Joint sealant and joint structure

Abstract

To provide a joint seal material which has an excellent sealing function with a simple structure, and whose exterior appearance is improved.SOLUTION: A joint seal material is an integrally molded product having: a body part 31 fixed at an upper part of outer wall panels 2A, 2B; seal parts 32, 33 extended from the body part 31, and coming to an elastic contact with a lower frame 4 of a sash 3; a support lip part 34 extending further upward from the outdoor side than the seal part 32, and having flexibility; a first connection part 35 extending obliquely upward from an end part of the support lip part 34, and formed with a flat part H pressed against the lower frame 4 at an upper end; a second connection part 36 extending obliquely downward from the upper end of the first connection part 35; and a covering part 37 suspended downward from the second connection part 36. When the first connection part 35 is pressed against the lower frame 4, the support lip part 34 curves so as to be tilted to the outdoor side, and the first connection part 35, the second connection part 36 and the covering part 37 rotate around a fulcrum P in a direction approaching the body part 31, and the flat part H is pressed against the lower frame 4 and the covering part 37 covers the outer wall panels.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a joint sealant and a joint structure. More specifically, the present invention relates to a joint sealant that is attached to a horizontal joint formed between an upper portion of an exterior wall panel installed on the exterior wall of a house and a bottom frame of a sash, and that prevents water from entering the interior through the horizontal joint, and to a joint structure to which the joint sealant is attached. [Background technology]

[0002] Conventionally, as shown in FIG. 7, a dry joint sealant 10 is attached to a horizontal joint M formed between an upper portion of an exterior wall panel 2 provided on an exterior wall 1 of a house and a bottom frame 4 of a sash 3 to prevent water from entering the interior through the horizontal joint M (Patent Document 1).

[0003] This joint sealant 10 comprises a square cylindrical sealant body 11 and a filler 12 filled inside the sealant body 11, with a fin portion 13 provided at the bottom of the sealant body 11 in contact with the indoor side of the edge portion 2a of the exterior wall panel 2, and a protruding piece 14 provided at the top of the seal-like body 11 in contact with the bottom frame 4 of the sash 3. In addition, the joint sealant 10 is fixed to the bottom frame 4 of the sash 3 with an elastic adhesive material 15.

[0004] According to this, by engaging the edge 2a of the exterior wall panel 2 with the fin portion 13, the joint processing can be performed to maintain watertightness, making the joint processing work easy, and since the exterior wall panel 2 can be attached to match the fin portion 13, the spacing of the joints (horizontal joints M) can be made uniform, resulting in a better appearance.

[0005] However, there is a restriction that the edge 2a of the exterior wall panel 2 must protrude upward so that the fin portion 13 can be engaged. In addition, the sealing performance is not sufficient because the fin portion 13 is simply engaged with the exterior wall panel 2. In particular, since the surface of the exterior wall panel 2 may be rough, there is a risk that water may seep inside the room between the edge portion 2a of the exterior wall panel 2 and the fin portion 13.

[0006] Furthermore, when at least two exterior wall panels 2A, 2B are installed side by side on the left and right sides at the bottom of the bottom frame 4 of the sash 3 as shown in Figure 8, there is a possibility that a step will occur between the two exterior wall panels 2A, 2B due to vertical variation during construction, resulting in a poor appearance when viewed from outside.

[0007] On the other hand, as shown in Figure 9, a joint sealant 20 consisting of a synthetic rubber sealing member 21 and a metal (aluminum) mounting frame 22 is also known, which is attached to a horizontal joint M formed between the upper part of an exterior wall panel 2 and the bottom frame 4 of a sash 3 (Patent Document 2). The seal member 21 and mounting frame 22 are assembled by fitting a mounting portion 22a with a T-shaped cross section provided on the indoor side of the mounting frame 22 into a T-shaped notch 21a formed in the seal member 21. The upper part of the mounting frame 22 is attached to the bottom frame 4 of the sash 3 with screws 23. Two protrusions 21b, 21c are provided on the lower side of the seal member 21, and are in elastic contact with the upper part of the exterior wall panel 2. In addition, the mounting frame 22 is formed on the outdoor side with a drainage portion 22b extending downward.

