wall drainer 118C is positioned adjacent to the upper floor unit 14 provided with the second outer wall drainer 118B (one end 126 side of the second outer wall drainer 118B). Be placed. Further, the upper floor unit 14 provided with the second outer wall drainer 118D is located at a position adjacent to the upper floor unit 14 provided with the second outer wall drainer 118C (one end 126 side of the second outer wall drainer 118C). Be placed. Further, the upper floor unit 14 provided with the second outer wall drainer 118E is disposed at a position adjacent to the upper floor unit 14 provided with the second outer wall drainer 118D (one end 126 side of the second outer wall drainer 118D). Is done. Furthermore, the upper floor unit 14 provided with the second outer wall drainer 118A is located at a position adjacent to the upper floor unit 14 provided with the second outer wall drainer 118E (one end 126 side of the second outer wall drainer 118E). Be placed. When these upper floor side units 14 are disposed, they are disposed behind the stepped portion 123 formed at one end 126 of the second outer wall drainer 118 of the upper floor side unit 14 disposed earlier. The other end portion 128 of the second outer wall drainer 118 of the upper floor unit 14 including the waterproof sheet 72 provided on the other end portion 128 is overlapped from the outside of the building. This step corresponds to the “third step” described in claim 8.

  Between the upper floor unit 14 provided with the second outer wall drainer 118A and the upper floor unit 14 provided with the first outer wall drainer 116, the upper floor unit 14 provided with the third outer wall drainer 120 is provided. Be placed. The horizontal one end portion 130 of the third outer wall drainer 120 includes a waterproof sheet 72 provided at the one end portion 130 from the outside of the building to the stepped portion 123 formed at the one end portion 126 of the second outer wall drainer 118A. The other end 132 in the horizontal direction of the third outer wall drainer 120 is overlapped with the stepped portion 122 formed at one end 117 of the first outer wall drainer 116 from the outside of the building to the other end 132. The waterproof sheet 72 provided is overlaid. This step corresponds to a “fourth step” described in claim 8.

  Next, the operation and effect of this embodiment will be described.

  According to the present embodiment, as shown in FIG. 2, the outer wall drainer 70 is provided outside the building of the waterproof sheet 72, and the upper floor outer wall surface material 16 and the lower wall member 16 are separated by the outer wall drainer 70 and the waterproof sheet 72. Water is prevented from entering the inside of the building through the space between the outside floor wall materials 42. Further, the outer wall drainer 70 has an upper wall portion 76 disposed on the back surface side of the upper floor outer wall surface material 16 and a lower wall portion 80 disposed in the notch portion 50 of the lower floor outer wall surface material 42. Thus, the amount of the outer wall drainer 70 exposed outside the building and the amount of the outer wall drainer 70 protruding from the lower floor outer wall surface material 42 are reduced. Therefore, the outer wall drainer 70 can be made inconspicuous from the outside of the building. Thereby, the fall of external appearance quality can be suppressed.

  Moreover, since the folding | returning part 98 is provided in the lower end part 78 of the outer wall drainer 70, the rigidity of the outer wall drainer 70 is improved. Therefore, deformation of the outer wall drainer 70 can be suppressed.

  Further, since the folded-back portion 98 is provided at the lower end portion 78 of the outer wall drainer 70, when the outer wall drainer 70 is looked up from the outside of the building, the lower wall portion 80 of the outer wall drainer 70 and the lower floor outer wall surface material 42 are provided. The gap 134 between the cutout portion 50 and the building outer surface 54 is difficult to see. That is, appearance quality can be improved.

  Furthermore, since the lower end portion 78 of the outer wall drainer 70 is provided with a folded portion 98, the water flows along the design surface 52 of the outer wall member 42 on the lower floor by being blown by the wind. Even in this case, the folded portion 98 suppresses the further upward flow of the building. Even if water enters between the lower end portion 78 of the outer wall drainer 70 and the building outer surface 54 of the cutout portion 50, the lower end portion 78 of the outer wall drainer 70 and the upper end surface of the lower floor outer wall material 42 Since they are separated, water does not enter the building immediately. Therefore, it is possible to suppress the water flowing toward the upper side of the building from entering the building through the space between the upper floor outer wall surface material 16 and the lower floor outer wall surface material 42.

