Waterproof structure of external wall joint

Abstract

To drain stably even when some variance is present, and to reduce the number of components.SOLUTION: A waterproof structure of an external wall joint has: a box-shaped first drainage member 20 fitted to a corner of a lower left external wall panel 3; and a box-shaped second drainage member 40 fitted to a corner of a lower right external wall panel 4. A first inclined water conveyance part 21 which is inclined downwardly toward a longitudinal joint 6 side is provided above the first drainage member 20. A water conveyance lip part 22 which is lowered from the indoor side to the outdoor side while extending to the second drainage member 40 side is provided at a lower end of the first inclined water conveyance part 21. A second inclined water conveyance part 41 which is inclined downwardly toward the longitudinal joint 6 side is provided above the second drainage member 40. A water conveyance recess part 42 which is lowered from the indoor side to the outdoor side while projecting toward the first drainage member 20 side is provided at a lower part of a left side face 40d of the longitudinal joint 6 side of the second drainage member 40. A tip of the water conveyance lip part 22 is situated at the second drainage member 40 side than a left end of the first drainage member 20 side of the water conveyance recess part 42 when viewed from the upward and indoor side.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a waterproof structure for exterior wall joints that prevents water from entering the interior of a building through the joints between exterior wall panels. [Background technology]

[0002] In the past, in order to prevent rainwater and other contaminants from seeping inside the building through the joints between exterior wall panels of houses and other buildings, sealant was filled in between the joints, and a waterproof lip was installed as a backup for the sealant. However, if the sealing at the joints were to break due to deterioration over time or other reasons, water would seep inside the building, so it is known that a horizontal joint drainage member is installed on the inside of the exterior wall panel as a tertiary waterproofing material (Patent Documents 1 and 2).

[0003] The horizontal joint drainage member described in Patent Document 1 has a fin-shaped cross section with a long lip piece extending upward in the horizontal direction (horizontal direction) to cover the bottom of the horizontal joint from the indoor side, and is positioned so that it extends along the horizontal joint and its ends slightly protrude into the vertical joint.

[0004] Furthermore, in order to make the horizontal joint drainage member described in Patent Document 2 applicable to thin exterior wall panels 1 to 4 that shorten the depth of exterior wall joints 5 and 6, box-shaped horizontal joint drainage members 7 and 8 are provided at the upper corners of the lower exterior wall panels 3 and 4 of the exterior wall panels 1 to 4 that are arranged side by side vertically and horizontally, as shown in Figures 14 to 16. Sealing material 9 and secondary waterproofing member 10 are provided on the exterior side of the horizontal joints 5 and vertical joints 6 between the exterior wall panels 1 to 4. If some malfunction occurs in these and water W passes through the sealing material 9 and secondary waterproofing member 10 of the horizontal joints, the horizontal joint drainage members 7 and 8 receive the water W that has passed through and drain it horizontally, and then the drainage sections 7a and 8a provided on the vertical joint 6 side allow it to flow to the exterior side of the vertical joint 6 and be discharged downward. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-166490 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-188497 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the horizontal joint drainage members 7 and 8 described in Patent Document 2 are both provided on one and the other of the lower exterior wall panels 3 and 4, respectively, and are configured to guide water W that has accumulated on the vertical joint 6 side, so that the water W is discharged to the vertical joint 6 side from two positions on the left and right in the horizontal direction. Therefore, if there is variation in the joint width of the vertical joint 6 or the installation position of the horizontal joint drainage members 7, 8, it may not be possible to target the position for discharging water W toward the vertical joint 6, and stable discharge may not be possible.

[0007] Furthermore, in the case of the horizontal joint drainage member described in Patent Document 1, there is a risk that water guided to the vertical joint 6 side may be scattered indoors. Furthermore, in the case of the horizontal joint drainage members 7 and 8 described in Patent Document 2, the received water W is channeled to the outdoor side of the vertical joint 6, so the water W does not splash indoors, but in order to channel the water W to the outdoor side of the vertical joint 6, it is necessary to provide curved members 11 that extend to the left and right on the secondary waterproofing member 10 provided on the indoor side of the vertical joint sealing material 9. Furthermore, it is necessary to provide a backup material 12 to prevent the secondary waterproofing member 10 of the vertical joint 6 from seeping into the indoor side, and a backup material backing plate 13 to prevent the backup material 12 from seeingp into the indoor side, which increases the number of parts.

[0008] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a waterproof structure for exterior wall joints that can stably drain water even if there is some variation, and that has a reduced number of parts. [Means for solving the problem]

[0009] In order to achieve the above object, the waterproof structure of the exterior wall joint of the present invention is a waterproof structure of the exterior wall joint that prevents water from entering the interior of the building through horizontal joints (5) and vertical joints (6) between a plurality of exterior wall panels (1 to 4) arranged side by side in the vertical and horizontal directions, as shown in Figures 10 and 11, or Figures 12 and 13, a box-shaped first drainage member (51, 55) having a vertical height and a width both indoors and outdoors, attached to the upper indoor side corner of one (3) of the lower left exterior wall panel (3) or the lower right exterior wall panel (4) and on the vertical joint (6) side; a box-shaped second drainage member (53, 57) having a vertical height and a width both indoors and outdoors, attached to the upper indoor side corner of the other of the lower left exterior wall panel (3) or the lower right exterior wall panel (4) and on the vertical joint (6) side; A first inclined water guide portion (21) that slopes downward toward the vertical joint (6) is provided at the upper portion of the first drainage member (51, 55), and a first water guide lip portion (52, 56) that extends toward the second drainage member (53, 57) and slopes downward from the indoor side to the outdoor side is provided on the right side surface (20d) of the first drainage member (51, 55) that faces the vertical joint (6), A second inclined water guide portion (21') that slopes downward toward the vertical joint (6) is provided at the upper portion of the second drainage member (53, 57), and a second water guide lip portion (54, 58) that extends toward the first drainage member (51, 55) and slopes downward from the indoor side to the outdoor side is provided on the left side surface (40d) of the second drainage member (53, 57) that faces the vertical joint (6), The first water guide lip portion (52, 56) and the second water guide lip portion (54, 58) are symmetrical and have their tips in contact with each other.

[0010] The waterproof structure of the exterior wall joint of the present invention is a waterproof structure of the exterior wall joint that prevents water from entering the interior of the building through horizontal joints (5) and vertical joints (6) between a plurality of exterior wall panels (1 to 4) arranged side by side in the vertical and horizontal directions, as shown in Figures 1 to 9, a box-shaped first drainage member (20, 120) having a vertical height and a width both indoors and outdoors, attached to the upper indoor side corner of one of the lower left exterior wall panel (3) or the lower right exterior wall panel (4) and on the vertical joint (6) side; a box-shaped second drainage member (40, 140) having a vertical height and a width both indoors and outdoors, attached to the upper indoor side corner of the other of the lower left exterior wall panel (3) or the lower right exterior wall panel (4) and on the vertical joint (6) side, a first inclined water conveying section (21, 121) inclined downward toward the vertical joint (6) is provided at an upper portion of the first drainage member (20, 120), and a water conveying lip section (22, 122) extending toward the second drainage member (40, 140) and descending from the indoor side to the outdoor side is provided at a lower end of the first inclined water conveying section (21, 121); A second inclined water conveying section (41, 141) that is inclined downward toward the vertical joint (6) side is provided at the upper part of the second drainage member (40, 140), and a water conveying recess (42, 142) that protrudes toward the first drainage member (20, 120) and descends from the indoor side to the outdoor side is provided at the lower part of the left side surface (40d, 140d) of the second drainage member (40, 140) on the vertical joint (6) side, When viewed from above, the tip of the water-conducting lip portion (22, 122) is located closer to the second drainage member (40, 140) than the left end of the water-conducting recess (42, 142) on the first drainage member (20, 120) side.

[0011] The present invention is also characterized in that the water guide lip portion (22, 122) and the water guide recess portion (42, 142) are not in contact with each other.