[0008] According to this, it is not necessary to protrude the upper part (edge ​​part 2a) of the exterior wall panel 2 as shown in FIG. 7, however, the sealing member 21 is fixed to the bottom frame 4 side of the sash 3, and the two protrusions 21b, 21c are elastically in contact with the exterior wall panel 2, which has a rougher surface than the sash 3, so the sealing performance is insufficient and water is likely to accumulate on the contact surface of the protrusions 21b, 21c with the exterior wall panel 2. This creates the risk of water seeping in from there to the inside of the room. In addition, a water drainage portion 22b is formed below the mounting frame 22, but the lower end of the water drainage portion 22b is located higher than the upper surface of the exterior wall panel 2. Therefore, if a step occurs between the two exterior wall panels 2A, 2B as shown in Figure 8, it cannot be covered or hidden. Furthermore, since the joint sealant 20 is composed of two members (the sealant 21 and the mounting frame 22) made of different materials, the structure becomes accordingly complicated, resulting in a problem of increased costs. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2000-179058 A [Patent Document 2] Japanese Patent Application Publication No. 8-170469 Summary of the Invention [Problem to be solved by the invention]

[0010] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a joint sealant and joint structure which has a simple structure, excellent sealing function and also has a good appearance. [Means for solving the problem]

[0011] In order to achieve the above object, the joint sealant of the present invention is a dry joint sealant (30) to be attached to a horizontal joint (M) formed between an upper portion of an exterior wall panel (2A, 2B) provided on an exterior wall (1) of a house and a bottom frame (4) of a sash (3), A main body portion (31) fixed to an upper portion of the exterior wall panel (2A, 2B) and extending laterally; a seal portion (32, 33) extending upward from the main body portion (31) and elastically contacting the bottom frame (4) of the sash (3); a flexible support lip portion (34) that extends obliquely upward and toward the outdoors from a position on the outdoors side relative to the base positions of the seal portions (32, 33) relative to the main body portion (31); a first connecting portion (35) extending obliquely upward and toward the exterior from an end of the support lip portion (34), with a flat portion (H) formed at its upper end, the flat portion (H) being pressed against the bottom frame (4) of the sash (3); a second connecting portion (36) extending obliquely from an upper end of the first connecting portion (35) toward the exterior and having a lower end located toward the exterior side of the exterior side surface of the exterior wall panel (2A, 2B); a covering portion (37) that is hung downward from the lower end of the second connecting portion (36) and covers the exterior wall panel (2A, 2B) from the outdoor side; When the first connecting portion (35) is not pressed against the bottom frame (4) of the sash (3), the first connecting portion (35), the second connecting portion (36) and the cover portion (37) are located above and away from the main body portion (31) with the connection portion of the support lip portion (34) and the first connecting portion (35) serving as a fulcrum (P). However, when the first connecting portion (35) is pressed against the bottom frame (4) of the sash (3), the support lip portion (34) tilts toward the outside. and the first connecting portion (35), the second connecting portion (36) and the covering portion (37) rotate about the fulcrum (P) in a direction approaching the main body portion (31) so that the flat portion (H) is pressed against the bottom frame (4) of the sash (3), and the covering portion (37) becomes parallel to the exterior side of the exterior wall panels (2A, 2B) at a certain distance (L) and covers the exterior wall panels (2A, 2B).

[0012] The present invention is also characterized in that it further comprises a holding member (38) that connects a lower portion of the first connecting portion (35) and the indoor side surface of the covering portion (37).

[0013] The present invention is also characterized in that the retaining member (38) has a generally L-shaped cross section, and when the first connecting portion (35) is pressed against the bottom frame (4) of the sash (3), the indoor side of the corner portion (38c) of the retaining member (38) abuts against the outdoor end portion (31a) of the main body portion (31).

[0014] In addition, the present invention is characterized in that a rubber sponge material is provided between the main body portion (31) and the upper portion of the exterior wall panel (2A, 2B).

