JP5877176B2 - Waterproof structure of building - Google Patents

Description

  The present invention relates to a waterproof structure of a building, and more particularly to a waterproof structure of a building including an exterior member in which a primary water stop treatment is applied to joints between adjacent surface members.

  A joint of an exterior member such as an outer wall of a building is provided with a wet or dry water sealing material (including a gasket) in order to prevent intrusion of rainwater or the like into the indoor side. In order to increase the water-stopping property of the exterior member, there is a building where the secondary water-stopping treatment is applied to the joint. On the other hand, there are many buildings where only primary water stop treatment is applied to joints. In the latter building, water leakage to the indoor side can occur.

  Therefore, in order to solve the problem of water leakage in the exterior member, as disclosed in Japanese Patent Application Laid-Open No. 2007-146539 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2001-140365 (Patent Document 2), there is a technique for repairing joints. Proposed.

  In addition, there is a building in which a draining metal is arranged on the back side of the exterior member in advance when the building is constructed. In such a building, as disclosed in Japanese Patent Application Laid-Open No. 2004-156313 (Patent Document 3), the water that has been prevented from entering the indoor side by the draining hardware is allowed to flow into a special wall with a lower wall sandwiching the joint. An outer wall joint structure has also been proposed that can be discharged to the outside through a gap between the shape of the dry joint material.

JP 2007-146539 A JP 2001-140365 A JP 2004-156313 A

  Even if the joint is repaired as in Patent Documents 1 and 2 when water leakage of the exterior member occurs, it is difficult to maintain waterproofness for a long period of time. It is also conceivable that water enters the exterior member from a location other than the joint. In such a case, it is common to seal to a place where there is a possibility of water leakage. Therefore, when a water leak location cannot be specified, it is necessary to repair a large area in the exterior member.

  Moreover, in patent document 3, although the water which permeated the indoor side can be discharged | emitted to the outdoor side, the dry joint material of a special shape is arrange | positioned instead of a water stop sealing material to a horizontal joint. Therefore, such a structure of the outer wall joint is not suitable for the renovation work performed as a measure against water leakage of the exterior member subjected to the primary water stop treatment.

  The present invention has been made to solve the above-described problems, and the object of the present invention is a building that can be realized by water leakage repair work for exterior members including joints that have undergone primary water stop treatment. It is to provide a waterproof structure.

  The waterproof structure of a building according to an aspect of the present invention includes an exterior space including a plurality of surface members adjacent in the vertical direction and a waterproof seal member provided in a horizontal joint located between the adjacent surface members, and an outdoor space. In a waterproof structure of a building that is partitioned from an indoor space, the water that has entered the indoor side through the exterior member is received, and the received intrusion water is guided from the lateral joint to the outside through the exterior member. A drainage path forming member is provided.

  Preferably, the plurality of surface members include a first surface member and a second surface member disposed adjacent to and below the first surface member, and the drainage path forming member is a drainer that receives intrusion water. And a drainage guide member that guides intrusion water received by the draining member from a horizontal joint between the first surface member and the second surface member to the outside.

  Preferably, the draining member includes a water receiving portion disposed on the back surface side of the first surface member, a draining bottom wall portion disposed so as to close the upper end surface of the second surface member, and a draining bottom wall portion. And a standing wall portion that rises from the indoor side end portion to the downstream end portion of the water receiving portion. Further, the drainage guide member has a bottom wall placed on the drained bottom wall portion and a rear wall that comes into contact with the surface on the outdoor side of the standing wall portion. It is desirable that a drainage path for water transmitted from the receiving part is formed. In this case, in the said horizontal joint, a water stop sealing material may be provided between the lower end surface of a 1st surface member, and the bottom wall of a drainage guide member.

  It is desirable that at least one drainage groove is provided as a drainage path on the rear surfaces of the rear wall and the bottom wall of the drainage guide member.

  The drainage guide member may be provided partially along the draining member extending in the lateral direction. In this case, it is desirable that the first dry waterproof sealing material having substantially the same thickness as the rear wall of the drainage guide member is disposed on both lateral sides with the drainage guide member interposed therebetween.

  Furthermore, it is desirable that the second dry waterproof seal material is continuously disposed in the lateral direction on the outdoor guide surface of the drainage guide member and the first dry waterproof seal material.

  It is desirable that the rear wall of the drainage guide member has a height equal to or higher than the height of the standing wall portion of the draining member.

  Moreover, it is desirable that the bottom wall of the drainage guide member is disposed so as to protrude to the outdoor side from the upper end portion of the first surface member.

