JP2010209615A - Water cut-off structure of horizontal joint and building with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the water like rainwater from entering into an indoor side even when a water cut-off seal arranged in a horizontal joint has an end. <P>SOLUTION: The horizontal joint 26 formed between upper and lower exterior wall panels 21, 22 has a water cut-off structure of a double seal including a secondary water cut-off seal 42 and a primary water cut-off seal arranged on the outdoor side thereof. Since the horizontal joint 26 is in a discontinued state according to a structure of a house itself, the secondary water cut-off seal 42 has the end. A curved part 43 is formed at the end of the secondary water cut-off seal 42 in a manner that the end is curved to the outdoor side and a front end thereof projects from the exterior surface. The water passing through the primary water cut-off seal and flowing in the clearance between the primary water cut-off seal and the secondary cut-off seal 42 in a lateral direction is stopped by the curved part 43 and led to the outdoor side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a horizontal joint water stop structure formed between upper and lower outer wall panels and a building including the same.

  In a building having an outer wall formed by combining a plurality of outer wall panels, vertical joints and horizontal joints are formed between the outer wall panels. In order to prevent water such as rainwater from entering into the building from the vertical joints and the horizontal joints, water seals are provided on these joints.

  However, there is a possibility that leakage may occur despite the provision of the water-stop seal due to deterioration of the water-stop seal exposed to wind and rain over time. For this reason, as a countermeasure, there has been proposed a water stop structure in which double water stop seals are arranged before and after the joint. That is, the structure is such that the water-stopping seal exposed to the outside is a primary water-stopping seal, and a secondary water-stopping seal is provided behind it as a backup seal. As a result, even if water passes through the primary water-stop seal due to scratches caused by deterioration over time, the water is received by the secondary water-stop seal, and further intrusion of water into the building can be prevented. (For example, refer to Patent Document 1).

  Such a double seal water stop structure is similarly applied to a horizontal joint formed when a building has a protruding portion such as a balcony. One example will be described with reference to FIG. 7 which is a plan view showing a connection portion between the balcony and the building body.

  As shown in FIG. 7, the building body 81 is provided with a balcony 82. The balcony 82 has an overhanging frame 84 using a part of the main body frame 83, and the side surface of the waist wall is flush with one side surface of the building main body 81. For this reason, the waist wall panel 85 which comprises a waist wall is attached to the overhang | projection frame 84 in the state located side by side with the outer wall panel 86 of the building main body 81. FIG. The balcony 82 is installed with its waist wall straddling a horizontal joint provided between the upper and lower outer wall panels, and the upper end of the balcony 82 projects from the upper and lower middle portions of the upper floor outer wall panel 86. Therefore, the outer wall panel 86 in FIG. 7 is shown in cross section, and the waist wall panel 85 is shown in its upper end surface. An upper floor corner outer wall panel is installed above the building body side end of the waist wall panel 85, and a horizontal joint 87 extending in an L shape along the horizontal direction is provided on the upper floor corner outer wall panel. It is formed between the corner outer wall panels.

  As the water stop structure of the horizontal joint 87, a secondary water stop seal 88 (88a, 88b) made of a fixed seal is provided, and is held in a state sandwiched between the waist wall panel 86 and the upper floor corner outer wall panel. The secondary water stop seal 88 is composed of a cross joint accessory 88a and a horizontal secondary water seal 88b having a transverse T shape. The two are pressed against each other at the joint, and the opposite end is attached to the upper end surface of the waist wall panel 85 in close contact with the vertical frame member 86A of the outer wall panel 86. And although illustration is abbreviate | omitted, the primary water stop seal | sticker which consists of an indefinite shape seal is provided in the outdoor side of this secondary water seal 88. This double seal water stop structure enhances the water stop of the horizontal joint 87 and prevents water from entering the building.

JP 2003-119916 A

  Returning to the waterproof structure of the vertical joint and the horizontal joint formed between the outer wall panels, in the double seal waterproof structure at the vertical joint, the water that has passed through the primary waterproof seal is the secondary waterproof seal. It is discharged to the outdoors from the lower end of the gap.

  On the other hand, in the double seal water stop structure at the horizontal joint, the water that has passed through the primary water seal flows in the horizontal direction, that is, the horizontal direction in which the horizontal joint extends, through the gap between the secondary water seal. In this case, due to the presence of the primary water stop seal, it is difficult to discharge the water flowing in the lateral direction to the outside. However, if the building is provided with a horizontal joint without interruption, the state where it is received by the secondary water-stop seal continues, so there is little possibility that the water will adversely affect the building.

