Waterproofing structure for exterior wall joints

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 an external wall joint for preventing water from intruding into the indoor side through the joints between external wall panels.

Background Art

[0002] Conventionally, in order to prevent rainwater and the like from intruding into the indoor side through joints between external wall panels of houses and the like, it has been practiced to fill a sealant between the joints, or provide a water stop lip as a backup for the sealant. However, if the sealing at the joint portion should break due to aging deterioration or other factors, water will intrude into the indoor side. For this reason, there has been known an arrangement in which a horizontal joint drainage member is further provided on the indoor side of the external wall panel as a tertiary waterproof material (Patent Documents 1 and 2).

[0003] The horizontal joint drainage member described in Patent Document 1 has a fin-shaped cross section, and an elongated lip piece extending upward in the lateral (horizontal) direction to cover the bottom surface of the horizontal joint from the indoor side. The horizontal joint drainage member extends along the horizontal joint, and is arranged such that an end portion thereof slightly protrudes into the vertical joint.

[0004] In addition, the horizontal joint drainage member described in Patent Document 2 is adapted to be applicable to thin external wall panels 1 to 4 in which the depth of the external wall joints 5 and 6 is reduced. As shown in Figs. 14 to 16, box-shaped horizontal joint drainage members 7 and 8 are respectively provided at upper corner portions of lower external wall panels 3 and 4 among the external wall panels 1 to 4 arranged side by side vertically and horizontally. A sealant 9 and a secondary waterproof member 10 are provided from the outdoor side in the horizontal joint 5 and the vertical joint 6 between the external wall panels 1 to 4. If any trouble occurs in these members, and water W passes through the sealant 9 and the secondary waterproof member 10 of the horizontal joint, the horizontal joint drainage members 7 and 8 receive the passed water W, cause the water W to flow in the lateral direction, pour the water W into the outdoor side of the vertical joint 6 from drainage portions 7a and 8a provided on the vertical joint 6 side, and discharge the water W downward.

Prior Art Literature

Patent Literature

[0005] [Patent Document 1] Japanese Patent Publication No. 2016-166490 [Patent Document 2] Japanese Patent Publication No. 2016-188497 [Overview of the project] [Problems that the invention aims to solve]

[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 the water W 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 are variations in the width of the vertical joint 6 or the installation positions of the horizontal joint drainage members 7 and 8, it may not be possible to discharge water W to the vertical joint 6 side at the desired location, potentially resulting in unstable discharge.

[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 scatter into the indoor area. Furthermore, in the case of the horizontal joint drainage members 7 and 8 described in Patent Document 2, the water W received is directed to the outdoor side of the vertical joint 6, so the water W does not scatter to the indoor side. However, in order to direct the water W to the outdoor side of the vertical joint 6, it is necessary to provide a curved member 11 that extends to the left and right on the secondary waterproofing member 10 provided on the indoor side of the sealing material 9 of the vertical joint. Moreover, in order to prevent the secondary waterproofing member 10 of the vertical joint 6 from entering the indoor side, a backup material 12 is required, and in order to prevent the backup material 12 from entering the indoor side, a backup material backing plate 13 is required, resulting in an increased number of parts.

[0008] Therefore, the objective of the present invention is to provide a waterproof structure for exterior wall joints that can stably drain water even with some variation, and that reduces the number of parts. [Means for solving the problem]

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

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

[0011] Furthermore, the present invention is characterized in that the water-conducting lip portion (22, 122) and the water-conducting recess (42, 142) are in contact with each other.

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

[0013] Furthermore, the present invention is characterized in that the water-conducting lip portion (22, 122) slopes downward from the base to the tip, and this slope is greater than that of the first inclined water-conducting portion (21, 121).

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

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

[0016] Furthermore, the present invention includes a mounting portion (81a) attached to the upper indoor side of the exterior wall panel (3) to which the first drainage members (20, 51, 55, 120) are attached, and above the first drainage members (20, 51, 55, 120), and a first horizontal joint water guide member (81) having an inclined lip (81b) that extends inward from the mounting portion (81a) to above the bottom surface of the horizontal joint (5) and extends to at least the full width of the exterior wall panel (3) to which the first drainage members (20, 51, 55, 120) are attached, The invention is characterized by comprising a second horizontal joint water guide member (91) having: a mounting portion (91a) mounted on an upper part of an indoor side of an outer wall panel (4) to which the second drainage member (40, 53, 57, 140) is attached, the mounting portion (91a) being located above the second drainage member (40, 53, 57, 140); and an inclined lip (91b) extending from the mounting portion (91a) while inclining toward the indoor side from the mounting portion (91a) to a position above a bottom surface of the horizontal joint (5), the inclined lip (91b) extending at least over an entire width of the outer wall panel (4) to which the second drainage member (40, 53, 57, 140) is attached.

