JP2012241313A - Outer wall structure - Google Patents

Abstract

To provide an outer wall structure that suppresses intrusion of rainwater between the outer wall materials when the wall materials face each other in the vertical direction and exhibits high waterproofness.
An outer wall structure includes a wall base 2, a first outer wall member 101 and a second outer wall member 102 installed at a position on the outdoor side with respect to the wall base 2, and the wall base 2 and the outer wall members 101, 102. The eye plate material 40 installed at a position between and the guiding means. The first outer wall material 101 and the second outer wall material 102 are arranged close to each other so as to be adjacent in the horizontal direction. The eye plate material 40 is disposed at a position that covers the vertical joint between the first outer wall material 101 and the second outer wall material 102 from the indoor side. Position where the guiding means overlaps the outdoor side or the eye plate material with the flow of water moving along the outer wall from the vertical joint on the upper end surface of at least one of the first outer wall material 101 and the second outer wall material 102 To the indoor side.
[Selection] Figure 1

Description

  The present invention relates to an outer wall structure of a building.

  When a plurality of outer wall materials are installed on the outer wall of a building, intrusion of rainwater or the like into the building body through the back surface side of the outer wall material from a gap between adjacent outer wall materials becomes a problem. Conventionally, various proposals have been made to suppress such intrusion of rainwater.

  For example, in Patent Document 1, a hat-shaped joiner is provided on the vertical joint of the outer wall material, and further, the vertical joint is filled with a seal material to prevent the intrusion of rainwater from the vertical joint. Furthermore, in the technique described in Patent Document 1, the tip of the wing piece of the hat-type joiner is bent and extended in a rectangle in the height direction of the hat-shaped central convex portion, and the bent tip is in contact with the outer wall material. Is done. In Patent Document 1, even when the sealing material is cut in part and damaged, water that has entered the space formed by the blade piece, the tip, and the back of the outer wall is discharged.

JP 2007-70842 A

  However, in the outer wall structure as described above, rainwater may enter the upper end surface of the outer wall material, and this rainwater may further flow down to the back side of the outer wall material. For example, in the technique described in Patent Document 1, rainwater may enter from the vertical joints into the gaps between the outer wall members that are abutted in the vertical direction. If the sealing material is deteriorated, the rainwater is more likely to enter. Become. Rainwater that has entered in this way may flow down to the back side of the outer wall material while flowing toward the opposite side of the joint from the upper end surface of the outer wall material. Then, even if a hat-type joiner is provided as in Patent Document 1, rainwater will flow down to the back side of the outer wall material after passing through the hat-type joiner, which makes it easy for rainwater to enter the building body. End up.

  The present invention has been made in view of the above-described reason, and has an outer wall structure that suppresses the intrusion of rainwater between the outer wall materials into the building body when the outer wall materials are faced in the vertical direction and exhibits high waterproofness. The purpose is to provide.

The outer wall structure according to the present invention includes a wall foundation, a first outer wall material and a second outer wall material installed at positions on the outdoor side with respect to the wall foundation, the wall foundation and the first outer wall material. And eye plate material installed at a position between the second outer wall material, and a guiding means,
The first outer wall material and the second outer wall material are arranged close to each other so as to be adjacent to each other in the horizontal direction, and a vertical joint portion is formed between the two. The joint plate material connects the vertical joint portion from the indoor side. Placed in a covering position,
The guide means moves the water flowing along the outer wall from the vertical joint on the upper end surface of at least one of the first outer wall member and the second outer wall member, on the outdoor side or the eye plate member. Guide to the indoor side at the overlapping position.

In the present invention, there are ridges in the vertical direction in each of the position of the plate material closer to the first outer wall material than the vertical joint portion and the position closer to the second outer wall material than the vertical joint portion. Formed,
The guiding means moves the water flowing along the outer wall from the vertical joint portion on the upper end surface of at least one of the first outer wall member and the second outer wall member, on the outdoor side or the vertical joint portion. It is preferable to guide to the indoor side at a position between the ridge and the ridge.

The outer wall structure according to the present invention includes an outer wall portion composed of the plurality of outer wall materials, and the outer wall portion is installed at a position on the outdoor side with respect to the wall base,
It is preferable that a ventilation space communicating with the outdoors is formed between the wall base and the outer wall portion.

The outer wall structure according to the present invention includes a communication port that connects the ventilation space and the outdoors, and the ratio of the opening area of the communication port to the area of the wall surface of the wall base in the ventilation space is 65 cm ² / m ^2. The above is preferable.

  It is preferable that the outer wall structure according to the present invention further includes a mounting bracket for fixing the outer wall material to the wall base.

  ADVANTAGE OF THE INVENTION According to this invention, the permeation of rain water from between outer wall materials when an outer wall material is faced | matched to an up-down direction to a building body is suppressed, and the outer wall structure which exhibits high waterproofness is implement | achieved.

(A) is a perspective view which shows the positional relationship of the vertical trunk | rim edge, eyeplate material, and attachment bracket in the outer wall structure in the one aspect | mode of embodiment of this invention, (b) is the vertical trunk | rim edge and eyeplate material in the said embodiment. It is a perspective view which shows the positional relationship of a mounting bracket and an outer wall material. It is the partially broken perspective view which shows the outer wall structure in the one aspect | mode of embodiment of this invention. It is a perspective view which shows the attachment metal fitting in the one aspect | mode of embodiment of this invention. It is a perspective view which shows the eyeplate material in the one aspect | mode of embodiment of this invention. It is general | schematic sectional drawing which shows the positional relationship of the vertical trunk edge, eyeplate material, attachment bracket, and outer wall material in the one aspect | mode of embodiment of this invention. It is sectional drawing which shows the structure of the connection part of the outer wall materials adjacent to the up-down direction in the one aspect | mode of embodiment of this invention. Regarding another aspect of the embodiment of the present invention, (a) is a perspective view showing a guiding member, (b) is a positional relationship among a vertical trunk edge, a face plate material, a mounting bracket, an outer wall material, and a guiding member in the outer wall structure. FIG. It is a perspective view which shows the positional relationship of the vertical trunk | drum edge in an outer-wall structure, an eyeplate material, a mounting bracket, and an outer wall material regarding another aspect of embodiment of this invention. FIG. 4 is a perspective view, and FIG. 5 (b) is a cross-sectional view showing a positional relationship among a vertical trunk edge, a face plate material, a mounting bracket, and an outer wall material in an outer wall structure, according to still another aspect of the embodiment of the present invention. It is general | schematic sectional drawing which shows the positional relationship of a vertical trunk | drum edge, eyeplate material, a mounting bracket, and an outer wall material in the modification of one Embodiment of this invention. (A) is a sectional view in plan view of the outer wall structure in the embodiment, and (b) is a sectional view in side view of the outer wall structure in the embodiment. It is a front view which shows the outer wall structure in the said one Embodiment. It is side surface sectional drawing which shows the outer wall structure in the said one Embodiment. (A), (b) and (c) are the front views which show the modification of the said embodiment. (A), (b) and (c) are side view sectional drawings which show the modification of the said embodiment.

  In one embodiment of the present invention, the outer wall structure of a building includes a wall foundation 2, a plurality of outer wall materials 10 installed at positions on the outdoor side with respect to the wall foundation 2, and the wall foundation 2 and the outer wall material 10. The eye plate material 40 is provided at a position between them. Furthermore, in this embodiment, the outer wall structure of the building includes a mounting bracket 50.