  However, depending on the building, the horizontal joint may be interrupted due to its structure. The water stop structure in this case will be briefly described with reference to FIG. 8. A lower floor outer wall panel 92 is installed on the outdoor side of a steel material 91 that is a framework such as a beam or a column. A primary water seal 94 and a secondary water seal 95 are provided on the horizontal joint 93 between the lower floor outer wall panel 92 and the upper floor outer wall panel. Since the horizontal joint 93 is interrupted at the part where the lower store 96 exists, both the water-stop seals 94 and 95 are end-shaped, and the gap formed between the water-stop seals 94 and 95 at the end is the horizontal direction. It is in the state opened toward

  In such a water stop structure, when the water that has passed through the primary water stop seal 94 flows in the lateral direction as shown by the arrows in FIG. 8 and reaches the ends of the water stop seals 94 and 95, the gap between the seals is reduced. There is a risk of water flowing out of the open end. In this case, there is a concern that the flowing water may enter the indoor side and adversely affect the building in terms of moisture and the like.

  Therefore, the present invention provides a horizontal joint water-stopping structure that can prevent water such as rainwater from entering the indoor side even when the water-stop seal provided on the horizontal joint is end-shaped, and a building including the same. The main purpose is to provide it.

  The present invention employs the following means in order to solve the above problems.

  That is, in the first invention, a water stop seal is provided at a horizontal joint between the outer wall panels in which the exterior material and the base material are assembled, and the water stop seal prevents water from entering from the outside of the building to the indoor side. In the horizontal joint water-stopping structure, the horizontal joint is interrupted, and the water-stop seal is end-shaped, and the end of the end-stop water-stop seal is on the outdoor side of the water-stop seal. It has the damming part which dams the flow of the water which flowed along the direction where a horizontal joint extends.

  According to this configuration, even if rainwater or the like flows along the direction of extension of the horizontal joint (lateral direction) on the outdoor side of the waterproof seal provided on the horizontal joint, the water is still at the end of the waterproof seal. It is dammed by the damming part. Thereby, it can prevent that the water which flows into a horizontal direction flows out from the edge part of a water stop seal | sticker, and penetrate | invades indoor side.

  The damming portion preferably has a water guiding function for guiding the water to the outdoor side in addition to a damming function for damming the flow of water.

  According to this configuration, since the damming portion has a water guiding function, water such as rainwater flowing in the lateral direction is not only dammed but also led to the outdoor side. Thereby, it can be made easy to discharge | emit water to the outdoor side by guidance by the damming part.

  Moreover, when it has a water conveyance function in this way, it is more preferable that the front-end | tip of the said damming part protrudes in the outdoor side rather than the outer surface of the said outer wall panel.

  According to this configuration, since the tip of the damming portion protrudes to the outdoor side from the outer surface of the outer wall panel, the water guided to the outdoor side by the water guiding function is further guided to the outer surface. Thereby, it can prevent reliably that the water which flowed in the horizontal direction and was dammed invades indoor side.

  The damming portion is preferably formed by bending an end portion of the water-stop seal toward the outdoor side of the building.

  According to this configuration, since the damming portion is formed by bending the end portion of the waterstop seal toward the outdoor side, unlike the configuration in which another member is separately provided at the end portion of the waterstop seal, There is no need to consider waterproofing at the boundary between the seal and the damming portion. Thereby, construction of the water stop seal | sticker which has a damming part can be performed easily. In addition, when a dam part has a water conveyance function, in order to perform the water conveyance to the outdoor side smoothly, it is preferable to bend in the curved shape.

  The water-stop seal is preferably made of an elastic material having elasticity, and is formed to be thicker than the interval between the horizontal joints.

  According to this configuration, since the water-stop seal is made of an elastic material, even if the interval between the horizontal joints is slightly different, it can be absorbed, and on-site construction management becomes easy. Also, in the configuration where the damming portion is formed by bending the end of the water-stop seal to the outdoor side, the damming portion is sandwiched in a compressed state by the upper and lower outer wall panels, so the bent state Is easy to maintain.

  The horizontal joint is provided with a primary water seal provided between the exterior materials and a secondary water seal provided between the base materials on the indoor side of the same water seal, and the damming portion. It is preferable that the water stop seal | sticker which has is the said secondary water stop seal.

  In a double water stop structure where the water stop seal is composed of a primary water seal and a secondary water seal, water that has passed through the primary seal and entered the gap between the water seal and the secondary water seal It will not be discharged outside due to the presence of a water seal. Therefore, the problem that water flows in the lateral direction, reaches the end of the water-stop seal, and flows out from the open end of the gap appears remarkably. For this reason, if each said structure is employ | adopted about a secondary water stop seal, the effect acquired by it will also be large.

  Here, as a specific configuration in which the horizontal joint is cut off, an extended lower floor portion that is extended outward from one side surface of the upper floor portion is provided on the lower floor portion of the building body, There may be a case where the horizontal joint is cut off because the upper floor outer wall panel is not provided on the floor. In this case, the interrupted end portion of the horizontal joint is covered with a lower house provided on the extended lower floor portion, and the waterproof seal is provided to reach the end portion of the horizontal joint, and the damming portion Is preferably covered with the lower house.