  In addition, since the building outer side surface of the lower wall portion 80 of the outer wall drainer 70 and the design surface of the lower floor outer wall surface material 42 are arranged on substantially the same plane, the outer wall drainer 70 is substantially separated from the lower floor outer wall surface material 42. The structure does not protrude. Therefore, it can be a clean building exterior.

  Further, the vertical dimension of the lower wall portion 80 of the outer wall drainer 70 is substantially the same as the vertical dimension of the portion of the window frame (not shown) provided in the unit building 10 that extends along the horizontal direction. Therefore, since the window frame and the outer wall drainer 70 have a unified appearance, the appearance quality can be improved.

  Furthermore, since the waterproof sheet 72 is attached to the inside surface of the outer wall drainer 70, the work of attaching the waterproof sheet 72 to the building and the task of attaching the outer wall drainer 70 to the building unit 12 can be performed simultaneously. Therefore, it is possible to reduce the number of assembling work steps.

  Further, since a gap 134 is provided between the waterproof sheet 72 and the building outer surface 54 in the cutout portion 50 of the lower-floor outer wall surface material 42, the inside or outside of the unit building 10 is provided via the gap 134. Air can flow through. That is, it is possible to suppress the intrusion of water into the building while ensuring the air permeability of the unit building 10.

  Furthermore, the outer wall drainer 70 provided over the entire circumference of the unit building 10 is composed of a first outer wall drainer 116, a second outer wall drainer 118, and a third outer wall drainer 120. Moreover, since the site | part where the 1st outer wall drainer 116, the 2nd outer wall drainer 118, and the 3rd outer wall drainer 120 are each overlapped is made into the uneven parts 122 and 123, the site | part overlapped is a building. It does not protrude outward. Therefore, it is possible to suppress the intrusion of water into the building through the space between the upper-floor outer wall surface material 16 and the lower-floor outer wall surface material 42 in the entire circumference of the unit building 10 while maintaining a clean building appearance.

  Furthermore, since the spacer 94 is provided in the part fastened by the tapping 114 in the outer wall drainer 70, the rigidity of the part in the outer wall drainer 70 is improved by the spacer 94. Therefore, deformation of the outer wall drainer 70 due to the tapping 114 can be suppressed during fastening.

  Further, since the thickness of the spacer 94 provided on the outer wall drainer 70 is substantially the same as the thickness of the outer wall drainer 70, the building outer surface of the steps 122 and 123 of the outer wall drainer 70 and the building of the spacer 94 are provided. The outer side surface is arranged on substantially the same plane. Therefore, since the outer wall drainer 70 is brought into contact with the outer wall frame 18 substantially uniformly, rattling of the outer wall drainer 70 can be suppressed.

  Further, when the outer wall drainer 70 is provided on the entire circumference of the unit building 10, the first outer wall drainer 116 is provided between the upper floor outer wall member 16 and the lower floor outer wall member 42, and then a plurality of second outer wall drainers 118 are provided. By providing the upper floor outer wall material 16 and the lower floor outer wall material 42 and finally providing the third outer wall drainer 120 between the upper floor outer wall material 16 and the lower floor outer wall material 42, Since one of the portions where the outer wall drainer 116, the second outer wall drainer 118 and the third outer wall drainer 120 are overlapped becomes the stepped portions 122 and 123, the overlapped portion protrudes outward from the building. There is nothing to do. Therefore, it is possible to suppress the intrusion of water into the building through the space between the upper-floor outer wall surface material 16 and the lower-floor outer wall surface material 42 in the entire circumference of the unit building 10 while maintaining a clean building appearance.