  Furthermore, in this embodiment, the outer wall structure of a building is provided with a guidance means. The guiding means is a position where the flow of water moving along the outer wall from the vertical joint between the outer wall materials on at least one upper end surface of the outer wall materials adjacent in the horizontal direction overlaps the outdoor side or the eye plate material 40. Means for guiding to the indoor side. In one aspect of the present embodiment, the mounting bracket 50 includes a guide piece 56 as described later, and this guide piece 56 constitutes a guide means.

  1 and 2 show an outer wall structure according to the present embodiment. The outer wall material 10 is composed of a flat plate-like plate material or the like. The material of the outer wall material 10 is not particularly limited, and an example thereof is that the outer wall material 10 is formed of a ceramic material mainly composed of cement.

  A receiving portion 31 is formed at the upper end of the outer wall material 10, and an overlapping portion 32 is formed at the lower end. The receiving portion 31 protrudes upward from a position deflected indoors at the upper end of the outer wall member 10. The overlapping portion 32 protrudes downward from a position deflected to the outdoor side at the lower end of the outer wall material 10. By forming the receiving portion 31 and the overlapping portion 32 as described above, the outer wall member 10 can be connected to the upper and lower sides as described later. Further, a concave groove 33 is formed at the lower end of the outer wall member 10 so as to open downward at a position on the indoor side of the overlapping portion 32. The side end surfaces on both sides of the outer wall material 10 are formed flat.

  As shown in FIG. 3, a downward locking piece 51 is formed at a substantially central portion of the mounting bracket 50. The downward locking piece 51 includes a protruding piece 511 that protrudes from the substantially central portion of the mounting bracket 50 toward the outdoor side, and a locking claw 512 that protrudes downward from the tip of the protruding piece 511. Two upward locking pieces 52 are formed in the mounting bracket 50 side by side along the outer wall so as to sandwich the downward locking pieces 51. Each of the two upward locking pieces 52 includes a protruding piece 521 that protrudes to the outdoor side, and a locking claw 522 that protrudes upward from the tip of the protruding piece 521. A mounting hole 53 is formed in the mounting bracket 50 above the upward locking piece 52 and the downward locking piece 51. Furthermore, support portions 54 that protrude toward the outdoor side are formed on both side portions of the mounting bracket 50.

  Furthermore, in one aspect of the present embodiment, a vertical groove (accommodating groove 55) is formed on the indoor side surface of the support portion 54. The upper end of the housing groove 55 is opened upward and the lower end is opened downward. A guide piece 56 protrudes from each of the support portions 54 toward the outdoor side. The guide piece 56 is formed by cutting and raising a part of the outdoor side surface of the support portion 54 toward the outdoor side. The protruding piece 511, the protruding piece 521, and the guide piece 56 are formed so as to be aligned in a substantially horizontal direction along the outer wall.

  The mounting bracket 50 is produced by, for example, bending a metal plate having a thickness of about 0.8 to 1.2 mm. Examples of the metal plate include zinc-aluminum-magnesium alloy-plated steel plate, stainless steel plate, and aluminum plate that have high corrosion resistance.

  As shown in FIGS. 4 and 5, the eye plate material 40 is a plate-like member that is long in the vertical direction.

  The material of the face plate material 40 is not particularly limited, and may be formed from an appropriate material such as a metal plate material, a resin, or an aluminum extrusion molded product, but is particularly preferably formed from a metal plate material.

  The eye plate material 40 is formed with a plurality of ridges 41 that are long in the vertical direction and protrude outward. There is a region (central region 42) where the ridges 41 are not formed in the central portion of the face plate material 40, and two ridges 41 (411) are provided on both sides of the central region 42 along the outer wall in the horizontal direction. , 412). A joint guide 43 that is long in the vertical direction and protrudes to the outdoor side is formed in the central portion of the central region 42, and the central region 42 is formed flat otherwise. On each of both sides of the central region 42, two ridges 411 and 412 are provided in parallel at intervals. On the outer side of the plurality of ridges 411 and 412 on each side of the horizontal direction along the outer wall of the face plate material 40, a flat region (side region 44) where the ridges 41 are not formed is formed. ing.

  The ridges 41 and joint guides 43 are composed of, for example, portions that protrude toward the outdoor side when the joint plate material 40 is bent. In addition, the protruding item | line 41 and the joint guide 43 may be formed from an appropriate packing material. Examples of the shape of the ridge 41 include a triangular cross section as in the present embodiment, but are not particularly limited. In addition, it is preferable that the number of the protrusions 41 in each of the both sides of the center area | region 42 is 2 or more. Examples of the shape of the joint guide 43 include a rectangular cross section, but are not particularly limited.

  As shown in FIG. 2, the wall base 2 is the base of the outer wall. In the present embodiment, the wall base 2 is constituted by a plurality of pillars 17 and a face material attached to the pillars 17. The face material is a member that closes a gap between adjacent columns 17. Examples of the face material include a structural face material 20 such as an appropriate plate material. In the present embodiment, as the face material, the structural face material 20 and the waterproof sheet 14 are used in combination, the structural face material 20 is installed on the outdoor side of the column 17, and the structural face material such as this plate material. 20 is provided with a waterproof sheet 14 on the outdoor side. Thereby, it is suppressed that water, such as rain water, permeates the indoor side rather than the waterproof sheet 14.

  A vertical trunk edge 11 is attached to the wall base 2. In the present embodiment, the vertical trunk edge 11 is a member that is long in the vertical direction and is used to attach the eye plate material 40 and the outer wall material 10 to the wall base 2. The vertical trunk edge 11 is overlapped on the pillar via a face material on the outdoor side of the wall base 2. The vertical trunk edge 11 is attached to the wall base 2 by fixing a fixture such as a nail or a screw through the vertical trunk edge 11 to the column 17.

  As shown in FIGS. 1 and 2, the eye plate material 40 is attached so as to overlap the surface of the vertical trunk edge 11 on the outdoor side. In the present embodiment, the eye plate material 40 is attached to the vertical trunk edge 11 by a fixture 13 such as a screw or a nail, and an attachment fitting 50. The mounting bracket 50 is disposed so as to overlap the side region 44 on the surface of the eye plate material 40 on the outdoor side. Further, the accommodation groove 55 on the side plate material 40 side of the mounting bracket 50 and the convex strip 412 on the side of the mounting plate 50 on the side plate material 40 are arranged so as to overlap each other. Can be stored. At the same time, the guide piece 56 is arranged at a position overlapping the convex strip 412 in the indoor-outdoor direction. In the present embodiment, in this state, the fixture 13 is driven from the mounting bracket 50 through the eye plate material 40 to the vertical body edge 11 so that the eye plate material 40 is fixed to the vertical body edge 11 and attached at the same time. A metal fitting 50 is attached to the vertical trunk edge 11.