  According to such a configuration, the end of the water seal having the damming portion is covered with the lower house and is not exposed to the outside, so that the water stoppage at the end of the horizontal joint is increased, and the presence of the damming portion causes the building It is possible to prevent the appearance from being damaged.

  As another specific configuration, the building main body is provided with an overhanging portion projecting outward, and the overhanging portion has an overhanging framework in which a lower end is disposed below the horizontal joint. In the portion, the upper end of the lower floor outer wall panel may be formed lower than the others, and the horizontal joint may be cut off. In this case, it is preferable that the horizontal joint is formed up to the inner side surface of the projecting portion along the direction in which the horizontal joint extends, and the damming portion of the water seal is disposed on the inner side surface.

  According to such a configuration, since the end of the water-stop seal having the damming portion is disposed inside the side surface of the overhanging portion and is not exposed to the outside, the water-stopping property at the end of the horizontal joint is increased, and the damming portion It can prevent the appearance of the building from being damaged by the presence.

  And in the building where a plurality of outer wall panels are provided and the outer wall is configured, the horizontal joint waterstop structure having any one of the above configurations is applied to the horizontal joint formed between the outer wall panels adjacent to each other in the vertical direction. It is preferable. Thereby, the building excellent in the water stop of a horizontal joint is obtained.

The perspective view which shows the outline of the house in 1st Embodiment. Sectional drawing of the outer wall part in the AA cross section of FIG. The disassembled perspective view of the outer wall in the protruding part (B part of FIG. 1) of a lower house. The perspective view which shows the outline of the house in 2nd Embodiment. The partial enlarged front view of the side X of a house. CC sectional drawing in FIG. The top view which shows an example (connection part of a balcony and a building main body) of the conventional horizontal joint waterproof structure. Explanatory drawing explaining the problem in the conventional horizontal joint waterproof structure.

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In this embodiment, a two-story detached house that is built by a steel frame construction method and has an outer wall formed by combining a plurality of outer wall panels is a specific example of the building.

[First Embodiment]
First, a schematic configuration and an outer wall structure of a two-story house in the first embodiment will be briefly described with reference to FIG. FIG. 1 is a perspective view schematically showing the house.

  First, a general configuration of the house will be described. As shown in FIG. 1, the house T1 includes a house body 11 and roofs 16 and 17. The housing body 11 is composed of a first floor portion 12 and a second floor portion 13, and the floor area of the second floor portion 13 is smaller than that of the first floor portion 12. For this reason, the first floor portion 12 is provided with an extended lower floor portion 14 that is extended outward from the one side surface 13 a of the second floor portion 13. The roofs 16 and 17 include a lower house (first floor roof) 16 and a main roof (second floor roof) 17. Is provided. Hereinafter, the one side surface 13a of the second floor portion 13 in contact with the lower store 16 is referred to as the lower store connection surface 13a. And the lower house 16 has the protrusion part 18 in the horizontal direction both ends of the lower house connection surface 13a. The protruding portion 18 is provided so as to go around the lower end side of the protruding corner portion of the lower house connection surface 13a.

  Next, the outer wall structure of the housing body 11 will be described. The first floor portion 12 is provided with a plurality of lower floor outer wall panels 21, and the second floor portion 13 is provided with a plurality of upper floor outer wall panels 22. The lower-floor outer wall panel 21 and the upper-floor outer wall panel 22 are arranged side by side in an upper and lower example, respectively. Further, in both the first floor portion 12 and the second floor portion 13, corner outer wall panels 23 and 24 are provided at the protruding corner portions of the outer wall. For this reason, the outer wall of the house T1 is constituted by the outer wall panels 21 and 22 on the upper and lower floors and the corner outer wall panels 23 and 24 on the upper and lower floors.

  Each of these outer wall panels 21-24 is arrange | positioned at fixed intervals of about 10 mm, for example. Therefore, due to the gap, between the lower floor outer wall panels 21 and between the lower floor outer wall panel 21 and the lower floor corner outer wall panel 23, between the upper floor outer wall panels 22 and between the upper floor outer wall panel 22 and the upper floor corner outer wall panel 24, A vertical joint 25 is formed between the two. A horizontal joint 26 is also formed between the lower floor outer wall panel 21 and the lower floor corner outer wall panel 23 and the upper floor outer wall panel 22 and the upper floor corner outer wall panel 24. The vertical joint 25 and the horizontal joint 26 are subjected to water stop treatment in order to prevent water such as rainwater from entering the indoor side.