  Furthermore, since the outer wall drainer 70 is attached in advance to the upper floor unit 14 in the factory, the outer wall drainer 70 can be attached to the upper floor unit 14 with high accuracy, so that the quality can be improved. Further, since the outer wall drainer 70 is made of metal or resin, the shape in which the lower wall portion 80 of the outer wall drainer 70 is arranged in the cutout portion 50 of the lower floor outer wall surface material 42 is maintained. By installing the upper floor side unit 14 on the lower floor side unit 40, the lower wall portion 80 of the outer wall drainer 70 can be accommodated in the cutout portion 50 of the lower floor outer wall surface material 42. In other words, since work on site can be reduced, the construction period can be shortened.

  In the present embodiment, the outer wall drainer 70 is made of an aluminum alloy. However, the outer wall drainer 70 is not limited to this, and may be made of another thin material such as stainless steel or resin.

  Moreover, although the building outer side surface of the lower wall part 80 of the outer wall drainer 70 is arranged on the substantially same plane as the design surface 52 of the lower floor outer wall surface material 42, the present invention is not limited to this, and slightly protrudes from the design surface 52. Alternatively, it may be provided somewhat inside the building from the design surface 52.

  Furthermore, the portion where the first outer wall drainer 116, the second outer wall drainer 118, and the third outer wall drainer 120 are overlapped is configured to include the waterproof sheet 72, respectively. Only the first outer wall drainer 116, the second outer wall drainer 118, and the third outer wall drainer 120 may be overlapped, and the waterproof sheet 72 may be overlapped at another part. The waterproof sheet 72 may be continuous over the circumference.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above, and various modifications other than those described above can be implemented without departing from the spirit of the present invention. Of course.

10 unit building 14 upper floor unit 16 upper floor outer wall material 18 outer wall frame 40 lower floor unit 42 lower floor outer wall material 48 upper end side 50 notch 52 design surface 70 outer wall drainer 72 waterproof sheet 74 upper end 76 upper wall Part 78 Lower end part 80 Lower wall part 94 Spacer 98 Folded part 104 Upper end part 114 Tapping (fastener)
116 First outer wall drainer 117 One end (one of both ends in the horizontal direction of the first outer wall drainer 116)
118 Second outer wall drainer 119 The other end (the other of the both ends in the horizontal direction of the first outer wall drainer 116)
120 Third outer wall drainer 122 Stepped portion 123 Stepped portion 124 General portion 125 General portion 126 One end portion 127 General portion 128 Other end portion 129 General portion 130 One end portion (one of both end portions in the horizontal direction of the third outer wall drainer 120)
131 General part 132 The other end part (the other of the both ends in the horizontal direction of the third outer wall drainer 120)

Claims (9)