  On each of both sides of the central region 42 in one eye plate member 40, a plurality of mounting brackets 50 are attached side by side. The eye plate material 40 is attached to the vertical body edge 11 at a position overlapping with the horizontal butted portion between the adjacent outer wall materials 10 among the plurality of vertical body edges 11 attached to the wall base 2. The mounting bracket 50 is attached to the vertical trunk edge 11 to which the eye plate material 40 is not attached among the plurality of vertical trunk edges 11 as necessary. When attaching the eye plate material 40, when the mounting bracket 50 is used, the fixture 13 may be driven into the side region 44 of the eye plate material 40. In this case, as will be described later, since rainwater or the like hardly enters the side region 44, intrusion of rainwater from the portion where the fixing tool is driven into the building body is suppressed.

  A plurality of outer wall materials 10 are installed on the outdoor side of the wall base 2, the eye plate material 40, and the mounting bracket 50. The outer wall portion 1 is constituted by a set of a plurality of outer wall materials 10. The plurality of outer wall members 10 are installed so as to be aligned in the horizontal direction and the vertical direction. The outer wall materials 10 adjacent to each other in the horizontal direction are arranged so that their end faces face each other. On the other hand, the outer wall materials 10 adjacent in the vertical direction are connected to each other by fitting the overlapping portion 32 at the lower end of the upper outer wall material 10 and the receiving portion 31 at the upper end of the lower outer wall material 10. Has been.

  As shown in FIG. 6, the outer wall material 10 is attached to the wall base 2 by a mounting bracket 50. That is, the upward locking piece 52 of the mounting bracket 50 is fitted into the overlapping portion 32 and the concave groove 33 at the lower end of the outer wall material 10, and the downward locking piece 51 of the mounting bracket 50 is fitted to the receiving portion 31 at the upper end of the outer wall material 10. The outer wall material 10 is fixed by fitting. In this case, the upper locking piece 52 and the downward locking piece 51 of one mounting bracket 50 are interposed between the outer wall materials 10 adjacent to each other in the vertical direction, so that the upper outer wall material 10 is formed by the single mounting bracket 50. Are simultaneously fixed to the lower end of the lower outer wall member 10. The lower end of the outer wall member 10 installed on the lowermost side of the outer wall portion 1 has an upper locking piece 52 and a mounting bracket 50 that does not have a downward locking piece 51 (see the starter bracket 12 (see FIG. 11B)). In installing the outer wall material 10, for example, the starter metal fitting 12 is first installed, and then the outer wall material 10 and the mounting metal fitting 50 are sequentially installed from the lower side of the outer wall, whereby the outer wall material 10 is installed. When the upper end of the outer wall member 1 is fixed by the mounting bracket 50, the guide piece 56 of the mounting bracket 50 is disposed on the upper end surface of the receiving portion 31 of the outer wall member 10.

  The abutting portion between the two outer wall materials 10 (referred to as the first outer wall material 101 and the second outer wall material 102 for convenience) adjacent to each other in the horizontal direction in the outer wall portion 1 is formed by the eye plate material 40 from the indoor side. Arranged in a covered position. A central region 42 in which the protruding strips 41 of the eye plate material 40 are not formed is disposed at a position overlapping the abutting portion between the first outer wall material 101 and the second outer wall material 102. Further, a joint guide 43 is interposed between the first outer wall material 101 and the second outer wall material 102 at the abutting portion. For this reason, joints (vertical joint portions) are formed at the abutting portions between the first outer wall material 101 and the second outer wall material 102. Further, since the central region 42 is arranged at a position overlapping the vertical joint portion in this way, the position closer to the first outer wall material 101 than the vertical joint portion and the second outer wall material 102 closer to the second joint wall portion than the vertical joint portion. At least two ridges 41 in the vertical direction are arranged at each position. The ridge line of the ridge 41 located closer to the first outer wall material 101 than the vertical joint portion is in contact with or close to the indoor side surface of the first outer wall material 101, and is the second outer wall material from the vertical joint portion. The ridge line of the ridge 41 located closer to 102 is in contact with or close to the indoor side surface of the second outer wall material 102.

  Further, in the vicinity of both sides of the vertical joint portion, the guide piece 56 of the mounting bracket 50 is disposed on the upper end surface of the receiving portion 31 in each of the first outer wall material and the second outer wall material. As described above, the guide piece 56 is disposed at a position overlapping the convex strip 412 in the indoor-outdoor direction.

  The sealing material is not filled in the vertical joints between the outer wall materials 10 adjacent in the horizontal direction along the outer wall. That is, the outer wall structure according to the present embodiment is configured by a non-sealing method.

  In the outer wall structure configured as described above, when the outer wall portion 1 is exposed to wind and rain, rainwater may enter from a joint formed between the outer wall materials 10 adjacent in the horizontal direction that are not sealed.

  However, since the joint is covered with the eye plate material 40 on the indoor side, the infiltration of rainwater into the indoor side is suppressed by the eye plate material 40. Further, since the horizontal movement (lateral running) of the rainwater is blocked by the ridges 41, the rainwater is prevented from moving to the outside of the eye plate 40, and the rainwater is guided to flow downward. For this reason, the intrusion of rainwater into the room is suppressed. Rainwater flowing downward is discharged to the outside from the lower end of the outer wall portion 1 (first communication port 401 described later in the present embodiment).

  In the present embodiment, at least two ridges 41 in the vertical direction are provided at each of the position closer to the first outer wall material 101 than the vertical joint and the position closer to the second outer wall material 102 than the vertical joint. Therefore, even if the rainwater that has entered from the joint moves in the horizontal direction and climbs over one ridge 41, the other ridge 41 prevents the horizontal movement. For this reason, the intrusion of rainwater into the room is remarkably suppressed.

  Furthermore, even if rainwater enters the upper end surface of the outer wall portion 1 from the joint and flows horizontally on the upper end surface along the outer wall, this water flow is inhibited by the guide piece 56 in this embodiment. The water flows along the outer wall material 10 to at least one of the indoor side and the outdoor side. If water flows to the outdoor side, the ingress of water into the indoor side of the outer wall material 10 is prevented. Even if the water flows indoors, the guide piece 56 is arranged at a position overlapping with the protrusion 412, so that the water blocked by the guide piece 56 is between the outer wall material and the eye plate material than the protrusion 412. Also flows into the indoor side at a position inside (close to the vertical joint). For this reason, the horizontal movement of the water flowing into the indoor side is blocked by the protrusion 412 and flows downward, and is discharged to the outside from the lower end of the outer wall portion 1 (first communication port 401 described later in the present embodiment). Is done.

  Thus, in this embodiment, even if water flows into the upper end surface of the outer wall member 10, this water is guided and discharged to the outside, so that the intrusion of water into the room is suppressed.

  Moreover, in this embodiment, invasion of rainwater from the joint to the interior is suppressed even though the joint is not sealed. Further, since the joint is not sealed, it is possible to reduce the sealing material, and therefore, it is possible to reduce the construction cost and the labor of construction. Furthermore, it is not necessary to consider the aging deterioration of the sealing material, and therefore, a great amount of labor required to remove the aging sealing material and fill with a new sealing material is reduced.

  In order for the ridge 41 to sufficiently prevent the movement of rainwater, it is preferable that the protruding dimension of the ridge 41 to the outdoor side is 2 mm or more. The upper limit of the protruding dimension of the ridge 41 is not particularly limited, but is 10 mm or less for improving the workability of the outer wall material 10 and the appearance of the outer wall after the construction, particularly for the good fit of the opening member such as the window frame. It is preferable. Moreover, in order to suppress that rainwater moves between the protruding item | line 41 and the outer wall material 10, the clearance gap dimension between the ridgeline of the protruding item | line 41 and the indoor side surface of the outer wall material 10 is 0-1. A range of 5 mm is preferable, and a range of 0 to 1.0 mm is more preferable.