  Next, the water stop structure of the horizontal joint 26 will be described in detail with reference to FIG. FIG. 2 is a cross-sectional view of the outer wall portion in the AA cross section of FIG.

  As shown in FIG. 2, each of the outer wall panels 21 and 22 on the upper and lower floors includes an exterior material 31 exposed to the outdoors and an exterior frame 32 fixed to the back side thereof, and both of them are assembled. ing. The exterior material 31 is a siding formed of a material having excellent weather resistance such as a ceramic industry. The appearance of the house T1 is determined, and the surface is provided with a concavo-convex pattern or the like in order to enhance the design. The exterior frame 32 (corresponding to the base material) is constituted by frame members 33 and 34 having a U-shaped cross section, and the strength of the outer wall panel is enhanced by the rigidity thereof. The exterior frame 32 is connected to the second-floor receiving beam 36 via a mounting plate 35 or the like by a fixture 37 such as a bolt, whereby the outer wall panels 21 and 22 are attached to the frame (beams or the like) of the house T1. ing.

  The corner outer wall panels 23 and 24 on the upper and lower floors have the same configuration as that of the outer wall panels 21 and 22 described above. However, unlike the outer wall panels 21 and 22 on the upper and lower floors formed in a flat plate shape, each of the corner outer wall panels 23 and 24 has an L shape bent substantially at a right angle, and the shape of the exterior material 31 and the exterior frame 32 Is also corresponding to it.

  The horizontal joint 26 is provided with a primary waterproof seal 41 made of an irregular seal between the exterior materials 31 of the lower floor outer wall panel 21 and the upper floor outer wall panel 22. The amorphous seal is a waterproof material that is fixed by filling a joint with a paste-like irregular resin material. On the back side (indoor side) of the primary water seal 41, a secondary water seal 42 made of a fixed seal is provided. The secondary water seal 42 is formed thicker than the horizontal joint 26 by an elastic resin material such as ethylene / propylene / diene rubber (EPDM). Therefore, the secondary water seal 42 is interposed in a compressed state between the upper frame member 33 constituting the first floor side exterior frame 32 and the lower frame member 34 constituting the second floor side exterior frame 32. Yes.

  Here, returning to FIG. 1 and looking at the outer wall structure of the house T1, the extended lower floor portion 14 of the first floor portion 12 is not provided with the upper floor outer wall panel 22, and the lower floor connecting surface 13a of the second floor portion 13. Then, the lower-floor outer wall panel 21 is not installed. Therefore, in these places, the vertical joints 25 are formed only on either the first floor part 12 or the second floor part 13 and are continuously formed on the upper and lower floors through the intersection 27 with the horizontal joints 26 as in other parts. It is not in a state. Moreover, since the horizontal joint 26 is not formed in the above-mentioned location, as shown by the thick line in FIG. 1, the horizontal joint 26 is in an interrupted state.

  Thus, even if the horizontal joint 26 is not formed on the lower connection surface 13 a, the horizontal joint non-formation portion is covered with the lower house 16. Further, in the house T1, since the lower house 16 has the protruding portion 18, both end portions of the horizontal joint 26 are covered with the protruding portion 18 and are not exposed. For this reason, construction of a water stop process is not requested | required in the horizontal joint non-formation part of the lower part connection surface 13a.

  But about the water stop structure of the edge part of the horizontal joint 26, the water which passed through the primary water stop seal 41 and entered the clearance with the secondary water stop seal 42 flows out from the open end of the clearance. There is a need to improve. Since the present embodiment has a characteristic configuration in consideration of this point, the water stop structure at the end of the horizontal joint will be described next with reference to FIG. FIG. 3 is an exploded perspective view of the outer wall at the protruding portion (B portion in FIG. 1) of the lower house.

  As shown in FIG. 3, in the protruding portion 18 of the lower house 16, a pair of lower floor outer wall panels 21, an upper floor outer wall panel 22 and an upper floor corner outer wall panel 24 are provided to constitute the outer wall. Has been. These outer wall panels 21, 22, and 24 form a vertical joint 25 and a horizontal joint 26, and an intersecting portion 27 where they intersect. The vertical joint 25 is formed continuously up and down via the intersecting portion 27, and the peripheral portion of the intersecting portion 27 is covered with the protruding portion 18. On the other hand, the horizontal joint 26 is interrupted up to a portion formed between the lower floor outer wall panel 21 and the upper floor corner outer wall panel 24. Then, the disconnected end portion side and the peripheral portion of the intersecting portion 27 are covered with the protruding portion 18.