[0015] In addition, the present invention is characterized in that the main body portion (31) is fixed to the upper portion of the exterior wall panel (2A, 2B) via a butyl tape (B) or a double-sided tape.

[0016] The joint structure of the present invention is a joint structure in which a dry joint sealant (30) is attached to a horizontal joint (M) formed between the upper part of two exterior wall panels (2A, 2B) arranged side by side on the left and right of an exterior wall (1) of a house and a lower frame (4) of a sash (3) so as to bridge the two exterior wall panels (2A, 2B) to seal the horizontal joint (M), The joint sealant (30) is A main body portion (31) fixed to the upper portion of the two exterior wall panels (2A, 2B) and extending laterally; a seal portion (32, 33) extending upward from the main body portion (31) and elastically contacting the bottom frame (4) of the sash (3); a flexible support lip portion (34) that extends obliquely upward and toward the outdoors from a position on the outdoors side relative to the base positions of the seal portions (32, 33) relative to the main body portion (31); a first connecting portion (35) extending obliquely upward and toward the exterior from an end of the support lip portion (34), with a flat portion (H) formed at its upper end, the flat portion (H) being pressed against the bottom frame (4) of the sash (3); a second connecting portion (36) extending obliquely from an upper end of the first connecting portion (35) toward the exterior and having a lower end located toward the exterior side of the exterior side surface of the exterior wall panel (2A, 2B); a covering portion (37) that is hung downward from the lower end of the second connecting portion (36) and covers the exterior wall panel (2A, 2B) from the outdoor side; When the first connecting portion (35) is not pressed against the bottom frame (4) of the sash (3), the first connecting portion (35), the second connecting portion (36) and the cover portion (37) are located above and away from the main body portion (31) with the connection portion of the support lip portion (34) and the first connecting portion (35) serving as a fulcrum (P). However, when the first connecting portion (35) is pressed against the bottom frame (4) of the sash (3), the support lip portion (34) tilts toward the outside. and the first connecting portion (35), the second connecting portion (36) and the covering portion (37) rotate about the fulcrum (P) in a direction approaching the main body portion (31) so that the flat portion (H) is pressed against the bottom frame (4) of the sash (3), and the covering portion (37) becomes parallel to the exterior side of the exterior wall panels (2A, 2B) at a certain distance (L) and covers the exterior wall panels (2A, 2B).

[0017] In addition, the present invention provides a method for installing the two exterior wall panels (2A, 2B) in a building, the two exterior wall panels (2A, 2B) being fixed to a frame (40) that is provided on the indoor side and has an upper surface at the same height, The main body (31) of the joint sealant (30) is characterized in that it is fixed not only to the two exterior wall panels (2A, 2B) but also to the frame (40) via butyl tape (B) or double-sided tape.

[0018] Note that symbols in parentheses indicate corresponding elements or matters described in the drawings and in the detailed description of the invention described below. Effect of the Invention

[0019] According to the present invention, when the joint sealant is attached to the horizontal joint formed between the upper part of the exterior wall panel and the bottom frame of the sash, the sealing portion flexes and elastically contacts the bottom frame of the sash to seal, and the main body portion is fixed to the exterior wall panel to seal, thereby preventing water from entering the interior from the outdoors. Furthermore, when the first connecting portion extending from the end of the support lip portion provided on the outdoor side of the seal portion is not pressed against the bottom frame of the sash, the first connecting portion, the second connecting portion and the cover portion are located above and away from the main body portion, with the connection portion between the support lip portion and the first connecting portion as the fulcrum, but when a joint sealant is attached to the horizontal joint and the first connecting portion is pressed against the bottom frame of the sash, the support lip portion curves so as to tilt toward the outdoor side, and the first connecting portion, the second connecting portion and the cover portion rotate around the fulcrum in a direction approaching the main body portion, so that the flat portion formed on the first connecting portion is pressed against the bottom frame of the sash. As a result, the cover portion becomes parallel to the outdoor side of the exterior wall panel at a certain distance from the outdoor side to the outdoor side, covering the exterior wall panel, so that the upper part of the exterior wall panel together with the horizontal joint is covered from the outdoor side and looks good. In addition, the height of the joint sealant visible from the outside, i.e., the distance from the bottom frame of the sash to the bottom end of the cover portion, is always the same and forms a horizontal straight line, so it can be set to a preset height.