  The projecting dimension of the joint guide 43 toward the outdoor side is larger than the projecting dimension of the ridge 41 and smaller than the thickness dimension of the outer wall material 10. In addition, the minimum value of the joint guide 43 is not particularly limited, and is set to a width dimension that allows lateral positioning when the outer wall material 10 is constructed, and suppression of displacement due to expansion and contraction of the outer wall material 10 after construction. Just do. For example, the width dimension of the joint guide 43 is formed to be equal to or greater than the material thickness of the joint guide 43 (approximately twice the material thickness in the case of a material that is folded and formed, such as a steel plate). In addition, the width of the gap formed between the joint guide 43 and the first outer wall material 101 and between the joint guide 43 and the second outer wall material 102 sufficiently suppresses intrusion of rainwater into the room. For this purpose, it is preferably 10 mm or less, more preferably 2 mm or less.

  In order to ensure a sufficient space for rainwater that has entered from the joints to flow downward, the distance between the joint guide 43 and the ridges 411 disposed immediately next to the joint guide 43 may be 6 mm or more. preferable. Moreover, it is preferable that the space | interval (overhang) of the end surface of the outer wall material 10 in a joint and the protruding item | line 411 arrange | positioned just outside this end surface is 2 mm or more. Moreover, in each of the both sides of the center area | region 42, it is preferable that the space | interval between the adjacent protruding item | lines 411 and 412 is the range of 3-10 mm.

  In the present embodiment, since the joint guide 43 is formed on the joint plate material 40, the outer wall member 10 is installed according to the joint guide 43, so that the positioning of the installation position of the outer wall member 10 becomes easy. Further, it becomes easy to set the joint width to a constant width. Furthermore, the positional deviation of the outer wall material 10 after installation is suppressed. Further, although a gap (joint) having a certain width is formed between the outer wall materials 10 adjacent in the horizontal direction, the entry of water from the joint is suppressed by the joint guide 43 interposed in the gap. The

  In the present embodiment, the guide piece 56 is disposed at a position overlapping the convex strip 412, but the position of the guide piece 56 is not limited to this position. When the flow of water is guided to the indoor side or the outdoor side by the guide piece 56, if it is guided to the indoor side or the outdoor side at a position overlapping the eye plate material 40, it is a case of being guided to the indoor side. However, the infiltration of water into the indoor space is suppressed by the joint plate 40, and the guide piece 56 is disposed at an appropriate position as long as it is.

  However, in this embodiment, since the guide piece 56 guides the flow of water to the indoor side or the outdoor side at a position closer to the joint side (longitudinal joint side) than the ridge 412, as described above, the ridge 412 causes the horizontal direction. By preventing the movement of water, the intrusion of water into the room is further suppressed. Thus, it is preferable that a guiding means for guiding water to the indoor side or the outdoor side is employed at a position between the vertical joint and the protrusion 412.

  Further, the configuration of the guiding means is not limited to the guiding piece 56 provided in the mounting bracket 50 as described above. That is, the water flowing in the horizontal direction along the outer wall from the vertical joint between the outer wall materials on the upper end surface of at least one of the outer wall materials adjacent to each other in the horizontal direction is indoors at a position overlapping the outdoor side or the eye plate material. Any guiding means having an appropriate structure can be adopted as long as it is a means for guiding to the right. Examples of guiding means other than the guiding piece 56 provided in the mounting bracket 50 are shown in FIGS. 7, 8, and 9, respectively.

  In the aspect shown in FIG. 7, the outer wall structure includes a guiding member 60 including a guiding piece 61. The guide member 60 is a separate member from the mounting bracket 50. It is preferable that the thickness (vertical dimension) of the guide piece 61 is in the range of 0.2 to 1.5. The guide member 60 further includes a support piece 62 that protrudes downward from each of the indoor side edge and the outdoor side edge of the guide piece 61. The width between the two support pieces 62, 62 is the same as or slightly smaller than the dimension of the receiving portion 31 of the outer wall member 10 in the indoor-outdoor direction.

  The guiding member 60 is attached to the receiving portion 31 in each of the first outer wall material and the second outer wall material so as to be positioned between the vertical joint portion and the protrusion 412 in the vicinity of both sides of the vertical joint portion. The two support pieces 62 of the guiding member 60 sandwich the receiving portion 31 of the outer wall material 10, so that the guiding member 60 is stably fixed to the receiving portion 31.

  In the embodiment shown in FIG. 7, the guide piece 56 and the accommodation groove 56 are not formed in the support portion 54 of the mounting bracket 50. Further, the mounting bracket 50 is disposed on the surface of the eye plate material 40 on the outdoor side so as to overlap the side region 44 without overlapping the protrusions 411 and 412.

  Other than that, there is no difference in this embodiment from the case where the guiding means is constituted by the guiding piece 56 provided in the mounting bracket 50.

  When the guiding means is constituted by the guiding piece 61 of the guiding member 60 as described above, rainwater infiltrates from the joint onto the upper end surface of the outer wall portion 1 as in the case where the guiding means is constituted by the guiding piece 56 in the mounting bracket 50. Even if it flows on the upper end surface along the outer wall in the horizontal direction, the water flow is hindered by the guide piece 61, so that the water flows along the outer wall material 10 to at least one of the indoor side and the outdoor side. If water flows to the outdoor side, the ingress of water into the indoor side of the outer wall material 10 is prevented. Even when water flows indoors, the guide piece 61 is attached so as to be positioned between the vertical joint and the protrusion 412, so that the water blocked by the guide piece 61 is the outer wall material 10 and the eyeplate material 40. Between the ridges 412 and flows into the outdoor side at a position on the inner side (closer to the vertical joint) than the ridges 412. For this reason, the horizontal movement of the water flowing into the outdoor side is blocked by the ridges 412 and flows downward, and is discharged from the lower end of the outer wall portion 1 (first communication port 401 described later in the present embodiment) to the outside. Is done.

  In this aspect, the guide piece 61 is attached so as to be positioned between the vertical joint and the protrusion 412, but the position of the guide piece 61 is not limited to this position. If the flow of water is guided to the indoor side by the guide piece 61 and is guided to the indoor side at a position overlapping with the joint plate material 40, the entry of water into the indoor is suppressed by the joint plate 40. As long as this is the case, the guide piece 61 is disposed at an appropriate position. However, in this aspect, since the guide piece 61 guides the flow of water to the indoor side at a position closer to the joint side (vertical joint portion side) than the ridge 412, the water in the horizontal direction is moved by the ridge 412 as described above. This prevents water from entering the room further. Thus, it is preferable that a guiding means for guiding water to the indoor side at a position between the vertical joint and the protrusion 412 is employed.

  In the aspect shown in FIG. 8, the guiding means is configured by a groove (guide groove 63) formed in the upper end portion of the outer wall material 10. The guide groove 63 is a groove opened in the upward direction, the indoor side direction, and the outdoor side direction. The guide groove 63 is formed in the receiving portion 31 of each of the first outer wall material and the second outer wall material in the vicinity of both sides of the joint (vertical joint portion). In this aspect, the guide groove 63 is formed at a position closer to the joint (vertical joint portion) side than the ridge 412.