  According to the present invention, the intrusion water that has entered the indoor side through the exterior member provided with the water sealing material on the horizontal joint is guided from the horizontal joint to the outdoors by the drainage path forming member. The structure of a building including such a drainage path forming member can also be realized by a water leakage repair work for an exterior member in which a primary water stop treatment is applied to a horizontal joint.

It is sectional drawing which shows the outline | summary of the waterproofing structure of the building which concerns on embodiment of this invention. It is a schematic cross section which shows typically the waterproofing structure of the building which concerns on embodiment of this invention. It is a perspective view which shows the draining member of the drainage path formation member in embodiment of this invention. It is a perspective view which shows the drain plate (drainage guide member) of the drainage path formation member in embodiment of this invention. It is a figure which shows the example of arrangement | positioning of the drainage path formation member in embodiment of this invention. It is a figure which shows the example of attachment of the dry-type waterproof sealing material of the 1st layer in embodiment of this invention. It is a figure which shows the example of attachment of the dry-type waterproof sealing material of the 2nd layer in embodiment of this invention. It is sectional drawing which shows the outline | summary of the general waterproof structure of a building.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  In the building according to the present embodiment, the outdoor space and the indoor space are partitioned by an exterior member in which a water-stop sealing material is provided as a primary water-stop means on a horizontal joint or a vertical joint. The waterproof structure in the part including such an exterior member will be described below. In the present embodiment, a waterproof structure between floors of a building, that is, a trunk difference part will be described as an example.

  First, prior to the description of the waterproof structure of the trunk difference portion in the present embodiment, the waterproof structure of the trunk difference portion subjected to only the primary water-stopping process will be briefly described as a general waterproof structure.

<General waterproof structure>
FIG. 8 is a cross-sectional view showing an outline of a general waterproof structure in a trunk difference portion of a building.

  Referring to FIG. 8, an exterior member 101 that partitions an outdoor space and an indoor space includes, as a plurality of surface members, an outer wall material 11 on the upper floor, a torso surface material 12, and an outer wall material 13 on the lower floor. Is included. On the back side of the trunk difference face material 12, a trunk difference 23 is arranged at an interval. On the back side of the outer wall surface materials 11 and 13, heat insulating materials 24 and 25 are arranged. The outer wall surface materials 11 and 13 are attached to the panel frames 28 and 29 via the base materials 26 and 27, respectively. The base material 26 extends downward so as to overlap the upper end portion of the trunk difference surface material 12, and the base material 27 extends upward so as to overlap the lower end portion of the trunk difference surface material 12.

  In this case, the horizontal joints 21 and 22 positioned between the surface members adjacent in the up-down direction are closed by, for example, wet water-stop sealing materials (hereinafter abbreviated as “seal materials”) 14 and 15. The exterior member 101 is subjected only to the primary water stop treatment with the sealing materials 14 and 15.

  In such a building, due to deterioration of the sealing materials 14 and 15, water may leak beyond the sealing materials 14 and 15 (primary water stop) to the back side space of the trunk difference face material 12. Alternatively, water may leak from portions other than the horizontal joints 21 and 22. When water leakage occurs, in the general waterproof structure as shown in FIG. 8, the intrusion water that has entered the back space of the trunk difference face member 12 has no escape path. Therefore, if water leaks, renovation work is required. As a general renovation work, as described above, the sealing members 14 and 15 of the horizontal joints 21 and 22 are reinforced, the surface members 11 to 13 of the surface members 11 to 13 that may leak, and other vertical joints. Refurbishment is performed.

  On the other hand, in this Embodiment, it is supposed that the drainage path | route of the intrusion water which permeated into the back side space of the trunk | drum difference face material 12 will be formed by repair work. Below, the waterproofing structure of the building in which such a drainage route of intrusion water was formed is demonstrated in detail.

<Waterproof structure according to the present embodiment>
(About overview)
FIG. 1 is a sectional view showing an outline of a waterproof structure for a building according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing an enlarged main part of the waterproof structure for a building according to the embodiment of the present invention. In addition, the building frame structure itself in the present embodiment is the same as the building shown in FIG. Therefore, the same or corresponding portions as those in the configuration shown in FIG. Therefore, detailed description thereof will not be repeated.

  With reference to FIG. 1 and FIG. 2, the drainage channel | path formation member 2 is provided in the building which concerns on this Embodiment. The drainage path forming member 2 receives the water that has entered the indoor side through the exterior member 1 and guides the received intrusion water from the lateral joint 22 to the outdoors. The exterior member 1 includes an upper wall member 11 on the upper floor, a trunk difference surface member 12, and an outer wall member 13 on the lower floor, similarly to the structure of the exterior member 101 shown in FIG. In the repair work, for example, the trunk difference face material 12 is removed, and the drainage path forming member 2 is installed.