[0020] Furthermore, according to the present invention, there are two exterior wall panels arranged side by side on the bottom frame of the sash, and even if the heights of their upper surfaces are not the same and there is a step due to variations in construction, for example, the upper surfaces of the exterior wall panels are covered from the exterior side by the covering part of the joint sealant, and even if the heights of the upper surfaces of the two exterior wall panels are different, the lower ends of the covering parts appear as lines extending horizontally from left to right, so that they look good when viewed from the exterior side.

[0021] In addition, since the joint sealant of the present invention is molded as a single piece, its structure is simpler and costs are reduced compared to the joint sealant made of two different parts as shown in the conventional example (FIG. 9).

[0022] In addition, according to the present invention, a retaining member is provided that connects the lower part of the first connecting part and the indoor side of the covering part, so that the angle of the second connecting part extending from the first connecting part and the covering part does not easily change even after the joint sealant is attached to the horizontal joint. Therefore, when the first connecting portion is pressed against the bottom frame of the sash, the covering portion can be reliably positioned in a parallel state at a certain distance from the outdoor side of the exterior wall panel to the outdoor side, thereby covering the exterior wall panel.

[0023] In addition, according to the present invention, the retaining member has a substantially L-shaped cross section, and when the first connecting portion is pressed against the bottom frame of the sash, the indoor side of the corner of the retaining member abuts against the outdoor side end of the main body portion, thereby making the angle of the second connecting portion and the cover portion extending from the first connecting portion stable and not easily changing even after the joint sealant is attached to the horizontal joint.

[0024] In addition, according to the present invention, a rubber sponge material, or butyl tape or double-sided tape is provided between the main body portion and the upper part of the exterior wall panel, thereby further improving the sealing performance between the main body portion and the upper part of the exterior wall panel. In particular, the upper surface of the exterior wall panel may be rougher than the lower surface of the sash bottom frame, and water may accumulate in between, so sealing with rubber sponge material, butyl tape, or double-sided tape can effectively prevent water from seeping in from the outdoors to the indoors.

[0025] In addition, according to the present invention, the exterior wall panels are provided on the indoor side and have their upper surfaces fixed to a frame of the same height, and the main body of the joint sealant is fixed to the frame in addition to the exterior wall panels via butyl tape or double-sided tape, thereby preventing water from entering the interior side between the joint sealant and the frame. [Brief description of the drawings]

[0026] [Figure 1] 1 is a perspective view showing a main part of a joint sealant according to an embodiment of the present invention. [Diagram 2] 2 is a front view showing the state in which the joint sealant shown in FIG. 1 is attached to a horizontal joint between a sash and an exterior wall panel. FIG. [Diagram 3] 3 is an enlarged cross-sectional view of line AA in FIG. 2 showing the joint structure when the exterior wall panel is in the correct position. [Figure 4]3 is an enlarged cross-sectional view of line AA in FIG. 2 showing the joint structure when the exterior wall panel is slightly lower than the normal position. [Diagram 5] 3 is an enlarged cross-sectional view taken along line AA in FIG. 2, showing a joint structure to which another joint sealant according to an embodiment of the present invention is attached. [Figure 6] 3 is an enlarged cross-sectional view taken along line AA in FIG. 2, showing a joint structure to which yet another joint sealant according to an embodiment of the present invention is attached. [Figure 7] FIG. 11 is a cross-sectional view showing a joint structure according to a conventional example. [Figure 8] 1 is a front view showing the relationship between a sash and glass window installed in an opening formed in an exterior wall of a house, and an exterior wall panel provided on the exterior wall. FIG. [Figure 9] FIG. 11 is a cross-sectional view showing another joint structure according to a conventional example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] 1 to 4, a joint sealant 30 according to an embodiment of the present invention and a joint structure to which the joint seal portion 30 is attached will be described. The same parts as those in the conventional example are given the same reference numerals.