  Further, in the aspect shown in FIG. 8, the guide piece 56 and the accommodation groove 55 are not formed in the support portion 54 of the mounting bracket 50. Further, the mounting bracket 50 is arranged on the surface of the eye plate material 40 on the outdoor side so as not to overlap with the ridges 411 and 412 but to overlap with the side region 44 or outside thereof.

  Other than that, there is no difference in this embodiment from the case where the guiding means is constituted by the guiding piece 56 provided in the mounting bracket 50.

  When the guiding means is constituted by the guiding groove 63 in this way, even if rainwater enters the upper end surface of the outer wall portion 1 from the joint and flows horizontally on the upper end surface along the outer wall, the water is guided to the guiding groove 63. And further flows along the outer wall material 10 to at least one of the indoor side and the outdoor side. If water flows to the outdoor side, the ingress of water into the indoor side of the outer wall material 10 is prevented. Even if the water flows indoors, the guide piece 61 is formed at a position closer to the joint side than the protrusion 412, so that the water blocked by the guide groove 63 is between the outer wall material 10 and the eye plate material 40. Then, it flows into the outdoor side at a position inside the ridge 412 (closer to the vertical joint). For this reason, the horizontal movement of the water flowing into the outdoor side is blocked by the ridges 412 and flows downward, and is discharged from the lower end of the outer wall portion 1 (first communication port 401 described later in the present embodiment) to the outside. Is done.

  As described above, the size of the guide groove 63 is such that the flow of water on the upper surface of the outer wall material 10 is sufficiently blocked by the guide groove 63, and this water is sufficiently guided from the guide groove 63 to at least one of the indoor side and the outdoor side. Is set as appropriate.

  In this aspect, the guide groove 63 is formed at a position closer to the joint than the protrusion 412, but the position of the guide groove 63 is not limited to this position. If the flow of water is guided to the indoor side by the guide groove 63, if the water is guided to the indoor side at a position overlapping the joint plate material 40, the infiltration of water into the indoors is suppressed by the joint plate 40. As long as this is the case, the guide groove 63 is formed at an appropriate position. However, in this embodiment, the guide groove 63 guides the flow of water to the indoor side at a position closer to the joint side (longitudinal joint side) than the ridge 412. Therefore, as described above, the ridge 412 moves the water in the horizontal direction. This prevents water from entering the room further. Thus, it is preferable that a guiding means for guiding water to the indoor side at a position between the vertical joint and the protrusion 412 is employed.

  In the aspect shown in FIG. 9, the guiding means is configured by an inclined surface (guidance surface 64) that is formed on the upper end surface of the outer wall member 10 and is inclined downward toward the outdoor side. In this aspect, the guide surface 64 is formed over the entire upper surface of the receiving portion 31 at the upper end of the outer wall material 10.

  In the aspect shown in FIG. 9, the guide piece 56 and the accommodation groove 56 are not formed in the support portion 54 of the mounting bracket 50. Further, the mounting bracket 50 is arranged on the surface of the eye plate material 40 on the outdoor side so as not to overlap with the ridges 411 and 412 but to overlap with the side region 44 or outside thereof.

  Other than that, there is no difference in this embodiment from the case where the guiding means is constituted by the guiding piece 56 provided in the mounting bracket 50.

  When the guiding means is constituted by the guiding surface 64 in this way, even if rainwater enters the upper end surface of the outer wall portion 1 from the joint and flows on the upper end surface along the outer wall in the horizontal direction, the water flow is induced. It is guided to the outdoor side by the inclination of the surface 64.

  Moreover, the flow of water on the upper end surface of the outer wall portion 1 is blocked by the mounting bracket. As described above, the mounting bracket is attached to the eye plate material. For this reason, even if the water which flows on the upper end surface of the outer wall part 1 goes to the indoor side against the inclination of the guide surface 64, this water is guided to the indoor side at a position where it overlaps with the eye plate material 40. For this reason, the infiltration of water into the indoor space is suppressed by the joint plate 40.

  In order to effectively guide the water flowing on the upper end surface of the outer wall material to the outdoor side by the guide surface 64, the inclination angle θ toward the outdoor side with respect to the horizontal direction of the guide surface 64 is preferably 5 ° or more. .

  In this aspect, the guide surface 64 is formed over the entire upper end of the outer wall member 10, but the guide surface 64 may be formed only on a part of the upper end of the outer wall member 10. For example, the guide surface 64 may be formed only in a range from the vertical joint portion to the arrangement position of the mounting bracket 50 at the upper end of the outer wall member 10.

  Further, the guide surface 64 may be formed only in a range from the vertical joint portion to the arrangement position of the protrusion 412 at the upper end of the outer wall material 10. In this case, since the upper end of the outer wall member 10 is not inclined at the position where the mounting bracket 50 is disposed, the strength of the receiving portion 31 is maintained sufficiently high at a position where a load from the mounting bracket 50 is applied, and the receiving portion 31 is not chipped. Is suppressed, and it is not necessary to change the shape of the mounting bracket 50 in accordance with the inclination of the upper end of the outer wall member 10.

  The configuration of the guiding means is not limited to the above aspect. Two or more of the plurality of guiding means disclosed above may be combined.

  Further, the joint plate material 40 may not include the joint guide 43. FIG. 10 shows a schematic configuration of a joint plate member 40 that does not include the joint guide 43 and an outer wall structure that includes the joint plate member 40. This outer wall structure has the same configuration as that of the above embodiment except that the joint plate material 40 does not include the joint guide 43. Even when such a joint plate material 40 is used, intrusion of rainwater from the joint into the room is sufficiently suppressed except that the function of the joint guide 43 is not exhibited. When the joint guide 43 is not formed, preferred dimensions of the joint plate material are the same as those when the joint guide 43 is formed. Furthermore, in the case where the joint guide 43 is not formed, the joint formed by the gap between the first outer wall material 101 and the second outer wall material 102 in order to sufficiently suppress the intrusion of rainwater into the room. The width is preferably 12 mm or less.

  In the present embodiment, a ventilation space 3 communicating with the outdoors is formed between the wall base 2 and the outer wall portion 1, so that intrusion of rainwater into the room is further suppressed. Hereinafter, this point will be described in detail.

  11 to 13 show the ventilation space 3 in the outer wall structure according to the present embodiment. In addition, as shown to Fig.11 (a), the inner wall part 19 comprised with a suitable inner wall material is installed in the indoor side rather than the pillar 17. As shown in FIG. A heat insulating material 18 is disposed in a space between the face material 2 and the inner wall portion 19. A moisture-proof sheet 14a may be provided on the outdoor side of the inner wall portion 19 as illustrated. By providing the moisture-proof sheet 14a, intrusion of moisture into the room is suppressed.

  In the present embodiment, the ventilation space 3 is a space formed between the outer wall portion 1 and the wall base 2. The thickness of the ventilation space 3 (indoor-outdoor direction dimensions) is ensured by the thickness of the vertical trunk edge 11 and the protruding width of the mounting bracket 50. That is, the ventilation space 3 is formed by the vertical trunk edge 11 and the mounting bracket 50 serving as spacers.