[0012] The present invention is also characterized in that a tip tongue portion (42c, 142) sloping downward toward the outdoor side is provided at the lower end of the outdoor side end of the water-conducting recess (42, 142c), and the tip tongue portion (42c, 142c) protrudes further toward the outdoor side than the outdoor side surface of the second drainage member (40, 140) and elastically contacts the indoor side surface of the indoor side sealing lip (62a) of the vertical joint sealing backup material (62) provided in the vertical joint (6).

[0013] The present invention is also characterized in that the water guide lip portion (22, 122) is inclined downward from the base side to the tip side, and the inclination is greater than that of the first inclined water guide portion (21, 121).

[0014] The present invention is also characterized in that the first inclined water conveying section (21, 121) also slopes downward from the indoor side toward the outdoor side, and the second inclined water conveying section (41, 141) also slopes downward from the outdoor side toward the indoor side.

[0015] The present invention is also characterized in that a first outer protrusion (23, 123) higher than the first inclined water guide portion (21, 121) is provided on the outer wall panel (3) side of the first drainage member (20, 51, 55, 120), and the first outer protrusion (23, 123) is inclined toward the center of the first drainage member (20, 51, 55, 120) so that the center of the first drainage member (20, 51, 55, 120) has its lowest point, and a second outer protrusion (43, 143) higher than the second inclined water guide portion (41, 21', 141) is provided on the outer wall panel (4) side of the second drainage member (40, 53, 57, 140), and the second outer protrusion (43, 143) is inclined toward the center of the second drainage member (40, 53, 57, 140) so that the center of the second drainage member (40, 53, 57, 140) has its lowest point.

[0016] The present invention also provides a first horizontal joint water guide member (81) having an attachment portion (81a) attached to an upper indoor side portion of the exterior wall panel (3) to which the first drainage member (20, 51, 55, 120) is attached and above the first drainage member (20, 51, 55, 120), and an inclined lip (81b) extending from the attachment portion (81a) to above the bottom surface of the horizontal joint (5) at an incline toward the indoor side and extending to at least the full width of the exterior wall panel (3) to which the first drainage member (20, 51, 55, 120) is attached; The second horizontal joint water guide member (91) is characterized by comprising: an attachment portion (91a) that is attached to the upper indoor side of the exterior wall panel (4) to which the second drainage member (40, 53, 57, 140) is attached and above the second drainage member (40, 53, 57, 140); and a second horizontal joint water guide member (91) that extends from the attachment portion (91a) at an angle toward the indoor side above the bottom surface of the horizontal joint (5) and extends at least to the full width of the exterior wall panel (4) to which the second drainage member (40, 53, 57, 140) is attached.

[0017] It should be noted that symbols in parentheses indicate corresponding elements or matters described in the drawings and in the detailed description to be described later. [Effects of the Invention]

[0018] According to the present invention, water that falls along the outdoor side of the upper exterior wall panel and attempts to seep inside through the horizontal joints between the exterior wall panels is blocked by the sealing material provided in the horizontal joints, but water may seep inside through the horizontal joints due to deterioration over time, etc., and the seeping water is received by the first drainage member and second drainage member attached to the lower exterior wall panel and guided to the first water-conducting lip portion and second water-conducting lip portion. The first and second water-conducting lips descend from the indoor side to the outdoor side, and are symmetrical with their tips touching each other, so that water guided into the first and second water-conducting lips flows toward the vertical joint and is discharged downward.

[0019] In this case, if the first water-conducting lip portion and the second water-conducting lip portion descend toward their tips, the water discharge path will be a single point near the tips of the first water-conducting lip portion and the second water-conducting lip portion that are in contact with each other, making it easy to discharge water from a predetermined target position. Conversely, if the first and second water-conducting lips rise as they approach the tips, the water will be discharged from two locations: the base of the first water-conducting lip and the base of the second water-conducting lip, which are in contact with each other, but these are quite close to each other and are in elastic contact (or close to) with the indoor side of the indoor-side sealing lip of the vertical joint sealing backup material, making it easier to discharge water from a pre-targeted location compared to conventional examples (Figures 14 to 16). Moreover, there is no need to increase the number of parts as in the conventional example (FIGS. 14 to 16), and the structure is simple. Also, although the first drainage member and the second drainage member are symmetrical, they are not identical in shape, and for example, the direction of the slope is opposite. Therefore, if the slope is reversed when installed, water will be drained from the indoor side to the outdoor side, so care must be taken.

[0020] Furthermore, according to the present invention, the first drainage member has a water-conducting lip, and the second drainage member has a water-conducting recess, and when viewed from above, the tip of the water-conducting lip is located closer to the second drainage member than the side edge of the water-conducting recess on the first drainage member side, so that when water flows down along the indoor side of the exterior wall panel to which the first drainage member is attached, the water is guided by the water-conducting lip and flows from the indoor side to the outdoor side and falls into the water-conducting recess. Conversely, when water flows down along the indoor side of the exterior wall panel to which the second drainage member is attached, the water is guided to the water-conducting recess. In this way, all water flowing down along the exterior wall panels is guided into the water-conducting recesses and discharged downward from the indoor side of the vertical joints, so the water has only one discharge route from the water-conducting recesses, making it easy to discharge water from a pre-targeted location. In this case, there is also no need to increase the number of parts as in the conventional example (FIGS. 14 to 16).

[0021] In addition, according to the present invention, when viewed from above, the tip of the water-conducting lip portion of the first drainage member is positioned closer to the second drainage member than the left end of the water-conducting recess on the first drainage member side, so that even if there is some variation in the installation positions of the first drainage member and the second drainage member or between exterior wall panels, water can be reliably drained from a single targeted position in a stable manner.

[0022] Furthermore, according to the present invention, since the water guide lip portion and the water guide recess portion are not in contact with each other, variations in the installation of the first drainage member and the second drainage member can be absorbed.

[0023] Furthermore, according to the present invention, a tip tongue portion that slopes downward toward the outdoor side is provided at the lower end of the outdoor side end of the water-conducting recess, and the tip tongue portion protrudes further toward the outdoor side than the outdoor side surface of the second drainage member and elastically contacts the indoor side surface of the indoor side sealing lip of the vertical joint sealing backup material provided in the vertical joint, so that water can be discharged downward along the indoor side of the joint water-stopping lip, thereby reducing splashing of water when it is discharged.

[0024] Furthermore, according to the present invention, the water guide lip portion is inclined downward from the base side to the tip side, and this inclination is greater than that of the first inclined water guide portion, so that water can be easily discharged.

[0025] Furthermore, according to the present invention, the first inclined water conveying section also slopes downward from the indoor side toward the outdoor side, and the second inclined water conveying section also slopes downward from the outdoor side toward the indoor side, making it easy to collect water.

[0026] Furthermore, according to the present invention, a first outer protrusion higher than the first inclined water guide portion is provided on the outer wall panel side of the first drainage member, and the first outer protrusion is inclined toward the center of the first drainage member so that its lowest point is the center of the first drainage member, and a second outer protrusion higher than the second inclined water guide portion is provided on the outer wall panel side of the second drainage member, and the second outer protrusion is inclined toward the center of the second drainage member so that its lowest point is the center of the second drainage member, making it easier to collect water.