  If the horizontal joint 26 is further demonstrated, the secondary water stop seal 42 is provided until it reaches the one end part which interrupted. For this reason, the secondary water seal 42 is formed in an end shape, and the length L1 of the portion beyond the intersecting portion 27 is formed to be substantially the same as the lateral width L2 of the one surface of the upper floor corner outer wall panel 24. ing. In addition, a curved portion 43 is formed at the end of the secondary water seal 42. The curved portion 43 is bent so that the end portion of the secondary water-stop seal 42 is curved toward the outdoor side, and its tip protrudes to the outdoor side from the outer surface of each outer wall panel 21, 22, 24. It has become a state. The curved portion 43 guides the water flowing along the horizontal joint 26 to the outdoor side while blocking the flow. Therefore, the curved portion 43 corresponds to a damming portion having a function of guiding water to the outdoor side.

  In addition, during the construction of the house T1, after the installation of the outer wall panels 21 and 23 on the lower floor side and before the installation of the outer wall panels 22 and 24 on the upper floor side, The secondary waterproof seal 42 is bonded to the end surface with an adhesive or the like. In the bonding step, the end portion of the secondary water-stop seal 42 is bent to form the curved portion 43. And since the part beyond the crossing part 27 among the secondary waterproofing seals 42 is pinched in the compressed state between the lower floor outer wall panel 21 and the upper floor corner outer wall panel 24, it is curved by the pinching. The shape of the portion 43 can be maintained.

  Even if the end portion of the secondary water seal 42 is interrupted and the curved portion 43 is formed, the portion is covered with the protruding portion 18 of the lower house 16 and is not exposed to the outside. And not. Moreover, although the primary water stop seal 41 is omitted in FIG. 3, it is arbitrary up to which part of the end portion of the horizontal joint 26 the primary water seal 41 is provided. In addition, in FIG. 3, although the structure of the protrusion part 18 in the B part of FIG. 1 is demonstrated, since the same structure is provided also in the protrusion part 18 on the opposite side, the description about the part is provided. Omitted.

  Since the end of the horizontal joint 26 has the water stop structure as described above, the flow of water that has passed through the primary water seal 41 and entered the gap between the secondary water seal 42 is as follows. . First, the water is received by the secondary water stop seal 42. When the infiltrated water flows in the lateral direction, that is, in the direction in which the horizontal joint 26 extends and reaches the seal end, the flow is blocked by the curved portion 43 and flows along the shape of the curved portion 43. Led to the outdoor side. Then, it flows down from the horizontal joint 26 along the outer surface of the lower floor outer wall panel 21 and is discharged. Thereby, even if the water that has entered the gap with the secondary water-stop seal 42 reaches the end of the end seal, the risk of the water entering the indoor side is greatly reduced.

[Second Embodiment]
Next, a second embodiment will be described. In this embodiment as well, a two-story detached house built by a steel frame construction method will be described as a specific example of the building, and the difference from the configuration of the first embodiment will be mainly described. In the description, the same members and the like are appropriately denoted by the same names and reference numerals, and detailed description thereof is omitted.

  First, the outline and outer wall structure of the two-story house in the second embodiment will be described with reference to FIGS. 4 to 6. 4 is a perspective view showing a schematic configuration of the house, FIG. 5 is a partially enlarged front view of a side surface X of the house, and FIG. 6 is a cross-sectional view taken along the line CC in FIG.

  First, as shown in FIG. 4, the house T <b> 2 also includes a house body 51 and a roof 56, and the house body 51 is composed of a first floor portion 52 and a second floor portion 53. Further, as the outer wall structure of the housing body 51, a plurality of lower floor outer wall panels 21, upper floor outer wall panels 22, lower floor corner outer wall panels 23, and upper floor corner outer wall panels 24 are provided.

  However, in the house T2 of this embodiment, since the floor area is substantially the same in the first floor portion 52 and the second floor portion 53, portions corresponding to the extended lower floor portion 14 and the lower house 16 in the house T1 of the first embodiment. Does not exist. Instead, a cantilever balcony 57 (corresponding to an overhanging portion) protruding outward from one side surface of the house T2 is provided. The cantilever balcony 57 has its waist wall straddling the horizontal joint 26, and its upper end projects from the second floor portion 53 and its lower end projects from the first floor portion 52. Further, it has a width across a plurality of (three in FIG. 4) vertical joints 25. A space surrounded by the cantilever balcony 57 is a balcony space 58.

  As shown in FIGS. 5 and 6, the cantilever balcony 57 has an overhanging framework 61 connected to the housing body 51. The overhanging skeleton 61 includes a cantilever beam 62 that is connected to a skeleton (beams, columns, etc.) 54 of the housing body 51 and protrudes outward, and its lower end is disposed below the horizontal joint 26. A part of the waist wall panel 63 is shown in FIG. 6, but a plurality of waist wall panels 63 are provided so as to form a U-shape in plan view over the entire outer surface side of the overhanging frame 61. Each waist wall panel 63 is composed of an exterior material 64 and an exterior frame 65 in the same manner as the above-described outer wall panels 21 to 24. In addition, on the balcony space side of the overhang frame 61, as shown in FIG. 5, a floor component 66 made of cellular concrete such as ALC, waterproof pan, balcony flooring, and the like is provided.