  As shown in FIG. 2, the drainage path forming member 2 mainly includes a draining member 3 and at least one drainage plate 4. The draining member 3 receives the intrusion water that has passed through the exterior member 1 and prevents the intrusion water from further entering the indoor side. The drainage plate 4 is a drainage guide member that guides intrusion water received by the draining member 3 from the horizontal joint 22 to the outside. The draining member 3 extends on the back side of the trunk difference face member 12 from the one end to the other end in the direction in which the trunk difference 23 extends, ie, in the lateral direction. The drain plate 4 is partially provided along the draining member 3. The draining member 3 may be formed by connecting a plurality of hardware in the horizontal direction. In this case, the drainage plate 4 is disposed at a location where there is no joint (connection portion) of the draining member 3.

  Here, a configuration example of the drainage path forming member 2 will be described.

(Configuration example of drainage path forming member)
FIG. 3 is a perspective view showing the draining member 3 of the drainage path forming member 2. FIG. 4 is a perspective view showing the drainage plate 4 of the drainage path forming member 2. FIG. 5 is a diagram illustrating an arrangement example of the drainage path forming member 2.

  With reference to FIGS. 2 and 3, the draining member 3 includes a draining surface portion 31, a water receiving portion 32, a standing wall portion 33, and a bottom wall portion 34. The draining surface portion 31 is disposed on the back side of the trunk difference surface material 12 and extends in the vertical direction with a gap from the trunk difference surface material 12. The water receiving portion 32 is disposed on the back side of the trunk difference face member 12, and the indoor side end portion of the water receiving portion 32 is connected to the draining surface portion 31. The water receiving part 32 has, for example, a water receiving surface extending in the horizontal direction, and the outdoor side end part is on the downstream side. The bottom wall portion 34 is disposed so as to close the upper end surface of the outer wall surface material 13. The bottom wall portion 34 may protrude outward from the upper end portion of the outer wall surface material 13. The standing wall portion 33 rises from the indoor side end portion of the bottom wall portion 34 to the downstream end portion of the water receiving portion 32. Such a draining member 3 is formed, for example, by bending a thin metal plate.

  In the present embodiment, since the lower base material 27 protrudes to the trunk difference surface material 12 side on the back side of the exterior member 1, the back surface of the standing wall portion 33 contacts the surface of the base material 27 on the outdoor side. It is touched. In this case, the water receiver 32 may be placed on the upper end surface of the base material 27. In such a state, the draining member 3 is fixed to the lower end portion of the upper base material 26 by a plurality of fixing brackets 35, for example. In the present embodiment, the upper end portion 31 a of the draining surface portion 31 is bent indoors so as to engage with the outdoor side end surface of the upper flange 23 a of the trunk difference 23, and has a shape that receives water leakage from the outer wall surface material 11. .

  Referring to FIGS. 2 and 4, drain plate 4 includes a rear wall 41 and a bottom wall 42 and has, for example, a substantially L shape. The drain plate 4 is made of resin, for example. The rear wall 41 is in contact with the surface on the outdoor side of the standing wall portion 33 of the draining member 3. The rear wall 41 has a height equal to or higher than the height of the standing wall portion 33 of the draining member 3. That is, the rear wall 41 protrudes upward from the downstream end portion of the water receiving portion 32. The bottom wall 42 is placed on the bottom wall portion 34 of the draining member 3. The bottom wall 42 preferably projects outward from the upper end of the outer wall surface material 13. When the bottom wall portion 34 of the draining member 3 protrudes to the outdoor side from the upper end portion of the outer wall surface material 13, the bottom wall 42 preferably extends beyond the outdoor side edge of the bottom wall portion 34. .

  The rear wall 41 and the bottom wall 42 are formed with a drainage path for water transmitted from the water receiving portion 32 of the draining member 3. Specifically, for example, a plurality of drain grooves 43 are provided on the back surfaces of the rear wall 41 and the bottom wall 42 as drain paths. Note that at least one drainage groove 43 may be provided.

  When the drainage plate 4 is partially disposed along the draining member 3, as shown in FIG. 5, two dry waterproof sealing materials 51 and 52 having a length in the lateral direction are further provided. The dry waterproof sealing materials 51 and 52 are made of a compressible elastic body, and the material thereof is, for example, foam rubber. The surfaces of the dry waterproof sealing materials 51 and 52 are smooth skin layers. Adhesive is added to the back surfaces of the dry waterproof seal materials 51 and 52 in advance. As the dry waterproof seal materials 51 and 52, for example, EPT SEALER (registered trademark) manufactured by Nitto Denko Corporation may be used.