  In the present embodiment, the ventilation wall 3 is easily formed by attaching the outer wall material 10 to the wall base 2 by the mounting bracket 50.

  The thickness (indoor-outdoor direction dimension) of the ventilation space 3 is set to 20 to 23 mm, for example. By ensuring that the thickness of the ventilation space 3 is within this range, ventilation is ensured. Specifically, if the thickness of the vertical trunk edge 11 is 18 mm and the protruding width (working width) of the mounting bracket 50 is 5 mm, the ventilation space 3 having a thickness of 23 mm is formed.

  A base portion (base) 8 is provided at the lower portion of the outer wall structure. On the upper side of the base portion 8, a long base pillar (joist) 16 serving as a foundation for attaching the pillar 17 and the like is provided in the lateral direction. In the illustrated embodiment, a column 17 is disposed vertically above the base column 16 in a vertical direction perpendicular to the base column 16, and the face material is arranged on these outdoor side surfaces so as to cover the base column 16 and the column 17. It is installed. A base drainer 9 that is long in the horizontal direction along the outer wall is provided on the outdoor surface of the face material on the upper side of the base portion 8. The base drainer 9 includes a fixed piece 9a that is placed on the outdoor side surface of the wall base 2, a drainer piece 9b that protrudes while slightly descending from the lower end of the fixed piece 9a toward the outdoor side, and a drainer piece 9b. And a draining tip piece 9c protruding downward from the outdoor side end portion. The base drainer 9 is installed by fixing the fixing piece 9a to the wall base 2 with a fixing tool such as a screw. The draining piece 9b is disposed below the lower end of the outer wall portion 1 so as to face the ventilation space 3 in the vertical direction. A horizontally long opening along the outer wall is formed between the lower end of the outer wall portion 1 and the outdoor end portion of the draining piece 9b, and this opening is a communication port that connects the ventilation space 3 and the outdoors. 4 (first communication port 401).

  Since such a foundation drainer 9 is provided, rainwater that flows down the ventilation space 3, for example, rainwater that is blocked by the ridges 41 of the plate 40 and guided downward, is discharged from the first communication port 401. At that time, rainwater falls on the draining piece 9 b of the base draining 9. Further, the rainwater passes through the surface of the base drainer 9 and is discharged to the outside. At this time, the water falls to a predetermined position. Moreover, since the lower part of the ventilation space 3 is obstruct | occluded by the base drainer 9, the wind and rain which winds up from the bottom become difficult to be blown into the ventilation space 3, and the penetration | invasion of the wind force into the ventilation space 3 is suppressed for this reason.

  Furthermore, in the upper part of the outer wall structure, a gap is formed between the upper end of the outer wall part 1 and the eaves ceiling part (eave ceiling) 7, and this gap connects the ventilation space 3 and the outdoor 4 ( It becomes the 2nd communication port 402). Further, a ventilation parting edge 15 is provided on the outdoor side of the second communication port 402. The ventilation parting edge 15 is arranged at a predetermined distance from the outer wall portion 1 to the outdoor side, thereby shielding the second communication port 402. The lower surface of the ventilation parting edge 15 is open, so that the ventilation space 3 communicates with the outside through the second communication port 402. Such a ventilation parting edge 15 makes the second communication port 402 inconspicuous in appearance, and the ventilation parting edge 15 suppresses intrusion of wind and rain from the second communication port 402 into the ventilation space 3.

  Since the ventilation space 3 communicates with the outside through the communication port 4 in this way, outside air easily enters the ventilation space 3 and passes through as shown by arrows in FIG. That is, for example, outside air enters the ventilation space 3 from the first communication port 401, and the entered outside air rises in the ventilation space 3 and is further discharged to the outside through the second communication port 402. At this time, if the ventilation parting edge 15 is provided on the lower side of the eaves ceiling part 7, the flow direction of the outside air can be moved away from the eaves ceiling part 7, and the outside air can flow smoothly. Moreover, even if the outside air contains moisture, it is difficult for the outside air to directly hit the eaves ceiling 7.

  When the communication port 4 that communicates between the outside (outdoor) of the building and the ventilation space 3 is formed in this way, the pressure difference between the ventilation space 3 and the outside becomes small. Infiltration of wind and rain into the shore is suppressed. Thereby, an outer wall structure with higher waterproofness is realized. The communication port 4 is formed, for example, at a location where the wall base 2 is not partially covered with the outer wall material 10.

  In the case where the communication port 4 is not formed, for example, when the pressure on the outdoor side of the outer wall portion 1 is increased by blowing air on the outer wall portion 1, the outside air enters the indoor side from the joint between the adjacent outer wall materials 10. Inflow of rainwater and so on becomes easier. However, in the present embodiment, since the communication port 4 is formed, a pressure difference between the ventilation space 3 and the outside becomes small, so that it is difficult for outside air, rainwater, and the like to flow from the outside to the inside. Even if outside air, rainwater, or the like flows from the communication port 4, the amount thereof is small, and in this embodiment, for example, it is quickly discharged to the outside from the first communication port 401. Moreover, if some moisture is attached to the wall base 2, the penetration of moisture into the room is sufficiently suppressed by the waterproof sheet 14.

  Thus, in this embodiment, even if wind is blown against the outer wall 1, intrusion of rainwater from the joint is sufficiently suppressed.

  In order to sufficiently suppress the inflow of rainwater or the like into the indoor space, the pressure difference between the ventilation space 3 and the outside is 50 Pa or less under the condition that the wind speed blown to the outer wall portion 1 is 20 m / sec or less. It is preferable to become. The wind blown to the outer wall 1 in this case may be at least one of a front wind (wind perpendicular to the wall surface) and a slope wind (wind blowing down from the upper 45 ° toward the wall surface). In both cases, the pressure difference is preferably 50 Pa or less. The water spraying pressure test for the building for performing the performance evaluation of such an outer wall structure can be performed according to JIS A1414 “Performance test of building components (panel) and its structural part, 6.5 watertight test”.

In order to sufficiently suppress the inflow of rainwater or the like indoors, the ratio of the opening area of the communication port 4 to the area of the wall surface of the wall base 2 in the ventilation space 3 is 65 cm ² / m ² or more. Is preferred. That is, it is preferable that the opening area of the communication port 4 per 1 m ^{2 of} the wall surface is 65 cm ² or more. The wall surface here is a surface constituting the wall of the building, and is composed of the surface on the outdoor side of the wall foundation 2. The wall surface is generally above the base portion 8 and more than the eaves portion 7. This is the lower planar part. The wall surface does not include the area of the opening 30 such as a window or a ventilation opening. When there are a plurality of communication ports 4 communicating with the ventilation space 3, the ratio of the total amount of the opening areas of the plurality of communication ports 4 is preferably 65 cm ² / m ² or more. That is, in this embodiment, it is preferable that the ratio of the total amount of the opening areas of the first communication port 401 and the second communication port 402 communicating with the ventilation space 3 is 65 cm ² / m ² or more. The communication ports 4 may be provided concentrated on a part of the wall surface or distributed on the wall surface. Therefore, when the area of the wall surface is Sm ² , the total area of the communication ports 4 may be 65 × Scm ² or more. If the ratio of the opening area of the communication port 4 is smaller than this, the pressure difference may not be reduced. The upper limit of the ratio of the opening area of the communication port 4 is not particularly limited. If the inflow of rainwater or the like from the communication port 4 is sufficiently suppressed due to sufficient water closing, the ratio of the opening area of the communication port 4 is better. It has been confirmed by experiments that the differential pressure decreases as the ratio of the opening area of the communication port 4 increases in the range of the opening area ratio of the communication port 4 up to 110 cm ² / m ² .