[0028] The joint structure of an embodiment of the present invention is such that a dry joint sealant 30 as shown in Figure 1 is attached to a horizontal joint M formed between the bottom frame 4 of a sash 3 attached to an opening formed in an exterior wall 1 of a house and the upper parts of exterior wall panels 2A and 2B as shown in Figure 2. Here, the horizontal joint M formed between the upper parts of two exterior wall panels 2A, 2B arranged side by side on the left and right of the exterior wall 1 of the house and the bottom frame 4 of the sash 3 is sealed with a joint sealant 30, and the joint sealant 30 is attached so as to bridge the upper parts of the two exterior wall panels 2A, 2B from the left to the right. The "left and right" here refer to the left and right sides when the installed exterior wall panels 2A, 2B are viewed from the outdoors.

[0029] The joint sealant 30 has a main body portion 31 , two seal portions 32 and 33 , a support lip portion 34 , a first connecting portion 35 , a second connecting portion 36 , and a cover portion 37 .

[0030] The main body 31 is in the form of a band extending laterally, and when the joint sealant 30 is attached to the horizontal joint M, it is fixed to the upper parts of the two exterior wall panels 2A, 2B and extends in the left-right direction. As shown in FIG. 3, the main body 31 is fixed to the upper portions of the exterior wall panels 2A and 2B via butyl tape B. The two exterior wall panels 2A, 2B are provided on the indoor side thereof and have their upper surfaces fixed to a frame 40 of the same height, and the main body 31 is fixed to the two exterior wall panels 2A, 2B as well as to the frame 40 via butyl tape B. That is, approximately half of the main body 31 in cross section facing outdoors is fixed to the upper surfaces of the exterior wall panels 2A, 2B, and approximately the remaining half facing indoors is fixed to the upper surface of the frame 40 via butyl tape B.

[0031] The seal parts 32, 33 are attached to one end of the main body 31 (the end on the indoor side when the joint seal material 30 is attached to the horizontal joint M) and extend at an angle upward toward the other end (the end on the outdoor side when the joint seal material 30 is attached to the horizontal joint M), and consist of an indoor seal part 32, and an outdoor seal part 33, which is spaced apart from the seal part 32 toward the other end of the main body 31 and extends at an angle upward and toward the other end in parallel to the seal part 32. When the joint seal material 30 is attached to the horizontal joint M, as shown in FIG. 3, the tip side of the seal parts 32, 33 curves toward the outdoor side and the tip upper surface part elastically contacts the bottom frame 4 of the sash 3, preventing water from entering the indoor side from between the bottom frame 4 and the seal parts 32, 33 from the outdoor side.

[0032] The support lip portion 34 extends obliquely upward and toward the other end (outdoor side) of the main body portion 31 from a position on the other end side (outdoor side) of the main body portion 31 further than the base position of the seal portion 33 relative to the main body portion 31, and is flexible. Here, the support lip 34 extends parallel to the sealing portions 32,33. When the joint sealant 30 is attached to the horizontal joint M, the tip side of the support lip portion 34 is curved toward the exterior side, as shown in FIG.

[0033] The first connecting portion 35 extends obliquely upward from the end of the support lip portion 34 toward the other end side (outdoor side) of the main body portion 31, and a flat portion H is formed at its upper end. The first connecting portion 35 extends from the connection portion with the support lip portion 34 so as to be further inclined toward the other end side (outdoor side) of the main body portion 31. When the joint sealant 30 is attached to the horizontal joint M, the first connecting portion 35, as shown in Figure 3, rotates in a direction approaching the main body portion 31, with the connection portion with the first connecting portion 35 as the fulcrum P, centered on this fulcrum P, and at that time, the flat portion H comes into face-to-face contact with the bottom frame 4 of the sash 3 and is pressed against the bottom frame 4 from above.