  By providing such a cantilever balcony 57 on one side X of the house T2, the lower floor outer wall panel 21 is formed in a different shape from the other lower floor outer wall panels 21 in that portion. Referring to FIG. 5 in detail, at the portion where the cantilever balcony 57 is installed, the lower floor outer wall panel 21 includes a cantilever first outer wall panel 71 and cantilever second outer wall panels 72 provided on both sides thereof. It is used. Both the outer wall panels 71 and 72 have the same basic configuration as the other lower floor outer wall panels 21 (the exterior material 31 and the exterior frame 32). However, the upper end height of the cantilever first outer wall panel 71 is lower than that of the other lower floor outer wall panels 21 by, for example, about 300 mm. Further, the cantilever second outer wall panel 72 is formed with a cantilever beam installation portion 73 having a shape in which the upper end corner on the side adjacent to the cantilever first outer wall panel 71 is cut, and the cantilever beam 62 is installed there. Has been.

  And since the lower floor outer wall panels 71 and 72 in a balcony installation part have the said shape, between the cantilever installation parts 73, the horizontal joint 26 and the crossing part between the lower ends of the upper floor outer wall panel 22 are provided. 27 is not formed. Therefore, as shown by the thick line in FIG. 4, the horizontal joint 26 is in a state of being interrupted at both ends in the horizontal direction of the cantilever balcony 57.

  Thus, even if the horizontal joint 26 is not formed on the installation part of the cantilever balcony 57, the horizontal joint non-formation part and both ends of the horizontal joint 26 are the waist wall panel 63 of the cantilever balcony 57, the floor constituent member 66, etc. Uncovered by the cover. For this reason, construction of a water stop process is not requested | required in the horizontal joint non-formation part in the side surface X of the housing main body 51. FIG.

  However, as in the first embodiment, the water that has entered the gap between the primary water-stop seal 41 and the secondary water-stop seal 42 in the water stop structure at the end of the horizontal joint 26 is also in this gap. There is a need to improve the problem of flowing out of the open end. Since this embodiment also has a characteristic configuration in consideration of this point, the water stop structure at the end of the horizontal joint will be described next with reference to FIG.

  As shown in FIG. 6, a waist wall panel 63 is provided on the outdoor side of the cantilever beam 62 that constitutes the overhang framework 61 at one end in the lateral direction of the cantilever balcony 57 (left end in FIG. 5). The horizontal joint 26 is formed up to the cantilever installation portion 73 of the cantilever second outer wall panel 72 and is not formed between the cantilever installation portion 73 and the upper end of the cantilever first outer wall panel 71. That is, the horizontal joint 26 is cut off at the cantilever beam installation portion 73.

  The horizontal joint 26 is provided with a secondary water seal 42 until it enters the inside (the balcony space 58 side) from the outer surface of the waist wall panel 63, and the secondary water seal 42 is formed in an end shape. Yes. A curved portion 44 is formed at the end of the secondary water seal 42. The curved portion 44 is bent so that the end portion of the secondary water-stop seal 42 is curved toward the outdoor side, that is, the side surface of the waist wall panel 63, inside the outer surface of the waist wall panel 63, and The tip is in a state of projecting from the outer surface of the cantilever second outer wall panel 72 to the outdoor side. By this curved portion 44, the water flowing along the horizontal joint 26 is blocked and guided to the outdoor side. Therefore, the curved portion 44 corresponds to a damming portion having a function of guiding water to the outdoor side.

  It should be noted that the length L3 that enters the inner side of the outer surface of the waist wall panel 63 at the end of the secondary water seal 42 is secured to maintain the state in which the curved portion 44 is formed at the end. Has been. Further, the point that the curved portion 44 is formed in the bonding process of the secondary water-stop seal 42 is as described in the first embodiment. And since the secondary water stop seal 42 is sandwiched in a compressed state between the cantilever second panel 72 and the upper floor outer wall panel 22 disposed above, the sandwiched portion of the bending portion 44 is sandwiched. The shape can be maintained.

  Even if the end portion of the secondary water seal 42 has such a configuration, the portion is hidden by the waist wall panel 63 or the like and cannot be visually recognized from the outside, so that it is not particularly problematic in appearance. . Further, the primary water seal 41 is not shown in the figure, but the portion of the primary water seal 41 that is provided inside the outer surface of the waist wall panel 63 is arbitrary. In addition, although the structure of the left end part of the cantilever 57 in FIG. 5 is demonstrated here, since the same structure is provided also in the right end part, description about the part is abbreviate | omitted.