[0027] Furthermore, according to the present invention, a first horizontal joint water-guiding member having an inclined lip extending to at least the full width of the exterior wall panel is attached to the upper indoor side of the exterior wall panel to which the first drainage member is attached and above the first drainage member, and a second horizontal joint water-guiding member having an inclined lip extending to at least the full width of the exterior wall panel is attached to the upper indoor side of the exterior wall panel to which the second drainage member is attached and above the second drainage member, thereby making it possible to prevent water from entering the interior side beyond the horizontal joint. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a perspective view showing the appearance of a waterproof structure for an exterior wall joint according to a first embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged perspective view showing a main part of the waterproof structure of the exterior wall joint of FIG. 1. [Figure 3] FIG. 2 is an enlarged perspective view showing a first drainage member of FIG. 1. [Figure 4] FIG. 2 is an enlarged perspective view showing a second drainage member of FIG. 1. [Figure 5] FIG. 2 is an enlarged cross-sectional view taken along line XX in FIG. [Figure 6] FIG. 2 is an enlarged cross-sectional view taken along line YY in FIG. [Figure 7] FIG. 2 is an enlarged cross-sectional view taken along line ZZ in FIG. [Figure 8] FIG. 2 is an enlarged front view showing a main part of the waterproof structure of the exterior wall joint of FIG. [Figure 9] 5 is an enlarged perspective view showing the configuration of the water-guiding recess when the second drainage member shown in FIG. 4 is installed on an exterior wall panel. FIG. [Figure 10] FIG. 10 is an enlarged perspective view showing a first drainage member of the waterproof structure for an exterior wall joint according to a second embodiment of the present invention. [Figure 11] FIG. 4 is an enlarged front view showing a main part of a waterproof structure for an exterior wall joint according to a second embodiment of the present invention. [Figure 12] FIG. 10 is an enlarged perspective view showing a first drainage member of a waterproof structure for an exterior wall joint according to a third embodiment of the present invention. [Figure 13]FIG. 10 is an enlarged front view showing a main part of a waterproof structure for an exterior wall joint according to a third embodiment of the present invention. [Figure 14] FIG. 10 is a cross-sectional view showing a waterproof structure for an exterior wall joint according to a conventional example. [Figure 15] FIG. 10 is a front view showing a waterproof structure for an exterior wall joint according to a conventional example. [Figure 16] FIG. 15 is an enlarged perspective view showing the horizontal joint drainage member shown in FIG. [Figure 17] FIG. 10 is an enlarged perspective view showing a first drainage member of a waterproof structure for an exterior wall joint according to a fourth embodiment of the present invention. [Figure 18] FIG. 10 is an enlarged perspective view showing a second drainage member of the waterproof structure for an exterior wall joint according to a fourth embodiment of the present invention. [Figure 19] This is a side view of the positional relationship of the first drainage member and the second drainage member installed on an exterior wall panel in the fourth embodiment of the present invention, as viewed from the indoor side. [Figure 20] FIG. 20 is an enlarged cross-sectional view taken along the line EE in FIG. 19. [Figure 21] This is an oblique view of the positional relationship of a first drainage member and a second drainage member installed on an exterior wall panel in accordance with a fourth embodiment of the present invention, as viewed from the outdoors side. [Figure 22] FIG. 10 is an enlarged plan view showing a state in which a first drainage member according to a fourth embodiment of the present invention is installed on an exterior wall panel. [Figure 23] FIG. 10 is an enlarged plan view showing a second drainage member according to a fourth embodiment of the present invention installed on an exterior wall panel. DETAILED DESCRIPTION OF THE INVENTION

[0029] (First embodiment) A waterproof structure for an exterior wall joint according to a first embodiment of the present invention will be described with reference to Figures 1 to 9. The same parts as in the conventional example are designated by the same reference numerals. The waterproof structure for exterior wall joints according to the first embodiment of the present invention prevents water from entering the interior of the building through horizontal joints 5 and vertical joints 6 formed between a plurality of exterior wall panels 1 to 4 arranged side by side vertically and horizontally, as shown in Figures 1 and 2. Here, "left and right" refer to the left and right sides when the installed exterior wall panels 1 to 4 are viewed from the interior side.

[0030] At the upper corner on the indoor side of the lower left exterior wall panel 3 and on the vertical joint 6 side, a box-shaped first drainage member 20 having a vertical height and width both indoors and outdoors, as shown in Figure 3, is attached to the indoor side (back side) of the exterior wall panel 3 with butyl tape B. In addition, at the upper corner on the indoor side of the exterior wall panel 4 at the lower right, on the side of the vertical joint 6, a box-shaped second drainage member 40 having a height and width both indoors and outdoors, as shown in Figure 4, is attached to the indoor side (back side) of the exterior wall panel 4 with butyl tape B.

[0031] The first drainage member 20 and the second drainage member 40 are installed facing each other across the vertical joint 6, but they have asymmetric shapes. The first drainage member 20 and the second drainage member 40 are made of resin or rubber and are produced by molding or the like.

[0032] As shown in Figure 3, when the first drainage member 20 is attached to the exterior wall panel 3, it is box-shaped and consists of a front surface 20a that faces indoors, a rear surface 20b that faces outdoors (towards the exterior wall panel 3), a left side surface 20c (the side farther from the vertical joint 6) that connects the front surface 20a and the rear surface 20b, a right side surface 20d (the side closer to the vertical joint 6), and a bottom surface 20e (the bottom surface 20e can be omitted), and a first inclined water guide section 21 is provided at the top.

[0033] The first inclined water conveying section 21 is inclined downward from the left side to the right side, that is, toward the vertical joint 6 side, and is also inclined downward from the indoor side to the outdoor side. A water guide lip portion 22 is provided at the lower end (right end) of the first inclined water guide portion 21, extending while inclining downward toward the second drainage member 40 and descending from the indoor side to the outdoor side. The thickness of the water-conducting lip portion 22 tapers from the base to the tip, and its width (width in the indoor / outdoor direction) is the same as that of the first inclined water-conducting portion 21, but the water-conducting lip portion 22 may protrude outdoors beyond the rear surface 20b as shown in Figure 3 so as to be in elastic contact with (or close to) the indoor side of the indoor-side sealing lip 62a of the vertical joint sealing backup material 62.

[0034] In addition, a first outer protrusion 23 that is higher than the upper surface of the first inclined water guide section 21 is provided on the upper part of the rear surface 20b of the first drainage member 20, which faces the exterior wall panel 3. The first outer protrusion 23 is V-shaped and inclined from the left and right toward the center of the first drainage member 20, with the center of the first drainage member 20 being its lowest point. In addition, the front surface 20a and left side surface 20c of the first drainage member 20 are also set higher than the upper surface of the first inclined water conveying section 21, and the first outer protrusion 23, the front surface 20a and the left side surface 20c form a dam relative to the first inclined water conveying section 21.

[0035] In addition, a positioning portion 24 that protrudes downward from the bottom surface 20e is provided on the right side surface 20d of the first drainage member 20, which is the surface on the vertical joint 6 side, and a fixing portion 25 that protrudes further to the left is provided at the bottom of the left side surface 20c of the first drainage member 20. These positioning portions 24 and fixing portions 25 are used when attaching the first drainage member 20 to the exterior wall panel 3, as will be described later.

[0036] Next, as shown in Figure 4, when the second drainage member 40 is attached to the exterior wall panel 4, it is box-shaped and consists of a front surface 40a that faces indoors, a rear surface 40b that faces outdoors (towards the exterior wall panel 4), a right side surface 40c (the side farther from the vertical joint 6) that connects the front surface 40a and the rear surface 40b, a left side surface 40d (the side closer to the vertical joint 6), and a bottom surface 40e (the bottom surface 40e can be omitted), and a second inclined water-conducting section 41 is provided at the top.

[0037] The second inclined water conveying section 41 slopes downward from the right side to the left side, i.e., toward the vertical joint 6 side, and also slopes downward from the outdoor side toward the indoor side, in the opposite direction to the first inclined water conveying section 21. In line with the slope of this second inclined water conveying section 41, the left side surface 40d of the second drainage member 40 also has a triangular shape with its upper part cut toward the indoor side. A water guide recess 42 is provided at the bottom of the left side surface 40d of the second drainage member 40, protruding toward the first drainage member 20 side and descending from the indoor side to the outdoor side. The water-conducting recess 42 includes an upright wall 42a that extends from the lower portion of the front surface 40a of the second drainage member 40 to the left, then bends at a right angle and extends outdoors, i.e., in an L-shape. The outdoor water-conducting section 42b connects the lower end of the upright wall 42a to the left side of a positioning section 44 that protrudes below the left side surface 40d (described below). This outdoor water-conducting section 42b slopes downward from the indoor side to the outdoor side. The outdoor water-conducting section 42b is located lower than the bottom surface 40e of the second drainage member 40. The outdoor-side end of the outdoor water-conducting section 42b is further provided with a tip tongue 42c that protrudes outdoors and slopes downward toward the outdoors. The tip tongue 42c is tapered and pointed, protruding outdoors further than the rear surface 40b of the second drainage member 40.