[0034] The second connecting portion 36 extends from the upper end of the first connecting portion 35 in a direction parallel to the main body portion 31 and away from the other end of the main body portion 31 outward. When the joint sealant 30 is attached to the horizontal joint M, the second connecting portion 36, like the first connecting portion 35, rotates around the fulcrum P in a direction approaching the main body portion 31, as shown in Figure 3, and the tip of the second connecting portion 36 becomes the lower end extending toward the outdoors, and this lower end is located closer to the outdoors than the outdoor side faces of the exterior wall panels 2A, 2B and higher than the upper surfaces of the exterior wall panels 2A, 2B.

[0035] The cover portion 37 extends obliquely downward from the tip of the second connecting portion . When the joint sealant 30 is attached to the horizontal joint M, the covering portion 37, like the first connecting portion 35, rotates around the fulcrum P in a direction approaching the main body portion 31 as shown in Fig. 3, and extends vertically downward from the lower end of the second connecting portion 36, covering the exterior wall panels 2A, 2B from the outdoor side. At this time, the covering portion 37 is parallel to the outdoor side surfaces of the exterior wall panels 2A, 2B at a certain distance L from the outdoor side surfaces of the exterior wall panels 2A, 2B.

[0036] In addition, a retaining member 38 is provided to connect the lower part of the first connecting portion 35 and the indoor side surface of the covering portion 37, here the connection portion between the second connecting portion 36 and the covering portion 37. The retaining member 38 has a generally L-shaped cross section with a first retaining portion 38a and a second retaining portion 38b intersecting at a right angle, and a hollow portion is formed between the retaining member 38 and the second connecting portion 36. The retaining member 38 prevents the angle of the second connecting portion 36 and the cover portion 37 extending from the first connecting portion 35 from changing even after the joint sealant 30 is attached to the horizontal joint M. Furthermore, when the joint sealant 30 is attached to the horizontal joint M, the indoor side of the corner 38c of the retaining member 38 abuts against the outdoor end 31a of the main body 31. At this time, the first retaining portion 38a extends vertically up and down, and the second retaining portion 38b extends horizontally left and right. This further maintains the covering portion 37 parallel to the outdoor side surfaces of the exterior wall panels 2A, 2B at a constant distance L from the outdoor side surfaces of the exterior wall panels 2A, 2B.

[0037] Before the joint sealant 30 is attached to the horizontal joint M, that is, when the first connecting portion 35 of the joint sealant 30 is not pressed against the bottom frame 4 of the sash 3, as shown in FIG. 1, the connection portion between the support lip portion 34 and the first connecting portion 35 serves as a fulcrum P, and the first connecting portion 35, the second connecting portion 36 and the covering portion 37 are located above and away from the main body portion 31. However, when the joint sealant 30 is attached to the horizontal joint M and the first connecting portion 35 is pressed against the bottom frame 4 of the sash 3, as shown in FIG. 3, the support lip portion 34 bends so as to tilt toward the outdoors, and the first connecting portion 35, the second connecting portion 36 and the covering portion 37 rotate around the fulcrum P in a direction approaching the main body portion 31, so that the flat portion H is pressed against the bottom frame 4 of the sash 3, and the covering portion 37 becomes parallel to the outdoors sides of the exterior wall panels 2A, 2B at a certain distance L, thereby covering the exterior wall panels 2A, 2B.

[0038] Fig. 3 shows a case where the exterior wall panel 2A is in the correct position relative to the exterior wall 1, and the joint width Sa is also correct, but as shown in Fig. 4, even if the exterior wall panel 2A is slightly lower than the correct position due to variations during construction and the joint width Sb becomes slightly wider, the variation can be absorbed by the sealing parts 32, 33 and the support lip part 34 of the joint sealant 30 bending toward the outside. As a result, even if the joint width Sa becomes wider than the joint width Sb, the flat part H formed in the first connecting part 35 is pressed against the bottom frame 4 of the sash 3 in the same way, so that the distance T from the bottom frame 4 of the sash 3 to the lower end of the covering part 37 is the same whether the joint width Sa is Sa or Sb.