  When the first communication port 401 communicating with the lower end of the ventilation space 3 is formed as in the present embodiment, even if rainwater or the like enters the ventilation space 3, the rainwater or the like enters the first communication port 401. It becomes easy to be discharged. Moreover, when such a 1st communicating port 401 is formed, the ratio that a wind and rain hits the wall base 2 directly will reduce. Therefore, when a plurality of communication ports 4 are formed, the opening area of the first communication port 401 communicating with the lower end of the ventilation space 3 is preferably larger than the opening areas of the other communication ports 4.

In particular, the opening area of the first communication port 401 is preferably 150 cm ² or more per 1 m of the frontage (the lateral length of the wall surface). In this case, the movement of air between the outdoors and the ventilation space 3 is reliably performed. For that purpose, the length (gap width) in the vertical direction of the first communication port 401 is preferably about 10 to 30 mm, for example, 18 mm. It is also preferable that the length of the first communication port 401 in the vertical direction is larger than the thickness of the vertical trunk edge 11.

  The opening area of the first communication port 401 is preferably larger than 50% of the minimum sectional area of the ventilation space 3 in the horizontal direction. The reason that the minimum cross-sectional area in the horizontal direction of the ventilation space 3 is used as a reference is that this value greatly determines the ease of air flow in the ventilation space 3. As described above, if the opening area of the first communication port 401 is larger than 50% of the minimum sectional area of the ventilation space 3 in the horizontal direction, the first communication port 401 prevents the air from flowing through the ventilation space 3. For this reason, the pressure difference between the outdoors and the ventilation space 3 is further reduced. The minimum cross-sectional area in the horizontal direction of the ventilation space 3 is the area of the region between the outer wall material 10 and the wall base 2 excluding the vertical trunk edge 11 and the mounting bracket 50. However, since the mounting bracket 50 has a sufficiently small cross-sectional area as compared with others, it may be ignored in calculation. Therefore, the minimum cross-sectional area in the horizontal direction of the ventilation space 3 is obtained by multiplying the width of the ventilation space 3 (the distance between the outer wall material 10 and the wall base 2) by the lateral length of the wall surface and arranging it on the wall surface. It may be regarded as a value obtained by subtracting the cross-sectional area of the vertical trunk edge 11 formed.

The total opening area of the second communication port 402 is preferably 6.0 cm ² or less with respect to the wall surface 1 m ² . If the opening area of the second communication port 402 is larger than this, the ventilation parting edge 15 may be too large.

  As shown in FIG. 11A, a corner portion 5 is formed by one wall surface (for example, the lower wall surface in the drawing) and another wall surface (for example, the right or left wall surface in the drawing) on the outer wall of the building. However, the outer wall structure is provided with a ventilation dividing portion 6 that divides the ventilation space 3 provided on one wall surface and the ventilation space 3 provided on the other wall surface in the corner portion 5. Is preferred. In this embodiment, the ventilating part 6 is formed by arranging the airtight packing 6a formed in a long length in the longitudinal direction. Thus, by dividing the ventilation space 3 for each wall surface by the ventilation dividing portion 6, it is possible to prevent air from flowing from the ventilation space 3 on one wall surface to the ventilation space 3 on the other wall surface. And the pressure difference between the outside and the outside can be reduced.

In order to reduce the pressure difference between the ventilation space 3 and the outside, it is ideal that no gap is formed in the wall base 2. However, in actual construction of the outer wall, a slight gap may be formed in the joint between the face material and the opening 30, such as a mounting portion of a facility such as a sash (window frame) or a ventilation fan. There is. Therefore, in order to reduce the pressure difference between the ventilation space 3 and the outside, it is preferable to reduce the gap between the wall base 2 as much as possible so that the total area with respect to the wall surface is 9 cm ² / m ² or less. If the total area of the gap with respect to the wall surface is larger than 9 cm ² / m ² , the air may move from the ventilation space 3 to the indoor side and the pressure difference between the ventilation space 3 and the outside may not be reduced. The total area of the gap is theoretically 0 cm ² / m ² if the entire surface of the wall can be covered with a face material such as plywood without providing the opening 30 or the like, but 3 cm ² in the field construction. It is realistic to be / m ² or less.

  When an opening that penetrates indoors and outdoors, such as the opening 30, is provided, it is preferable to attach an airtight tape around the opening 30 in the wall base 2. Thereby, it becomes possible to ensure airtightness. A gap may also be formed at the abutting portion between the structural face materials 20 such as the plate material constituting the face material, and the waterproof sheet 14 is pasted over the abutting portion between the structural face materials 20 such as the plate material. If worn, the airtightness can be improved.

The wall base 2 may be provided with an opening after the construction of the outer wall by an air conditioner or the like. Therefore, it is preferable that the total opening area of the gaps with respect to the wall surface during construction of the outer wall is 5 cm ² / m ² or less. By making the opening area of the gap within this range, it becomes possible to ensure airtightness.

  In FIG. 14, the form of the outer wall structure with a high wall surface is shown. Such a form is used for a two-story or three-story or higher building. When the height of the wall surface increases, the area of the wall surface inevitably increases, and accordingly the opening area of the communication port 4 needs to be increased accordingly.

  In FIG. 14A, the communication port 4 having a large area is formed on the upper side of the base portion 8, and the communication port 4 having a small area is formed on the lower side of the eaves ceiling portion 7. In such a design, when the opening area is set to the range shown above, the opening by the communication port 4 in the base portion 8 may be too large. For example, in the case of a one-story building, the opening width is 18 mm. If the communication port 4 to be designed is a two-story building, the opening width is 36 mm, and wind and rain may enter or the appearance may deteriorate.

  Therefore, in FIG. 14B, a communication port 4 having a large area is formed on the upper side of the base portion 8 and in the middle of the floor height (such as a boundary portion between the upper floor portion and the lower floor portion), and the eave sky portion 7 A communication port 4 having a small area is formed on the lower side. At this time, the distance between the communication ports 4 and 4 is preferably within 3 m. In this form, since the opening by the communicating port 4 is disperse | distributed to a predetermined location, each opening area can be made small.

  14C, the communication port 4 having a large area is formed on the upper side of the base portion 8, the communication port 4 having a small area is formed on the lower side of the eaves top portion 7, and the outer walls adjacent to each other in the vertical direction. The communication port 4 is formed as a gap extending in the lateral direction between the materials 10 and 10 (so-called horizontal joint portion). In this case, the openings of the communication ports 4 are further dispersed, and the openings can be made less noticeable.

  FIG. 15 shows an example of a structure in which the communication port 4 is formed in the middle of the floor. 15 (a) and 15 (b) correspond to the form of FIG. 14 (b), and the outer wall 1 is divided by the floor high drainer 22; 4 is provided. By using the floor drainer 22, draining can be performed in the middle of the floor, and the opening can be made inconspicuous. In the illustrated floor high drainer 22, the floor high drainer tip piece 22 a that hangs down covers the front surface of the communication port 4 provided below the floor high drainer 22. It is possible to prevent wind and rain from blowing directly into the communication port 4 on the side.