[0038] In addition, a second outer protrusion 43 that is higher than the upper surface of the second inclined water guide section 41 is provided on the upper part of the rear surface 40b of the second drainage member 40, which faces the exterior wall panel 4. The second outer protrusion 43 is V-shaped and inclined from the left and right toward the center of the second drainage member 40, with the center of the second drainage member 40 being its lowest point. In addition, the front surface 40a and right side surface 40c of the second drainage member 40 are also set higher than the upper surface of the second inclined water conduit section 41, and the second outer protrusion section 43, the front surface 40a and the right side surface 40c form a dam relative to the second inclined water conduit section 41.

[0039] In addition, a positioning portion 44 that protrudes downward from the bottom surface 40e is provided on the left side surface 40d of the second drainage member 40, which is the surface on the vertical joint 6 side, and a fixing portion 45 that protrudes further to the right is provided on the lower part of the right side surface 40c of the second drainage member 40. As will be described later, these positioning portions 44 and fixing portions 45 are used when attaching the second drainage member 40 to the exterior wall panel 4. Furthermore, as shown in Figures 4 and 9, an extended surface 40d' that protrudes further outdoors than the rear surface 20b may be provided. This extended surface 40d' is configured to cover the left end surface of the butyl tape B attached to the rear surface 20b, so that water W2' dropping from the opening end 91c does not come into contact with the left end surface of the butyl tape B.

[0040] Here, the width of the first drainage member 20 and the second drainage member 40 is the same, and is approximately 1 / 5 of the width of the exterior wall panels 3 and 4. The longer the width of the first drainage member 20 and the second drainage member 40, Although it is possible to collect the falling water W, it is preferable that the width be less than half the width of the exterior wall panels 3, 4, considering that a first drainage member 20 and a second drainage member 40 are provided on the left and right sides of the indoor side of one exterior wall panel.

[0041] As shown in Figure 5, the vertical joint 6 between the left and right exterior wall panels 1, 2 (3, 4) is filled with vertical joint sealant 61 on the outdoor side, and a resin or rubber vertical joint sealing backup material 62 is pressed into the indoor side as a secondary waterproofing material.

[0042] As shown in Figure 6, the horizontal joints 5 between the upper and lower exterior wall panels 1 and 3 are filled with horizontal joint sealant 71 on the exterior side, similar to the vertical joints 6, and a resin or rubber horizontal joint sealing backup material 72 is pressed into the interior side as a secondary waterproofing material. Further indoors of the horizontal joint sealing backup material 72, a first horizontal joint water guide member 81 is attached as a tertiary water stop material. The first horizontal joint water guide member 81 is made of resin or rubber and has an attachment portion 81a and an inclined lip 81b. The attachment portion 81a is attached with butyl tape B to the upper indoor side of the lower-left exterior wall panel 3 to which the first drainage member 20 is attached, and above the first drainage member 20, as shown in Figures 6 and 2. The inclined lip 81b extends inclined indoors from the attachment portion 81a above the bottom surface of the horizontal joint 5 and extends at least the full width of the exterior wall panel 3. The inclined lip 81b and the attachment portion 81a have their ends cut off to terminate just before the vertical joint 6, leaving an open end 81c.

[0043] Similarly, in the horizontal joint 5 between the upper and lower exterior wall panels 2 and 4, similar to that shown in Figure 6, horizontal joint sealant 71 is filled on the outdoor side, and horizontal joint sealing backup material 72 made of resin or rubber is pressed into the indoor side as a secondary waterproofing material. Further indoors of the horizontal joint sealing backup material 72, a second horizontal joint water guide member 91, which is made of resin or rubber and has an attachment portion 91a and an inclined lip 91b, is attached as a tertiary water-stopping material. The attachment portion 91a is attached with butyl tape B to the upper indoor-side portion of the lower-right exterior wall panel 4 to which the second drainage member 40 is attached, above the second drainage member 40, as shown in Figures 6 and 2. The inclined lip 91b extends from the attachment portion 91a inclined indoors upward above the bottom surface of the horizontal joint 5 and extends at least the full width of the exterior wall panel 4. The inclined lip 91b and the attachment portion 91a have their ends cut off to terminate just before the vertical joint 6, leaving an open end 91c.

[0044] In addition, during the construction period of the exterior wall panels 1, 2, 3, and 4, external construction scaffolding may be installed outside the building, and to prevent it from collapsing, components (not shown) may be installed from the outdoor side of the horizontal joint 5 toward the indoor side to connect the external scaffolding to the building. At that time, the connecting members to the external scaffolding etc. come into contact with the inclined lips 81b, 91b of the first horizontal joint water-conducting member 81 and the second horizontal joint water-conducting member 91, and the inclined lips 81b, 91b are flexed and deformed toward the indoor side over a long period of time. It is preferable that the material be softer than JIS A hardness 70 degrees and that the rigidity of the inclined lips 81b, 91b not be too low so that the water-conducting function of the inclined lips 81b, 91b is not impaired even after temporary materials such as external scaffolding are removed. Furthermore, if the inclined lips 81b, 91b are too rigid, the attachment portions 81a, 91a fixed with the butyl tape B will be prone to peeling off during the installation of temporary materials such as external scaffolding, which is undesirable. For the above reasons, when installing temporary materials such as external scaffolding, the first horizontal joint water guide member 81 and the second horizontal joint water guide member 91 are preferably made of soft TPO or soft solid rubber (for example, JIS A hardness of 40 to 70 degrees). If the JIS A hardness exceeds 70 degrees, the parts attached and fixed with butyl tape B tend to peel off, which is not preferable. If the JIS A hardness is less than 40 degrees, the rigidity is insufficient, which is not preferable. Furthermore, it is preferable to set the thickness (rigidity) of the inclined lips 81b, 91b lower than the thickness (rigidity) of the mounting parts 81a, 91a, as this makes the parts attached and fixed with butyl tape B less likely to peel off.

[0045] 1 and 2, upper horizontal frame members 101, lower horizontal frame members 102, and vertical frame members 103, each made of steel and having a U-shaped cross section, are fixed to the indoor side of the lower left exterior wall panel 3 and the lower right exterior wall panel 4. These frame members, such as the upper horizontal frame member 101, lower horizontal frame member 102, and vertical frame member 103, are members used to ensure the strength of the exterior wall and to secure the exterior wall to a framework (not shown) or other structural frame (not shown). The vertical frame member 103 faces its opening away from the vertical joint 6 of the exterior wall panels 3, 4 (the right side for the exterior wall panel 3, and the left side for the exterior wall panel 4), and extends to the lower ends of the exterior wall panels 3, 4, leaving a gap at the top of the exterior wall panels 3, 4 that allows the first drainage member 20 and the second drainage member 40 to be installed (this gap is wider than the height of the first drainage member 20 and the second drainage member 40 to be installed). The gap between adjacent vertical frame members 103 is the same as the width of the vertical joint 6 (width in the left-right direction). The upper horizontal frame member 101 is installed with its opening facing downwards on the upper side surface of the vertical frame member 103, with its top surface flush with the top surface of the vertical frame member 103. The lower horizontal frame member 102 is installed with its opening facing upwards on the lower side surface of the vertical frame member 103, with its bottom surface flush with the bottom surface of the vertical frame member 103. It has been installed.

[0046] Next, a description will be given of the attachment of the first drainage member 20 and the second drainage member 40. The first drainage member 20 and the second drainage member 40 are installed on the indoor side of the exterior wall panels 3, 4 as shown in FIG.

[0047] The first drainage member 20 is placed on the vertical frame member 103 and the upper horizontal frame member 101 on the indoor side of the exterior wall panel 3. At this time, the left-right position is regulated by aligning the positioning portion 24 provided on the first drainage member 20 along the surface of the vertical joint 6 of the vertical frame member 103 fixed to the exterior wall panel 3, and at this position the rear surface 20b of the first drainage member 20 is fixed to the indoor side (rear surface) of the exterior wall panel 3 with butyl tape B. Then, the fixing portion 25 provided on the first drainage member 20 is pressed against the upper surface of the upper horizontal frame body 101 with a strip-shaped fixing member (metal clip) 104, thereby firmly fixing the first drainage member 20. The fixing member 104 is not particularly limited in configuration as long as it is capable of fixing the fixing portion 25 to the upper horizontal frame member 101, but here it is pressed down from above by the horizontal portion 104a, and the vertical portion 104b erected from the outdoor end of the horizontal portion 104a is also pressed against the mounting portion 81a of the first horizontal joint water-guiding member 81 attached to the top of the exterior wall panel 3.