  Since the end of the horizontal joint 26 has the water stop structure as described above, the flow of water that has passed through the primary water seal 41 and entered the gap between the secondary water seal 42 is as follows. . First, the water is received by the secondary water stop seal 42. Then, when the infiltrated water flows in the lateral direction and reaches the seal end portion, the flow is blocked by the curved portion 44 and flows along the shape of the curved portion 44 and is guided to the outdoor side. Then, it flows down along the outer surface of the cantilever part 2nd outer wall panel 72 from the horizontal joint 26, and is discharged | emitted. Thereby, even if the water that has entered the gap with the secondary water-stop seal 42 reaches the end of the end seal, the risk of the water entering the indoor side is greatly reduced.

[Effects of both embodiments]
In summary, the first and second embodiments can provide the following advantageous effects.

  (1) The curved parts 43 and 44 are formed in the edge part of the secondary water stop seal | sticker 42 made into the end shape because the horizontal joint 26 has interrupted. Therefore, when water such as rainwater that has passed through the primary water stop seal 41 flows in the lateral direction, the water is blocked by the curved portions 43 and 44 and guided to the outdoor side. Thereby, it can prevent that the water which flows into a horizontal direction flows out from the clearance gap between the both water-stop seals 41 and 42, and penetrate | invades indoor side.

  (2) The ends of the curved portions 43 and 44 protrude outward from the outer surfaces of the outer wall panels 21 and 72. For this reason, the water that has flowed to the end portions of the both water-stop seals 41 and 42 is guided to the outer surfaces of the outer wall panels 21 and 72 by the curved portions 43 and 44. Thereby, it is possible to reliably prevent the blocked water from entering the indoor side.

  (3) The curved portions 43 and 44 are formed by bending the end portion of the secondary water seal 42 toward the outdoor side. For this reason, unlike the configuration in which another member is separately provided at the end of the secondary water seal 42, there is no need to consider waterproofing at the boundary between the secondary water seal 42 and the curved portions 43 and 44. Thereby, construction of the secondary water stop seal 42 having the curved portions 43 and 44 can be easily performed. Moreover, by having a curved shape, water can be smoothly guided to the outdoor side.

  (4) Since the secondary water stop seal 42 is made of an elastic material, even if the distance between the horizontal joints 26 is slightly different, it can be absorbed, and the construction management at the site becomes easy. Further, since the curved portions 43 and 44 are sandwiched between the upper and lower outer wall panels 21, 24, 72 and 22, the curved shape can be easily maintained.

  (5) The end portion of the secondary water seal 42 having the curved portions 43 and 44 is covered by the lower house 16 in the first embodiment, and is provided inside the outer surface of the waist wall panel 63 in the second embodiment. Not exposed to. For this reason, the water stop of the edge part of the horizontal joint 26 is raised, and it can prevent that the beauty | look of the house T1, T2 is impaired by presence of the curved parts 43 and 44. FIG.

[Other Embodiments]
It should be noted that the present invention is not limited to the embodiment described above, and may be implemented in the form shown as another example below.

  (A) In the above embodiment, the curved portions 43 and 44 formed at the end of the secondary water seal 42 correspond to the damming portion, but form a predetermined angle (for example, a right angle) instead of the curved shape. It may be formed so as to have other shapes such as a bent portion bent in this manner.

  Moreover, although the curved parts 43 and 44 have the front-end | tip protruded to the outdoor side from the outer surface of the outer wall panels 21 and 72, you may make it arrange | position a front-end | tip to the indoor side rather than the outer surface. This is because even in this case, it is possible to secure the water blocking function and the water guiding function to the outdoor side. However, in order to make both of these functions sufficient, it is preferable to have the configuration of the above-described embodiment in which the tip protrudes outward from the outer surface.

  Further, the curved portions 43 and 44 are formed by bending the end portion of the secondary water-stop seal 42. However, a curved member formed in a bent shape is separately prepared, and the curved member is fixed to the secondary waterproof seal 42. You may employ | adopt the structure provided in the edge part of the water seal 42. FIG. In that case, the material of the bending member may be the same resin material as the secondary water seal 42 or another material such as metal.

  (B) In the above-described embodiment, the curved portions 43 and 44 as damming portions have a water guiding function to the outdoor side, but the water guiding function is not essential and has at least a damming function. If it is, it is enough. For example, a configuration in which a damming member having a U shape in plan view is provided at the end of the secondary water seal 42 may be employed.

  (C) In the above-described embodiment, the end portions of the secondary waterstop seal 42 are formed with the curved portions 43 and 44 at both ends thereof, provided that they are formed at at least one of the end portions. Good. Even in this case, the end portion having the curved portions 43 and 44 can reduce the possibility of water entering the outdoor side unlike the conventional technology. However, in order to improve the effect of preventing water from entering the indoor side, the configuration of the above embodiment having the curved portions 43 and 44 at both ends is preferable.