  An example of attachment of the dry waterproof sealing materials 51 and 52 will be described with reference to FIGS. As shown in FIG. 6, the first-layer dry waterproof sealing material 51 is affixed to the outdoor side surface of the standing wall 33 of the draining member 3 without gaps on both sides in the lateral direction with the drainage plate 4 interposed therebetween. Thereby, either the drainage plate 4 or the dry waterproof seal material 51 is arranged on the outdoor side surface of the standing wall portion 33 of the draining member 3 in the lateral direction. The thickness of the dry waterproof seal material 51 is preferably substantially the same as the thickness of the rear wall 41 of the drain plate 4. Further, it is desirable that the upper end of the dry waterproof sealing material 51 is arranged so as to substantially coincide with the upper end edge of the standing wall portion 33 of the draining member 3 or the upper end portion of the drainage plate 4. The dry waterproof sealing material 51 may be disposed such that the upper end thereof is located between the upper end edge of the standing wall portion 33 and the upper end portion of the drainage plate 4. The seam in the horizontal direction of the dry waterproof sealing material 51 is disposed so as not to overlap the seam of the draining member 3.

  As shown in FIG. 7, the second-layer dry waterproof seal material 52 is continuously pasted in the lateral direction on the outdoor side surfaces of the drain plate 4 and the dry waterproof seal material 51. As shown in FIG. 2, the dry waterproof sealing material 52 is sandwiched and compressed between the back surface of the trunk difference surface material 12 and the drain plate 4 or the dry waterproof sealing material 51. Thereby, shakiness of the drainage plate 4 and distortion of the dry waterproof sealing material 51 can be prevented. The horizontal seam of the dry waterproof seal material 52 is arranged so as not to overlap the boundary between the drainage plate 4 and the dry waterproof seal material 51 and the seam between the dry waterproof seal materials 51.

  In the present embodiment, the two dry waterproof sealing materials 51 and 52 are of the same type, but may be of different types. For example, these thicknesses may be different. Alternatively, only the dry waterproof seal material 52 of the second layer may be compressible.

  When the drainage path forming member 2 as described above is provided in the trunk difference portion, a part of the drainage path formation member 2 protrudes to the side joint 22 side. A space between the end surface and a part of the drainage path forming member 2 protruding to the side joint 22 side is closed by the sealing material 15A. Specifically, the sealing material 15 </ b> A is provided on the bottom wall 42 of the drain plate 4 at the place where the drain plate 4 is disposed. That is, the joint space surrounded on three sides by the lower end surface of the trunk difference surface material 12 and the bottom wall 42 and the rear wall 41 of the drain plate 4 is closed by the sealing material 15A. In a place where the drainage plate 4 is not disposed, the sealing material 15 </ b> A is disposed on the bottom wall portion 34 of the draining member 3. That is, the joint space surrounded on three sides by the lower end surface of the trunk difference surface material 12 and the bottom wall portion 34 and the standing wall portion 33 of the draining member 3 is closed by the sealing material 15A.

  According to the waterproof structure of the trunk difference portion described above, intrusion water beyond the primary water stop portion (seal members 14 and 15) or intrusion water from an arbitrary water leakage portion is the water receiving portion of the draining member 3. Received by 32. As described above, the rear wall 41 of the drainage plate 4 protrudes upward from the downstream (outdoor side) end of the water receiving portion 32, and the location where the drainage plate 4 is not disposed in the lateral direction is Water is stopped by dry waterproof sealing materials 51 and 52. Therefore, even if the water receiving surface of the water receiving portion 32 extends in the horizontal direction, the intrusion water naturally flows toward the drainage plate 4 as shown in FIG. On the back surface of the rear wall 41 of the drain plate 4, a plurality of drain grooves 43 that extend through the back surface of the bottom wall 42 to the outdoor side end surface of the bottom wall 42 are provided. Therefore, the intrusion water is drained to the outside through these drainage grooves 43.

  Therefore, even if it is the exterior member 1 in which the secondary water stop process is not performed, it can prevent that intrusion water retains in indoor space. Further, since the drainage path forming member 2 having a simple configuration is used, the repair work can be easily performed. That is, the above-described waterproof structure can be realized by water leakage repair work for the exterior member. Further, even if rainwater enters the back side from the lower end portion of the trunk difference surface material 12 due to deterioration of the sealing material 15 </ b> A of the horizontal joint 22, the dry waterproof sealing materials 51, 52 move it upward. Water leakage can be prevented.