[0048] The second drainage member 40 is placed on the vertical frame member 103 and the upper horizontal frame member 101 on the indoor side of the exterior wall panel 4. The left-right positioning is controlled by aligning the positioning portion 44 on the second drainage member 40 with the surface of the vertical frame member 103 fixed to the exterior wall panel 4 on the vertical joint 6 side. At this position, the rear surface 40b of the second drainage member 40 is fixed to the indoor side (rear surface) of the exterior wall panel 4 with butyl tape B. The fixing portion 45 on the second drainage member 40 is then firmly fixed by pressing it against the upper surface of the upper horizontal frame member 101 with a strip-shaped fixing member (metal clip) 104. As with the first drainage member 20, the horizontal portion 104a of the fixing member 104 presses the fixing portion 45 against the upper horizontal frame member 101, and the vertical portion 104b also presses against the mounting portion 91a of the second horizontal joint water-guiding member 91 attached to the top of the exterior wall panel 4.

[0049] Furthermore, the first drainage member 20 and the second drainage member 40 are installed so that, when viewed from above (Fig. 7) and from inside the house (Fig. 8), the tip of the water-conducting lip 22 provided on the first drainage member 20 is located on the second drainage member 40 side (right side) and above the side wall of the standing wall 42a which is the left end of the water-conducting recess 42 provided on the second drainage member 40 on the first drainage member 20 side. The water-conducting lip 22 and the water-conducting recess 42 are not in contact with each other. Furthermore, at this time, the tip tongue portion 42c, which is provided at the tip of the water-conducting recess 42 of the second drainage member 40 and protrudes to the outdoor side, as shown in Figure 9, is made to elastically contact the indoor side of the indoor side seal lip 62a of the vertical joint sealing backup material 62, which is provided on the indoor side of the vertical joint 6, as shown in Figure 7.

[0050] Before the exterior wall panels 3 and 4 are installed, an upper horizontal frame member 101, a lower horizontal frame member 102, a vertical frame member 103, a first drainage member 20, and a first horizontal joint water-guiding member 81 are already attached to the indoor side (back side) of the exterior wall panel 3 at the factory, and an upper horizontal frame member 101, a lower horizontal frame member 102, a vertical frame member 103, a second drainage member 40, and a second horizontal joint water-guiding member 91 are already attached to the indoor side (back side) of the exterior wall panel 4 adjacent to the exterior wall panel 3. When constructing the exterior wall panels 3, 4, the exterior wall panel 3 may be attached first and then the exterior wall panel 4, or vice versa. In particular, when the exterior wall panel 3 is attached first and then the exterior wall panel 4, the water-conducting recess 42 of the second drainage member 40 interferes with the water-conducting lip portion 22 of the first drainage member 20, but the water-conducting lip portion 22 is set to return to its original position (state) due to its elasticity after it has been bent and the water-conducting recess 42 is positioned below the water-conducting lip portion 22.

[0051] According to this waterproof structure of the exterior wall joints, water W that falls along the exterior wall panels 1 and 2 and attempts to infiltrate the interior through the horizontal joint 5 between the exterior wall panels 3 and 4 is blocked by the horizontal joint sealing material 71 provided as a primary sealant at the horizontal joint 5, the horizontal joint sealing backup material 72 provided as a secondary sealant, and the first horizontal joint water guide member 81 and the second horizontal joint water guide member 91 provided as tertiary sealants, and is then guided along the horizontal joint 5 to the vertical joints 6 formed between the exterior wall panels 1 and 3 and between the exterior wall panels 2 and 4, before falling downwards.

[0052] Even if there is some defect in the vertical joint sealant 61 provided as the primary sealant shown in Fig. 5 and water W passes through the vertical joint sealant 61, the vertical joint sealing backup material 62 provided as the secondary sealant can prevent the passing water W from entering the interior and allow it to flow downward and be drained. Also, even if there is some defect in the horizontal joint sealant 71 provided as the primary sealant shown in Fig. 6 and water W passes through the horizontal joint sealant 71, the horizontal joint sealing backup material 72 provided as the secondary sealant can prevent the passing water W from entering the interior and allow it to flow horizontally (towards the vertical joint 6) and be drained. Here, even if water W passes through the horizontal joint sealant 71 and then leaks indoors due to a seal failure or the like at the joints of the horizontal joint sealing backup material 72, the first horizontal joint water-guiding member 81 or the second horizontal joint water-guiding member 91 will stop the water (water W1, water W1') and guide the water horizontally (towards the vertical joint 6), and drain it downward as water W2, W2' from the opening ends 81c, 91c, as shown in Figure 2. Water W2 is collected by the first drainage member 20 on the exterior wall panel 3 side, and water W2' is collected by the second drainage member 40 on the exterior wall panel 4 side, and then drained.

[0053] More specifically, as shown in Figure 3(a), the water W2 drained downward from the opening end 81c is conveyed to the first outer protrusion 23 of the first drainage member 20 and guided to the lowest point by the inclination of the first outer protrusion 23 (water W3), and is then guided from the lowest point in the central part to the first inclined water guide section 21 (water W4). Note that when the water W2 flows down the lower surface of the mounting section 81a, the water W3 may also be guided to the first inclined water guide section 21 from a part other than the lowest point of the first outer protrusion 23. Water W4 guided to the first inclined water guide section 21 flows from the indoor side to the outdoor side and toward the vertical joint 6 (from right to left) due to the inclination of the first inclined water guide section 21, and is guided to the water guide lip section 22 (water W5), and due to the inclination of the water guide lip section 22, it flows toward the second drainage member 40 (from right to left) and falls into the water guide recess 42 of the second drainage member 40 (water W7). Furthermore, the water guide lip section 22 is also set to incline from the indoor side to the outdoor side, and moreover, the water guide lip section 22 protrudes so as to be in elastic contact with (or close to) the indoor side of the indoor side seal lip 62a of the vertical joint sealing backup material 62, so that part of the water W5 guided to the water guide lip section 22 falls along the indoor side of the indoor side seal lip 62a of the vertical joint sealing backup material 62 (water W6).

[0054] On the other hand, as shown in Figure 4(a), water W2' drained downward from the open end 91c is conveyed to the second outer protrusion 43 of the second drainage member 40 and guided to the lowest point by the inclination of the second outer protrusion 43 (water W3'), and is guided from the lowest point in the central part to the second inclined water guide section 41 (water W4'). Note that when water W2' flows down the lower surface of the mounting section 91a, water W3' may also be guided to the second inclined water guide section 41 from a part other than the lowest point of the second outer protrusion 43. Water W4' guided to the second inclined water guide section 41 flows from the outdoor side to the indoor side and toward the vertical joint 6 (from the right side to the left) due to the inclination of the second inclined water guide section 41, and is guided to the water guide recess 42 (water W5'), and in the water guide recess 42, due to its inclination, it flows from the indoor side to the outdoor side, and is guided downward from the tip tongue 42c to the indoor side of the indoor side seal lip 62a of the vertical joint sealing backup material 62 with which the tip tongue 42c elastically contacts (water W6' + water W7).

[0055] In other words, water W2' drained from the opening end 91c is collected on the second drainage member 40 side and flows through the water-conducting recess 42 (water W5'), and water W2 drained from the opening end 81c is collected by the first drainage member 20 and then falls from the water-conducting lip portion 22 into the water-conducting recess 42 of the second drainage member 40 (water W7).