  (D) In the above embodiment, as the water stop seal of the horizontal joint 26, the primary water stop seal 41 made of an irregular shape seal and the secondary water stop seal 42 made of a fixed shape seal are provided on the indoor side. The primary water seal 41 may be omitted. Further, even when the primary water seal 41 is provided, it may be a fixed seal. However, the configuration of the above embodiment can be said to be optimal in consideration of ensuring high waterproofness and workability of the water-stop seal.

  (E) In the above-described embodiment, as a factor that the horizontal joint 26 is interrupted, the extended lower floor portion 14 is provided in the first floor portion 12 (first embodiment), or the cantilever balcony 57 is provided in the housing body 51 ( The second embodiment) is described as an example. This is just an example, and the cause of the break in the horizontal joint 26 may be a case where a projecting part such as a bay window, a fence, a flower box, etc. is provided in the building body.

  (F) In the above embodiment, a two-story detached house by the steel frame construction method is used as a specific example of the building. However, in the building in which the horizontal joint 26 is formed by the lower-floor outer wall panel 21 and the upper-floor outer wall panel 22. If so, the type of building is not limited. For example, the building may be a building constructed by a conventional construction method, a unit type building, a building other than a house such as a store or a warehouse, or a building such as an apartment house.

  DESCRIPTION OF SYMBOLS 11 ... Housing main body (building main body), 12 ... First floor part (lower floor part), 13 ... Second floor part (upper floor part), 14 ... Extended lower floor part, 16 ... Lower house, 21 ... Lower floor outer wall panel, 22 ... upper floor outer wall panel, 23 ... lower floor corner outer wall panel, 24 ... upper floor corner outer wall panel, 26 ... horizontal joint, 31 ... exterior material, 32 ... exterior frame (base material), 41 ... primary water seal, 42 ... Secondary water seal (water seal), 43, 44 ... curved portion (damming portion), 51 ... housing body (building body), 57 ... cantilever balcony (overhang portion), 61 ... overhang frame, T1, T2 ... Housing (building).

Claims (9)

In the horizontal joint water stop structure where a water stop seal is provided in the horizontal joint between the outer wall panels formed by assembling the exterior material and the base material, and the water stop seal prevents water from entering from the outside of the building to the indoor side.
The horizontal joint is interrupted and the water stop seal has an end shape. The end of the end water stop seal is along the direction in which the horizontal joint extends on the outdoor side of the water stop seal. A horizontal joint water-stopping structure characterized by having a damming portion that dams the flowing water.   2. The horizontal joint structure according to claim 1, wherein the damming unit has a water guiding function of guiding the water to the outdoor side in addition to a damming function of damming the flow of water.   The horizontal joint waterproof structure according to claim 2, wherein a tip of the damming portion protrudes to an outdoor side from an outer surface of the outer wall panel.   4. The horizontal joint water stop according to claim 1, wherein the damming portion is formed by bending an end portion of the waterstop seal toward the outdoor side of the building. 5. Construction.   5. The horizontal joint waterproof structure according to claim 1, wherein the waterproof seal is made of an elastic material having elasticity and is formed to be thicker than an interval between the horizontal joints. The horizontal joint is provided with a primary waterproof seal provided between the exterior materials, and a secondary waterproof seal provided between the base materials on the indoor side of the same primary waterproof seal,
The horizontal joint waterproof structure according to any one of claims 1 to 5, wherein the waterproof seal having the damming portion is the secondary waterproof seal. The lower floor portion of the building body is provided with an extended lower floor portion that is extended outward from one side surface of the upper floor portion, and since the upper floor outer wall panel is not provided in the extended lower floor portion, the horizontal joint is formed. It is in a discontinuous state, and further, the discontinuous end of the horizontal joint is covered by a lower house provided on the extended lower floor,
The horizontal joint according to any one of claims 1 to 6, wherein the water stop seal is provided up to an end of the horizontal joint, and the dam part is also covered by the lower house. Water stop structure. The building body is provided with an overhanging portion that protrudes outward, and the overhanging portion has an overhanging frame in which the lower end is disposed below the horizontal joint, so that the upper end of the lower floor outer wall panel is in that portion. It is formed lower than the others, and the horizontal joint is in a disconnected state,
The said horizontal joint is formed in the side surface inner side of the said overhang | projection part along the direction where the said horizontal joint extends, The damming part of the said water stop seal is arrange | positioned in the side surface inner side. The horizontal joint waterproof structure according to any one of items 1 to 6. In buildings where the outer wall is configured with multiple outer wall panels,
A building having a horizontal joint water stop structure according to any one of claims 1 to 8, wherein the horizontal joint formed between the upper and lower adjacent outer wall panels.

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