[0039] Therefore, even if the heights of the upper surfaces of the two exterior wall panels 2A, 2B arranged side by side are not uniform due to variation and a step occurs, the upper surfaces of the exterior wall panels 2A, 2B are covered from the outdoor side by the covering portion 37 of the joint sealant 30. Moreover, even if the upper surfaces of the two exterior wall panels 2A, 2B are at different heights, the lower end of the covering portion 37 appears as a line extending horizontally from left to right, so that it looks good when viewed from the outdoors.

[0040] In this embodiment, the joint sealant 30 is attached to the horizontal joint M between the bottom frame 4 of the sash 3 and the two exterior wall panels 2A, 2B provided below it, so that even if there is a variation in height between the two exterior wall panels 2A, 2B, it is covered from the outdoor side by the covering portion 37. However, the present invention can also be applied to a joint sealant that is simply attached to the horizontal joint M between the bottom frame 4 of the sash 3 and the exterior wall panel 2 (which may be a single panel) provided below it. According to this, the height of the joint sealant 30 visible from the outdoors, i.e., the distance T from the bottom frame 4 of the sash 3 to the bottom end of the cover portion 37, is always the same, so that it can be set to a preset height, which provides a good appearance.

[0041] Furthermore, the joint sealant 30 is made of rubber (or may be made of resin) and is a single, integrally molded member, so that the structure is simple and costs can be kept down.

[0042] In addition, the joint sealant 30 is sealed to the bottom frame 4 of the sash 3 by the sealing portions 32, 33 bending and elastically contacting the bottom frame 4, and is sealed to the exterior wall panels 2A, 2B by the butyl tape B provided on the underside of the main body portion 31, thereby preventing water from entering the inside of the room from the outside. In particular, the upper surfaces of the exterior wall panels 2A, 2B may be rougher than the lower surface of the bottom frame 4 of the sash 3, but have excellent waterproofing properties because they are sealed with the butyl tape B. If the upper surfaces of the exterior wall panels 2A, 2B are not particularly rough, it is also possible to directly attach the main body 31 of the joint sealant 30 without using the butyl tape B.

[0043] In addition, the butyl tape B is attached to the upper surface of the frame 40 in addition to the upper surfaces of the exterior wall panels 2A, 2B, but it may be attached only to the upper surfaces of the exterior wall panels 2A, 2B. Note that instead of the butyl tape B, a rubber sponge material or double-sided tape can also be used for sealing.

[0044] In addition, in this embodiment, the retaining member 38 has a generally L-shaped cross section to form a hollow section between it and the second connecting portion 36, but it may also be a solid section as shown in FIG. 5, or, as shown in FIG. 6, the retaining member 38 may be omitted if the rigidity of the second connecting portion 36 and the cover portion 37 is high enough to maintain the angle between the second connecting portion 36 and the cover portion 37. In addition, the joint sealant 30 has two sealing portions 32, 33, but the shape and number are not particularly limited as long as they elastically contact the bottom frame 4 of the sash 3 to prevent water from entering the interior side. [Explanation of symbols]

[0045] 1. Exterior wall 2. Exterior wall panels 2a Edge 2A Exterior wall panel (left side) 2B Exterior wall panel (right side) 3 Sash 4 Bottom frame 10 Joint sealant 11 Sealing material body 12 Filling material 13 Fin section 14 Projecting piece 15 Elastic adhesive material 20 Joint sealant 21 Sealing material 21a Notched groove 21b,21c protrusions 22 Mounting frame 22a Mounting part 22b Draining section 23 Bis 30 Joint sealant 31 Main body 31a: other end (outdoor side) of the main body 32,33 Seal part 34 Support lip 35 1st connection part 36 2nd connection part 37 Cover 38 Retaining member 38a 1st holding part 38b 2nd holding part 38c Corner 40 Frame Border B Butyl tape H flat part L distance M horizontal joint P fulcrum Sa joint width Sb joint width T Distance (height)