[0056] Thus, according to the waterproof structure of the exterior wall joint of the first embodiment of the present invention, the water W2 drained from the opening end 81c and the water W2' drained from the opening end 91c are both guided to the water-conducting recess 42 of the second drainage member 40, and are guided from the tip tongue portion 42c to position P on the indoor side of the indoor-side seal lip 62a of the vertical joint sealing backup material 62 with which the tip tongue portion 42c elastically contacts (water W6' + water W7), and are made to descend from there, so that the discharge path of the water W is concentrated in one place and can be discharged from the targeted position. Furthermore, when viewed from above, the tip of the water-conducting lip 22 of the first drainage member 20 is located closer to the second drainage member 40 (to the right) than the left side of the standing wall 42a, which is the left end of the water-conducting recess 42 of the second drainage member 40 on the first drainage member 20 side. Therefore, even if there is some variation in the installation positions of the first drainage member 20 and the second drainage member 40 or between the exterior wall panels 1 to 4, water W can be reliably drained in a stable manner from position P on the indoor side of the indoor-side seal lip 62a of the vertical joint sealing backup material 62, with which the tip tongue 42c elastically contacts. In this embodiment, the configuration is such that variation of ±2 mm can be absorbed.

[0057] Here, when an experiment was conducted in which water W was flowed into the horizontal joint 5 under conditions of 500±250 Pa, it was confirmed that water leaking from the vertical joint 6 side was received by the first drainage member 20 and the second drainage member 40 and could be reliably guided from the tip tongue portion 42c of the water-conducting recess 42 to position P on the indoor side of the indoor-side sealing lip 62a of the vertical joint sealing backup material 62.

[0058] In this embodiment, the water-conducting lip portion 22 of the first drainage member 20 and the water-conducting recess 42 of the second drainage member 40 are not in contact with each other, so that variations can be absorbed when installing the first drainage member 20 and the second drainage member 40. However, it is also possible to position the lower end of the water-conducting lip portion 22 so that it contacts the upper surface of the indoor side wall of the standing wall 42a of the water-conducting recess 42.

[0059] Second Embodiment Next, a waterproof structure for an exterior wall joint according to a second embodiment of the present invention will be described with reference to Figures 10 and 11. The same parts as those in the first embodiment are designated by the same reference numerals.

[0060] In the first embodiment, the first drainage member 20 and the second drainage member 40, which have asymmetrical shapes, are installed facing each other with a vertical joint 6 in between them without contacting each other, but in the second embodiment, as shown in Figures 10 and 11, the first drainage member 51 and the second drainage member 53, which are symmetrical on the left and right, are installed facing each other.

[0061] In other words, the first drainage member 51 and the second drainage member 53 are installed on the exterior wall panel 3 and the exterior wall panel 4 with their left and right facing in opposite directions. The first drainage member 51 is identical to the first drainage member 20 of the first embodiment except for the water-conducting lip portion 22, but the second drainage member 52 is bilaterally symmetrical to the first drainage member 51, with, for example, the direction of inclination being opposite. The first water-conducting lip portion 52 and the second water-conducting lip portion 54 formed on the first drainage member 51 and the second drainage member 53 are slightly shorter in length than the water-conducting lip portion 22 of the first drainage member 20, so that when the first drainage member 51 and the second drainage member 53 are installed on the exterior wall panels 3 and 4, the tips of the first water-conducting lip portion 52 and the second water-conducting lip portion 54 come into contact with each other in the center of the vertical joint 6 (see FIG. 11 ). The first water-conducting lip portion 53 and the second water-conducting lip portion 54 are inclined downward toward the vertical joint 6, and also downward from the indoor side to the outdoor side. In addition, both the first water-conducting lip portion 52 and the second water-conducting lip portion 54 protrude outdoors beyond the rear surface 20b, and when installed on the exterior wall panel 3 and the exterior wall panel 4, respectively, the outdoor protruding ends of the first water-conducting lip portion 52 and the second water-conducting lip portion 54 are in elastic contact with (or close to) the indoor side of the indoor-side sealing lip 62a of the vertical joint sealing backup material 62.

[0062] According to this, the water W4 and water W4' collected by the first drainage member 51 and the second drainage member 53 both flow to the outdoor side from the top of the part where the tip of the first water-conducting lip portion 52 and the tip of the second water-conducting lip portion 54 make elastic contact (water W5, water W5'), and then flow down along the indoor side of the indoor-side sealing lip 62a of the vertical joint sealing backup material 62 (water W6, water W6'), so that the discharge path for the water W can be set to one location and discharged from the targeted position. Also, although the first drainage member 51 and the second drainage member 53 are symmetrical, they are not identical in shape and have opposite slopes, so if they are installed in the wrong direction, water will be drained from the indoor side to the outdoor side, so care must be taken.

[0063] (Third embodiment) Next, a waterproof structure for an exterior wall joint according to a third embodiment of the present invention will be described with reference to Figures 12 and 13. The same parts as those in the first embodiment are designated by the same reference numerals. In the second embodiment, the first water-conducting lip 52 and the second water-conducting lip 54 are arranged so as to be inclined further downward than the lower end of the first inclined water-conducting section 21, but it is also possible to provide a first water-conducting lip 56 and a second water-conducting lip 58 extending upward from the center of the right side surface 20d and the left side surface 20d' on the vertical joint 6 side of the first drainage member 55 and the first drainage member 57, so that when the first drainage member 55 and the second drainage member 57 are installed on the exterior wall panel 3 and the exterior wall panel 4, the tips of the first water-conducting lip 56 and the second water-conducting lip 58 come into contact with each other in the center of the vertical joint 6 (see Figure 13). The first water guide lip 56 and the second water guide lip 58 are inclined upward toward the vertical joint 6, and are inclined downward from the indoor side toward the outdoor side. Furthermore, the first water guide lip 56 and the second water guide lip 58 both protrude outdoors beyond the rear surface 20b, so that when installed on the exterior wall panel 3 and the exterior wall panel 4, the outdoor-side protruding ends of the first water guide lip 56 and the second water guide lip 58 are in elastic contact with (or close to) the indoor side surface of the indoor-side seal lip 62a of the vertical joint sealing backup material 62.

[0064] According to this, water W4 collected by the first drainage member 55 flows to the outdoors along the base of the first water-conducting lip portion 56 (water W5), and water W4' collected by the second drainage member 57 flows to the outdoors along the base of the second water-conducting lip portion 58 (water W5'), and then flows down along the indoor side of the indoor-side sealing lip 62a of the vertical joint sealing backup material 62 (water W6, water W6'). In this case, the water W has two discharge paths (water W6, water W6'), but the two paths are quite close to each other so that the water W can be discharged from any desired position. Again, although the first drainage member 55 and the first drainage member 57 are symmetrical, they are not identical in shape, and for example, the direction of the slope is opposite. Therefore, if the slope is reversed when installed, water will be drained from the outdoor side to the indoor side, so care must be taken.

[0065] In addition, the tip contact portions of the first water-conducting lip portion 52 and the second water-conducting lip portion 54 may be provided with a portion that elastically contacts the indoor side surface of the indoor-side sealing lip 62a of the vertical joint sealing backup material 62 provided on the indoor side of the vertical joint 6, similar to the tip tongue portion 42c provided in the water-conducting recess 42 of the second drainage member 40 in the first embodiment. Furthermore, the base of the first water-conducting lip portion 56 and the base of the second water-conducting lip portion 58 may be provided with a portion that elastically contacts the indoor side of the indoor-side sealing lip 62a of the vertical joint sealing backup material 62 provided on the indoor side of the vertical joint 6.

[0066] (Fourth embodiment) Next, a waterproof structure for an exterior wall joint according to a fourth embodiment of the present invention will be described with reference to Figures 17 to 23. The same parts as those in the first embodiment are designated by the same reference numerals. Furthermore, parts corresponding to the configuration of the first embodiment are designated by three-digit numbers with a "1" added before the two-digit numbers of the first embodiment, and the two-digit numbers are the same.

[0067] In the first embodiment, the first drainage member 20 and the second drainage member 40 were provided with fixing portions 25, 45 extending horizontally to the left and right, respectively, and these were used when attaching the first drainage member 20 and the second drainage member 40 to the exterior wall panel 3. However, in the fourth embodiment, as shown in Figures 17 and 18, the first drainage member 120 and the second drainage member 140 are not provided with fixing portions 25, 45. Instead, sandwiching plates 124a, 144a, which will be described later, are provided. In addition, the first drainage member 120 and the second drainage member 140 are provided with support plates 123a, 143a that protrude upward at their upper outdoor-facing portions, that is, at the upper left side of the first drainage member 120 and the upper right side of the second drainage member 140.