An upper floor outer wall surface material provided on the outer side of the upper floor unit placed on the upper floor side of the unit building constructed in a plurality of floors;
The lower floor unit, which is disposed on the lower floor side of the unit building and directly below the upper floor unit, is provided on the exterior side of the building, and a part of the design surface on the upper end side is cut in the thickness direction. A lower-floor outer wall material having a cut-out portion, and
A waterproof sheet in which an upper end portion is attached to an outer wall frame holding the upper floor outer wall surface material, and a lower end portion is disposed on the building outer side of the notch portion of the lower floor outer wall surface material,
Provided on the exterior side of the waterproof sheet and formed in a plate shape, the upper wall portion extending from the upper end portion to the building lower side is disposed on the back side of the upper floor outer wall surface material and from the lower end portion An outer wall drainer in which a lower wall portion extending to the upper side of the building is disposed in a notch portion of the lower floor outer wall surface material;
External wall draining structure. The lower end of the outer wall drainer is provided with a folded portion that is folded toward the inside of the building.
The outer wall draining structure according to claim 1. The building outer surface in the lower wall portion of the outer wall drainer is disposed on substantially the same surface as the design surface of the lower floor outer wall material,
The outer wall draining structure according to claim 1 or 2. The waterproof sheet is attached to the inner surface of the outer wall drainage building,
The outer wall draining structure according to any one of claims 1 to 3. A gap is provided between the waterproof sheet and the building outer surface at the notch of the lower floor outer wall surface material,
The outer wall draining structure according to claim 4. The outer wall drainer is
A first outer wall drainer that is formed at both ends in the horizontal direction and has a stepped portion disposed on the inner side of the one-stage building with respect to the general part,
A plurality of second outer wall drainers, wherein the stepped portion is formed at one end in the horizontal direction and the other end on the opposite side of the one end is formed on substantially the same plane as the general portion,
The both ends in the horizontal direction are composed of a third outer wall drainer formed on substantially the same plane as the general part,
The other end of the second outer wall drainer is overlapped with the stepped part of the first outer wall drainer or the second outer wall drainer from the outside of the building, and in the first outer wall drainer The both end portions of the third outer wall drainer are overlapped from the outside of the building respectively on the other stepped portion and the stepped portion of the second outer wall drainer opposed thereto, so that the entire circumference of the unit building is covered. Provided,
The outer wall draining structure according to any one of claims 1 to 5. The outer wall drainer is attached to the outer wall frame through a fastener, and a spacer is provided at a portion fastened by the fastener in the outer wall drainer.
The outer wall draining structure according to any one of claims 1 to 6. An upper floor outer wall surface material provided on the outer side of the upper floor unit placed on the upper floor side of the unit building constructed in a plurality of floors;
The lower floor unit, which is disposed on the lower floor side of the unit building and directly below the upper floor unit, is provided on the exterior side of the building, and a part of the design surface on the upper end side is cut in the thickness direction. A lower-floor outer wall material having a cut-out portion, and
A waterproof sheet in which an upper end portion is attached to an outer wall frame holding the upper floor outer wall surface material, and a lower end portion is disposed on the building outer side of the notch portion of the lower floor outer wall surface material,
Provided on the exterior side of the waterproof sheet and formed in a plate shape, the upper wall portion extending from the upper end portion to the building lower side is disposed on the back side of the upper floor outer wall surface material and from the lower end portion A lower wall portion extending to the upper side of the building is arranged in the cutout portion of the lower floor wall material, and is formed at both ends in the horizontal direction and arranged on the inner side of the one-stage building with respect to the general portion. The first outer wall drainer in which the stepped portion is formed, the stepped portion is formed at one end in the horizontal direction, and the other end on the opposite side of the one end is substantially flush with the general portion. An outer wall drainer composed of a plurality of second outer wall drainers formed, and a third outer wall drainer whose both ends in the horizontal direction are formed on substantially the same plane as the general part,
Applied to the external wall drainage structure with
A first step of disposing the first outer wall drainer between the upper floor outer wall material and the lower floor outer wall member; and the step of the first outer wall drainer at the stepped portion of the second outer wall drainer. A second step of overlapping the other end portion from the outside of the building and disposing the second outer wall drainage between the upper floor outer wall surface material and the lower floor outer wall surface material, and the second outer wall draining The other end portion of the other second outer wall drainer is overlapped with the stepped portion of one end portion from the outside of the building, and the second outer wall drainer is placed between the upper floor outer wall surface material and the lower floor outer wall surface material. And the third step of disposing the third outer wall drainer in the horizontal direction to the stepped part of the first outer wall drainer and the stepped part of the second outer wall drainer opposed thereto The third outer wall drainer is overlapped from the side and provided between the upper floor outer wall material and the lower floor outer wall material. And a step, the,
External wall drainer installation method. The outer wall drainer is made of metal or resin, and the upper wall portion of the outer wall drainer is previously attached to the outer wall frame of the upper floor unit in the factory, and the upper floor unit is constructed. Transported to the ground and suspended and installed on the lower floor side unit in the building, and the lower wall portion of the outer wall drainer is stored in the notch portion of the lower floor outer wall surface material,
The outer wall draining method according to claim 8.

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