  In FIG. 15A, the floor drainer 22 is attached to the surface of the vertical trunk edge 11 on the outdoor side. Moreover, in FIG.15 (b), the floor high drainer 22 is attached to the surface of the wall base 2, and the outer wall part 1 and the vertical trunk edge 11 are parted in the up-down direction. In this form, it is possible to form the vertical trunk edge 11 and the outer wall portion 1 for each floor. 15 (a) and 15 (b), when the roof portion 21 is formed at the boundary between the lower floor portion and the upper floor portion, if the communication port 4 is formed adjacent to the roof, the opening becomes less conspicuous. preferable.

  FIG. 15C corresponds to the configuration of FIG. 14C, and the communication port 4 is formed by the gap between the outer wall materials 10 and 10. In the case where the gap between the outer wall materials 10 and 10 is the communication port 4, the openings can be dispersed and become less conspicuous. The width L of the gap between the outer wall materials 10 and 10 can be designed as appropriate, and can be set to, for example, about 1 to 5 mm, specifically 3 mm. In order for the total amount of the opening area of the communication port 4 to satisfy the above range, the width L of the gap between the outer wall materials 10 and 10 is preferably 1.5 mm or more.

  Since the vertical trunk edge 11 is disposed in the ventilation space 3, there is a possibility that the movement of air may be hindered. Therefore, in order to make the air flow smooth, the communication port 4 is formed in a direction perpendicular to the longitudinal direction of the vertical body edge 11, that is, the vertical body edge 11 and the communication port 4 are formed substantially orthogonally. It is preferable. For example, as described above, the communication port 4 can be provided at the lower end portion of the wall surface (upper side of the base portion 8) and the upper end portion of the wall surface (below the eaves ceiling portion 7), and further in the gap between the upper and lower outer wall materials 10 The communication port 4 can also be provided. Thereby, the linear communication port 4 can be formed in the horizontal direction which is a direction perpendicular | vertical to the vertical trunk edge 11. FIG.

  In the above embodiment, the first communication port 401 opened at the lower end portion of the outer wall portion 1 and the second communication port 402 opened at the upper end portion of the outer wall portion 1 are mainly formed. However, one of the first communication port 401 and the second communication port 402 may be formed. Alternatively, the first communication port 401 and the second communication port 402 are not formed, and the communication port 4 is formed in the gap between the outer wall materials 10, thereby ensuring the necessary opening area of the communication port 4. May be.

Verification that the pressure difference between the ventilation space 3 and the external space is particularly low when the ratio of the opening area of the communication port to the area of the wall surface of the wall base in the ventilation space is 65 cm ² / m ² or more. The result is shown.

Using a test body (house) having an outer wall structure as shown in FIGS. 11 to 13, the differential pressure (pressure difference with the external space) generated in the ventilation space 3 was measured. As the test body, a vertical trunk edge 11 having a thickness of 18 mm and a mounting bracket 50 having a protruding width of 5 mm were used, and the thickness of the ventilation space 3 was set to 23 mm. A rectangular outer wall material 10 was horizontally stretched to form the outer wall portion 1. Moreover, the wall surface was divided for every surface by the ventilation | gas_flow part 6 (airtight packing 6a). There was no division within the wall. Further, a structural face material made of plywood was used for the wall base 2, and a ventilation parting edge 15 was disposed on the lower side of the eaves ceiling part 7. As for the opening area of the wall base 2, the actual gap was 9 cm ² / m ² , and the effective opening area where the resistance was calculated was 5 cm ² / m ² . The dimension of the wall surface was 2.4 m long × 5.4 m wide (area: 13.0 m ² ). The opening 30 was not provided. The position of the communication port 4 is the upper side of the base portion 8, the lower side of the eaves ceiling portion 7 (parting portion), and the gap (base material portion) between the outer wall materials 10, 10. The shape of the communication port 4 is horizontal A straight line extending in the direction was used. Other specifications are as shown in Table 1.

Front surface of the test specimen at a wind speed of 5 m / sec (evaluation of an assumed wind speed of 20 m / sec is measured at a wind speed of 5 m / sec due to equipment constraints and converted by the following conversion formula). Applying wind (wind perpendicular to the wall surface, angle 0 ° to the horizontal direction) or slope wind (wind blowing obliquely to the wall surface, angle 45 ° to the horizontal direction), the ventilation space 3 and the outside The pressure difference was measured at many points on the wall surface, and the maximum value was noted. In order to evaluate the pressure difference at an assumed wind speed of 20 m / sec, the pressure difference is obtained using the conversion formula P = V ² × 1/2 × ρ (P: wind pressure, V: wind speed, ρ: air density). It was. The pressure was measured by averaging 300 points for 30 seconds per measurement point using a Baratron (Nihon KS Corp., 220DD-00001A2B). In order to reduce the generated differential pressure to 50 Pa or less at an assumed wind speed of 20 m / sec, the differential pressure coefficient ΔCp needs to be about 0.21 or less. The results are shown in Table 1.

  As shown in Table 1, it was confirmed that the generated differential pressure ΔP was smaller when the opening area of the communication port 4 was larger.

DESCRIPTION OF SYMBOLS 1 Outer wall part 101 1st outer wall material 102 2nd outer wall material 2 Wall base 3 Ventilation space 4 Communication port 40 Eye plate material 41 Convex strip 50 Mounting bracket

Claims (5)

A wall base, a first outer wall member and a second outer wall member installed at positions on the outdoor side with respect to the wall base, the wall base, the first outer wall member, and the second outer wall member, Comprising eye plate material installed at a position between, and guiding means,
The first outer wall material and the second outer wall material are arranged close to each other so as to be adjacent to each other in the horizontal direction, and a vertical joint is formed between the two.
The eye plate material is disposed at a position covering the vertical joint portion from the indoor side,
The guide means moves the water flowing along the outer wall from the vertical joint on the upper end surface of at least one of the first outer wall member and the second outer wall member, on the outdoor side or the eye plate member. An outer wall structure that leads to the indoor side at overlapping positions. Upward and downward ridges are formed at each of the position of the joint plate material closer to the first outer wall material than the vertical joint portion and the position closer to the second outer wall member than the vertical joint portion,
The guiding means moves the water flowing along the outer wall from the vertical joint portion on the upper end surface of at least one of the first outer wall member and the second outer wall member, on the outdoor side or the vertical joint portion. The outer wall structure according to claim 1, wherein the outer wall structure is guided to an indoor side at a position between the ridge and the ridge. Comprising an outer wall portion composed of the plurality of outer wall materials, the outer wall portion being installed at a position on the outdoor side with respect to the wall base,
The outer wall structure according to claim 1, wherein a ventilation space communicating with the outdoors is formed between the wall base and the outer wall portion. It includes a communication port for connecting the ventilation space and outdoor, to the area of the wall surface of wall base of said vent space, the ratio of the opening area of the communication port, according to claim 3 is 65cm 2 ^/ m ² or more Exterior wall structure. The outer wall structure according to any one of claims 1 to 4, further comprising a mounting bracket for fixing the outer wall material to the wall base.

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