[0068] In addition, a positioning portion 124 (having the same configuration as the positioning portion 24 provided on the first drainage member 20) that protrudes downward from the bottom surface 120e is provided on the right side surface 120d, which is the surface on the vertical joint 6 side of the first drainage member 120, and furthermore, a clamping plate 124a is provided on the left side of the positioning portion 124 with a gap therebetween. Similarly, a positioning portion 144 (having the same configuration as the positioning portion 44 provided on the second drainage member 40) that protrudes downward from the bottom surface 140e is provided on the left side surface 140d, which is the surface on the vertical joint 6 side of the second drainage member 140, and furthermore, a clamping plate 144a is provided with a gap on the right side of the positioning portion 144. The front surfaces 120a, 140a of the first drainage member 120 and the second drainage member 140 are each largely cut out at the bottom. This is because the front surfaces 120a, 140a do not need to have a large shape at the bottom for drainage purposes, and the bottom is cut out to make it easier to remove the first drainage member 120 and the second drainage member 140 from the mold after molding.

[0069] When the first drainage member 120 and the second drainage member 140 are attached to the exterior wall panel 3 and the exterior wall panel 4, as shown in Figure 19, the upper end of the iron vertical frame member 103 with a U-shaped cross section is sandwiched between the positioning portion 124 and the clamping plate 124a, and between the positioning portion 144 and the clamping plate 144a on the underside of the first drainage member 120 and the second drainage member 140.This allows the first drainage member 120 and the second drainage member 140 to be attached to the exterior wall panel 3 and the exterior wall panel 4 in a more stable state, and by omitting the fixing member 104 used in the first embodiment, costs can be reduced.

[0070] 22 and 23, the distance between the positioning portion 124 and the sandwiching plate 124a, and the distance between the positioning portion 144 and the sandwiching plate 144a are both set to be slightly larger than the thickness of the vertical frame material 103. The sandwiching plate 124a of the first drainage member 120 and the sandwiching plate 144a of the second drainage member 140 are both set from the front faces 120a, 140a to approximately the center of the first drainage member 120 and the second drainage member 140, but are not set in the area from the approximately center to the outdoor side. This is because there are variations in the thickness of the vertical frame material 103, which is the object to be sandwiched, and so interference with the vertical frame material 103 is avoided when sandwiching.

[0071] 17 to 19, support plates 123a and 143a are provided on the upper sides of the first drainage member 120 and the second drainage member 140, respectively. As shown in Fig. 20, the support plates 143a press the ends of the second horizontal joint water-guiding members 91 from the indoor side to the outdoor side, making it possible to more reliably press down the ends of the second horizontal joint water-guiding members 91. Although not shown, the support plates 123a of the first drainage member 120 also press down the ends of the first horizontal joint water-guiding members 81 from the indoor side to the outdoor side, similar to the support plates 143a of the second drainage member 140 shown in Fig. 20.

[0072] As shown in FIG. 19, the first drainage member 120 and the second drainage member 140 are each provided with two bottom surface support plates 120e', 140e' spaced apart to support the bottom surfaces 120e, 140e. More specifically, the indoor end of the bottom support plate 120e' is connected to the front surface 120a, and the outdoor end of the bottom support plate 120e' is connected to the rear surface 120b. Similarly to the bottom support plate 120e', the indoor end of the bottom support plate 140e' is connected to the front surface 140a, and the outdoor end of the bottom support plate 140e' is connected to the rear surface 140b. Furthermore, by setting the bottom support plates 120e' and 140e' in this manner, when the butyl tape B is being crimped, the force pressing against the front surface 120a of the first drainage member 120 is more easily transmitted to the rear surface 120b via the bottom support plate 120e', and the force pressing against the front surface 140a of the second drainage member 140 is more easily transmitted to the rear surface 140b via the bottom support plate 140e', making it easier to crimp the butyl tape B and enabling the first drainage member 120 and the second drainage member 140 to be more firmly adhered and fixed.

[0073] Furthermore, as shown in Figure 17, the first drainage member 120 has the problem that if water gets on the butyl tape B attached to the outdoor side, it will run down the outer surface of the butyl tape B and wet the wall surface and metal parts.To prevent this, a drainage guide 123b and an extension 123c are provided. 17(a), 19, 21, and 22, the drainage guide 123b extends in the left-right direction on the upper surface of the water-guiding lip portion 122 (which has the same configuration as the water-guiding lip portion 22 provided on the first drainage member 20) provided at the right end. The drainage guide 123b is provided flush with the indoor side surface of the first outer protrusion 23 and is connected to extend rightward from the right end of the first outer protrusion 23, and the right end of the drainage guide 123b extends to the center of the water-guiding lip portion 122 in the left-right direction. The extension 123c is provided so as to bend at a right angle and protrude outdoors from the right end of the first outer protrusion 23, and the right end of the butyl tape B is covered from top to bottom by the extension 123c. Note that the butyl tape B is indicated by diagonal lines in Fig. 21.

[0074] Furthermore, in the second drainage member 40 of the first embodiment, as shown in Figure 4, an L-shaped extending upright wall 42a was provided in the water-conducting recess 42 provided at the bottom of the left side surface 40d, but in the fourth embodiment, as shown in Figures 18 and 23, in order to improve workability, the equivalent of the upright wall 42a is eliminated and the shape of the water-conducting recess 142 equivalent to the water-conducting recess 42 is made lip-shaped, making the gutter more flexible. Furthermore, in order to prevent water from dripping from the removed wall due to the elimination of the equivalent of the standing wall 42a, the water conveying section on the upper surface of the second drainage member 140 is configured so that water is drained toward the center of the water conveying recess 142 (the center of the indoor and outdoor sides of the water conveying recess 142). That is, while the second drainage member 40 of the first embodiment was provided on its upper surface with a triangular second inclined water conveying section 41 that also sloped downward from the outdoor side toward the indoor side, the second drainage member 140 of the fourth embodiment is provided on its upper surface with a water conveying section bottom 141a that slopes slightly downward from right to left, a triangular second inclined water conveying section 141 that slopes downward from the outdoor side toward the water conveying section bottom 141a on the indoor side, and a triangular third inclined water conveying section 141' that slopes downward from the indoor side toward the water conveying section bottom 141a on the outdoor side. As a result, water W4' guided to the second inclined water-conducting section 141 is collected at the water-conducting section bottom 141a, and water W5' is guided from the water-conducting section bottom 141a to the center of the water-conducting recess 142.

[0075] As shown in Figure 18, the lip-shaped bottom 142' of the water-conducting recess 142, which is the base of the water-conducting recess 142, is inclined from the indoor side toward the outdoor side, so that water W5' guided to the center of the water-conducting recess 142 is guided from the indoor side toward the outdoor side and is guided to the tip tongue 142c. Furthermore, as shown in FIGS. 18 and 21, the tip tongue portion 142c is inclined from the indoor side toward the outdoor side, similar to the first embodiment shown in FIG.

[0076] Although not shown in the figure, the water W5' guided to the water guide recess 142 is guided from the tip tongue portion 142c to position P on the indoor side of the indoor side seal lip 62a of the vertical joint sealing backup material 62 with which the tip tongue portion 142c elastically contacts (water W6' + water W7), as in the first embodiment shown in Figure 7, and then flows downward from there. 18, 21, and 23, the tip tongue 142c has a tip tongue bottom 142c' that is lower in the middle, so that water W5' guided to the water-conducting recess 142 is concentrated at the tip tongue bottom 142c' and is less likely to splash when guided to the vertical joint sealing backup material 62. Also, as shown in FIGS. 17, 18, and 19, the upper end surfaces of the first outer protrusion 123 of the first drainage member 120 and the second outer protrusion 143 of the second drainage member 140 may be configured as surfaces that slope downward from the outdoor side to the indoor side, making it easier to collect water.