Claims

1. A dry joint sealant that is attached to a horizontal joint formed between an upper part of an exterior wall panel installed on the exterior wall of a house and a bottom frame of a sash, A body portion fixed to an upper portion of the exterior wall panel and extending laterally; A seal portion extending upward from the main body portion and elastically contacting a bottom frame of the sash; a support lip portion that extends obliquely upward and toward the outdoors from a position on the outdoors side relative to a base position of the seal portion relative to the main body portion and has flexibility; a first connecting portion that extends obliquely upward and toward the exterior from an end of the support lip portion and has a flat portion formed at its upper end, the flat portion being pressed against a bottom frame of the sash; a second connecting portion extending obliquely from an upper end of the first connecting portion toward the exterior side and having a lower end located toward the exterior side of the exterior wall panel; The second connecting portion is hung downward from a lower end of the second connecting portion, and the covering portion covers the exterior wall panel from the outdoor side. When the first connecting portion is not pressed against the bottom frame of the sash, the first connecting portion, the second connecting portion and the covering portion are positioned above and away from the main body portion, with the connection portion between the support lip portion and the first connecting portion as a fulcrum; however, when the first connecting portion is pressed against the bottom frame of the sash, the support lip portion bends so as to tilt toward the outdoors, and the first connecting portion, the second connecting portion and the covering portion rotate around the fulcrum in a direction approaching the main body portion, so that the flat portion is pressed against the bottom frame of the sash, and the covering portion becomes parallel to the exterior side of the exterior wall panel at a certain distance from the exterior side of the exterior wall panel, thereby covering the exterior wall panel.

2. The joint sealant according to claim 1 , further comprising a retaining member connecting a lower portion of the first connecting portion and an indoor side surface of the cover portion.

3. The joint sealant described in claim 2, characterized in that the retaining member has an approximately L-shaped cross section, and when the first connecting portion is pressed against the bottom frame of the sash, the indoor side of the corner of the retaining member abuts against the outdoor side end of the main body portion.

4. 4. The joint sealant according to claim 1, further comprising a rubber sponge material provided between the main body and an upper portion of the exterior wall panel.

5. 5. The joint sealant according to claim 1, wherein the main body is fixed to the upper portion of the exterior wall panel via a butyl tape or a double-sided tape.

6. A joint structure in which a dry joint sealant is attached to a horizontal joint formed between the upper part of two exterior wall panels arranged side by side on the exterior wall of a house and a lower frame of a sash so as to bridge the two exterior wall panels, thereby sealing the horizontal joint, The joint sealant is a body portion fixed to the upper portion of the two exterior wall panels and extending laterally; A seal portion extending upward from the main body portion and elastically contacting a bottom frame of the sash; a support lip portion that extends obliquely upward and toward the outdoors from a position on the outdoors side relative to a base position of the seal portion relative to the main body portion and has flexibility; a first connecting portion that extends obliquely upward and toward the exterior from an end of the support lip portion and has a flat portion formed at its upper end, the flat portion being pressed against a bottom frame of the sash; a second connecting portion extending obliquely from an upper end of the first connecting portion toward the exterior side and having a lower end located toward the exterior side of the exterior wall panel; The second connecting portion is hung downward from a lower end of the second connecting portion, and the covering portion covers the exterior wall panel from the outdoor side. When the first connecting portion is not pressed against the bottom frame of the sash, the first connecting portion, the second connecting portion and the covering portion are located above and away from the main body portion, with the connection portion between the support lip portion and the first connecting portion as a fulcrum. However, when the first connecting portion is pressed against the bottom frame of the sash, the support lip portion bends so as to tilt toward the outdoors, and the first connecting portion, the second connecting portion and the covering portion rotate around the fulcrum in a direction approaching the main body portion, so that the flat portion is pressed against the bottom frame of the sash, and the covering portion becomes parallel to the outdoors side of the exterior wall panel at a certain distance from the exterior side of the exterior wall panel, thereby covering the exterior wall panel.

7. The two exterior wall panels are provided on the indoor side and have upper surfaces fixed to a frame having the same height, The joint structure according to claim 6, characterized in that the main body of the joint sealant is fixed to the frame in addition to the two exterior wall panels via butyl tape or double-sided tape.

Images