  In the present embodiment, the drain plate 4 is partially provided in the lateral direction, but the drain plate may extend from one end to the other end of the draining member 3 in the lateral direction. In that case, since it is not necessary to consider the gaps on both sides of the drainage plate, the first-layer dry waterproof sealing material 51 may not be provided.

  In addition, the water receiving portion 32 of the draining member 3 has a horizontal water receiving surface, but the water receiving surface is not limited to a horizontal plane as long as the outdoor side end portion is the downstream side. In that case, although the draining member 3 has both the draining surface part 31 and the water receiving part 32, it should just have a water receiving part at least. For example, one curved or inclined water receiving portion that extends from the lower end of the upper base material 26 to the upper end of the standing wall portion 33 of the draining member 3 may be provided.

  Moreover, although the waterproof structure of the trunk difference part was demonstrated to the example in this Embodiment, the site | part in which a drainage path formation member is provided is not limited to a trunk difference part. For example, a drainage path forming member can be provided as a measure against water leakage in a portion having an exterior member that is not subjected to secondary waterstop treatment for the horizontal joint.

  Further, the installation of the drainage path forming member is not limited to the leakage countermeasure for the exterior member having only the primary water stopping function, but is effective as a leakage countermeasure for the exterior member having the secondary water stopping function.

  In the present embodiment, the drainage path forming member is installed by the leakage repair work for the exterior member, but the drainage path forming member may be installed in advance when the building is constructed.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1,101 exterior member, 2 drainage path forming member, 3 draining member, 4 drainage plate,
11, 13 Outer wall surface material, 12 Body difference surface material, 14, 15, 15A Water sealing material, 21, 22 Horizontal joint, 23 Body difference, 24, 25 Heat insulation material, 26, 27 Base material, 28, 29 Panel frame 31 Water draining surface portion, 32 Water receiving portion, 33 Standing wall portion, 34 Bottom wall portion, 35 Fixing bracket, 41 Rear wall, 42 Bottom wall, 43 Drain groove, 51, 52 Dry waterproof seal material.

Claims (8)

Waterproofing a building in which an outdoor space and an indoor space are partitioned by an exterior member including a plurality of surface members adjacent in the vertical direction and a water-stop sealing material provided at a horizontal joint located between the adjacent surface members In structure
Receiving water that has entered the indoor side through the exterior member, and includes a drainage path forming member that guides the received intrusion water from the lateral joint to the outside through the exterior member ,
The waterproof structure of a building, wherein the drainage path forming member has a drainage groove extending from the indoor space to the outdoor space . The plurality of surface members include a first surface member and a second surface member disposed adjacent to and below the first surface member,
The drainage path forming member includes a drainage member that receives the intrusion water, and the intrusion water received by the drainage member from the horizontal joint between the first surface member and the second surface member to the outside. A drainage guide member that leads to
The waterproof structure for a building according to claim 1 , wherein the drainage groove is formed in the drainage guide member . The draining member includes a water receiving portion disposed on the back surface side of the first surface member, a draining bottom wall portion disposed so as to close an upper end surface of the second surface member, and the draining bottom wall portion. A standing wall portion rising from the indoor side end portion to the downstream end portion of the water receiving portion,
The drainage guide member has a bottom wall placed on the drained bottom wall portion, and a rear wall that comes into contact with a surface on the outdoor side of the standing wall portion, and the bottom wall and the rear wall, The drainage groove is formed as a drainage path for water transmitted from the water receiving portion,
The waterproof structure for a building according to claim 2, wherein, in the horizontal joint, the water sealing material is provided between a lower end surface of the first surface member and the bottom wall of the drainage guide member. The drainage groove, in the rear wall and the rear surface of the bottom wall each of the drain guide member and is kicked at least one set, a waterproof structure of a building according to claim 3. The drainage guide member is partially provided along the draining member extending in the lateral direction,
The waterproof structure for a building according to claim 3 or 4, wherein a first dry waterproof sealing material having substantially the same thickness as a rear wall of the drainage guide member is disposed on both sides in the lateral direction with the drainage guide member interposed therebetween. .   The waterproof structure for a building according to claim 5, wherein a second dry waterproof seal material is continuously arranged in a lateral direction on a surface on the outdoor side of the drainage guide member and the first dry waterproof seal material.   The waterproof structure of a building according to any one of claims 3 to 6, wherein the rear wall of the drainage guide member has a height equal to or higher than a height of the standing wall portion of the draining member.   The waterproof structure for a building according to any one of claims 3 to 7, wherein the bottom wall of the drainage guide member is disposed so as to protrude outward from an upper end portion of the first surface member.

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