[0077] In the first to fourth embodiments, the exterior wall panels 3 and 4 are provided with a first horizontal joint water-guiding member 81 and a second horizontal joint water-guiding member 91 as tertiary sealing materials, and the inclined lips 81b, 91b are extended to the side ends of the exterior wall panels 3 and 4 on the vertical joint 6 side so as not to straddle the vertical joint 6, but it is also possible to extend either one or both of the inclined lips 81b, 91b so that the side surfaces of the inclined lips 81b, 91b are butted against each other. In addition, the first drainage member 20 and the second drainage member 40, the first drainage member 51 and the second drainage member 53, the first drainage member 55 and the second drainage member 57, and the first drainage member 120 and the second drainage member 140 can be set longer so that they are half the length of the exterior wall panels 3 and 4, and the first horizontal joint water-guiding member 81 and the second horizontal joint water-guiding member 91 themselves can be omitted. [Explanation of symbols]

[0078] 1 Exterior wall panel (top left) 2 Exterior wall panel (top right) 3 Exterior wall panel (bottom left) 4 Exterior wall panel (bottom right) 5 Horizontal joint 6 Vertical joints 7,8 Horizontal joint drainage member 7a,8a Drainage section 9 Sealant 10 Secondary waterproofing material 11 Curved members 12 Back-up material 13 Back-up material backing plate 20 First drainage member 20a front 20b rear 20c left side 20d right side 20d´ left side 20e bottom 21 First inclined water conveyance section 21´ Second inclined water conveyance section 22 Water guide lip 23 First external protrusion 24 Positioning part 25 Fixed part 40 Second drainage member 40a front 40b rear 40c right side 40d left side 40d´ extension surface 40e bottom 41 Second inclined water conveyance section 42 Water conduction recess 42a Standing wall 42b Outdoor water conveyance section 42c Tip tongue 43 Second external protrusion 44 Positioning part 45 Fixed part 51 First drainage member 52 First water guide lip 53 Second drainage member 54 Second water guide lip 55 First drainage member 56 First water guide lip 57 Second drainage member 58 Second water guide lip 61 Vertical joint sealant 62 Vertical joint sealing backup material 62a Indoor seal lip 71 Horizontal joint sealant 72 Horizontal joint sealing backup material 81 First horizontal joint water conduction member 81a Mounting part 81b Sloping Lip 81c Open end 91 Second horizontal joint water conduction member 91a Mounting part 91b Sloping Lip 91c Open end 101 Upper horizontal frame member 102 Lower horizontal frame member 103 Vertical frame material 104 Fixing member 104a Horizontal section 104b Vertical section 120 First drainage member 120a front 120b rear 120c left side 120d right side 120e bottom 120e´ Bottom support plate 121 First inclined water conveyance section 122 Water guide lip 123 First external protrusion 123a Support plate 123b Drainage Guide 123c extension 124 Positioning part 124a Clamping plate 140 Second drainage member 140a front 140b rear 140c right side 140d left side 140d´ extension surface 140e bottom 140e´ Bottom support plate 141 Second inclined water conveyance section 141´ Third inclined water conveyance section 141a Bottom of the water conveyance section 142 Water-conducting recess 142´ Bottom of the water guide recess 142b Outdoor water conveyance section 142c Tip tongue 142c´ Bottom of tip tongue 143 Second external protrusion 143a Support plate 144 Positioning part 144a Clamping plate B Butyl tape P position W water W1~W7 Water W1´~W6´ Water

Claims

1. A waterproof structure for an exterior joint that prevents water from entering the indoor side from horizontal and vertical joints between a plurality of exterior wall panels arranged side by side vertically, horizontally, left, and right, comprising: A box-shaped first drainage member having an up-and-down height and a width inside and outside the building, attached to the upper part on the indoor side and the corner on the vertical joint side of one of the lower left exterior wall panel or the lower right exterior wall panel; A box-shaped second drainage member having an up-and-down height and a width inside and outside the building, attached to the upper part on the indoor side and the corner on the vertical joint side of the other of the lower left exterior wall panel or the lower right exterior wall panel; On the upper part of the first drainage member, a first inclined water guide portion that slopes downward toward the vertical joint side is provided, and on the right side surface on the vertical joint side of the first drainage member, a first water guide lip portion that extends toward the second drainage member side and descends from the indoor side to the outdoor side is provided; On the upper part of the second drainage member, a second inclined water guide portion that slopes downward toward the vertical joint side is provided, and on the left side surface on the vertical joint side of the second drainage member, a second water guide lip portion that extends toward the first drainage member side and descends from the indoor side to the outdoor side is provided; The waterproof structure for an exterior joint is characterized in that the first water guide lip portion and the second water guide lip portion are symmetrical left and right and the tip ends thereof are in contact with each other.

2. A waterproof structure for an exterior joint that prevents water from entering the indoor side from horizontal and vertical joints between a plurality of exterior wall panels arranged side by side vertically, horizontally, left, and right, comprising: A box-shaped first drainage member having an up-and-down height and a width inside and outside the building, attached to the upper part on the indoor side and the corner on the vertical joint side of one of the lower left exterior wall panel or the lower right exterior wall panel; A box-shaped second drainage member having an up-and-down height and a width inside and outside the building, attached to the upper part on the indoor side and the corner on the vertical joint side of the other of the lower left exterior wall panel or the lower right exterior wall panel; On the upper part of the first drainage member, a first inclined water guide portion that slopes downward toward the vertical joint side is provided, and at the lower end of the first inclined water guide portion, a water guide lip portion that extends toward the second drainage member side and descends from the indoor side to the outdoor side is provided; On the upper part of the second drainage member, a second inclined water guide portion that slopes downward toward the vertical joint side is provided, and on the lower part of the left side surface on the vertical joint side of the second drainage member, a water guide concave portion that protrudes toward the first drainage member side and descends from the indoor side to the outdoor side is provided. The waterproof structure for an outer wall joint, characterized in that when viewed from above, the tip of the water guiding lip portion is located on the second drainage member side rather than on the side end of the first drainage member side of the water guiding concave portion.

3. The waterproof structure for an outer wall joint according to claim 2, characterized in that the water guiding lip portion and the water guiding concave portion are non-contact.

4. A tip tongue portion that slopes downward toward the outdoor side is provided at the lower end of the outdoor side end of the water guiding concave portion. The waterproof structure for an outer wall joint according to claim 2 or 3, characterized in that the tip tongue portion protrudes further outside than the outdoor side surface of the second drainage member and elastically contacts the indoor side surface of the indoor side seal lip of the vertical joint sealing backup material provided in the vertical joint.

5. The waterproof structure for an outer wall joint according to claim 1 or 2, characterized in that the water guiding lip portion slopes downward from the root side to the tip side, and the slope is larger than that of the first inclined water guiding portion.

6. The waterproof structure for an outer wall joint according to claim 2, characterized in that the first inclined water guiding portion slopes downward from the indoor side to the outdoor side, and the second inclined water guiding portion slopes downward from the outdoor side to the indoor side.

7. The waterproof structure for an outer wall joint according to claim 1 or 2, characterized in that a first outer protruding portion higher than the first inclined water guiding portion is provided on the outer wall panel side of the first drainage member, and the first outer protruding portion slopes toward the center with the center portion of the first drainage member as the lowest point. A second outer protruding portion higher than the second inclined water guiding portion is provided on the outer wall panel side of the second drainage member, and the second outer protruding portion slopes toward the center with the center portion of the second drainage member as the lowest point.

8. A mounting portion that is mounted above the indoor side upper part of the outer wall panel to which the first drainage member is mounted and above the first drainage member, and a first horizontal joint water guiding member having an inclined lip that slopes inward from the mounting portion above the bottom surface of the horizontal joint and extends at least across the entire width of the outer wall panel to which the first drainage member is mounted. A waterproof structure for an exterior wall joint as described in claim 1 or 2, characterized in that it comprises a mounting portion that is mounted on the upper indoor side of the exterior wall panel to which the second drainage member is attached and above the second drainage member, and a second horizontal joint water-guiding member that extends from the mounting portion at an angle toward the indoor side above the bottom surface of the horizontal joint and has an inclined lip that extends at least to the full width of the exterior wall panel to which the second drainage member is attached.

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