[0017] It should be noted that the symbols in parentheses indicate corresponding elements or corresponding matters described in the drawings and the embodiments for carrying out the invention described later. [Effects of the Invention]

[0018] According to the present invention, water that falls along the outdoor side of an upper outer wall panel and attempts to intrude into the indoor side through a horizontal joint between outer wall panels is blocked by a sealing material provided in the horizontal joint. However, water may intrude into the indoor side through the horizontal joint due to aging degradation or the like. The intruded water is received by a first drainage member and a second drainage member attached to a lower outer wall panel, and guided to a first water guide lip portion and a second water guide lip portion. Since the first water guide lip portion and the second water guide lip portion descend from the indoor side toward the outdoor side, are bilaterally symmetric, and have tip ends in contact with each other, the water guided to the first water guide lip portion and the second water guide lip portion flows toward the vertical joint side and is discharged downward.

[0019] At this time, if the first water guide lip portion and the second water guide lip portion descend toward the tip ends, the water discharge path is formed at one location near the mutually contacting tips of the first water guide lip portion and the second water guide lip portion, which makes it easy to discharge water from a pre-targeted position. Conversely, if the first water guide lip portion and the second water guide lip portion rise toward their tips, the water discharge paths are located at two positions, namely the root of the first water guide lip portion and the root of the second water guide lip portion that are in contact with each other. These two roots are quite close to each other, and furthermore, they are elastically in contact with (or in close proximity to) the indoor side surface of the indoor seal lip of the vertical joint sealing backup material, so compared with the conventional example (FIGS. 14 to 16), it is easier to discharge water from a pre-targeted position. Furthermore, there is no need to particularly increase the number of parts unlike the conventional example (FIGS. 14 to 16), and the structure is simple. In addition, here, although the first drainage member and the second drainage member are symmetrical, they do not have the same shape, and for example, the direction of inclination is reversed. Therefore, if they are reversed during installation, water will be drained from the indoor side to the outdoor side, so attention is required.

[0020] Further, according to the present invention, the first drainage member has a water guide lip portion, and the second drainage member has a water guide recess. When viewed from above, the tip of the water guide lip portion is located closer to the second drainage member side than the side end of the water guide recess on the first drainage member side. Therefore, when water descends along the indoor side of the outer wall panel to which the first drainage member is attached, the water is guided by the water guide lip portion, flows from the indoor side to the outdoor side, and falls into the water guide recess. Conversely, when water descends along the indoor side of the outer wall panel to which the second drainage member is attached, the water is guided into the water guide recess. In this way, all water descending along the outer wall panels is guided to the water guide recess and discharged downward from the indoor side of the vertical joint, so there is only one water discharge path from the water guide recess, making it easy to discharge water from a pre-targeted position. In this case also, there is no need to particularly increase the number of parts unlike the conventional example (FIGS. 14 to 16).

[0021] Further, according to the present invention, when viewed from above, the tip of the water guide lip portion of the first drainage member is located closer to the second drainage member than the left end of the water guide recess on the first drainage member side. Therefore, even if there is some variation in the installation positions of the first drainage member and the second drainage member or variation between outer wall panels, water can be reliably discharged from one targeted position in a stable state.

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

[0023] Furthermore, according to the present invention, the lower end of the outdoor end of the water-conducting recess is provided with a tip tongue that slopes downward toward the outdoors, and the tip tongue protrudes further toward the outdoors 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, so that water can be discharged downward along the indoor side of the joint water-stopping lip, thereby suppressing splashing when water is discharged.

[0024] Furthermore, according to the present invention, the water-conducting lip section slopes downward from the base to the tip, and this slope is greater than that of the first inclined water-conducting section, making it easier to discharge water.

[0025] Furthermore, according to the present invention, the first inclined water conduit slopes downward from the indoor side to the outdoor side, and the second inclined water conduit slopes downward from the outdoor side to the indoor side, making it easier to collect water.

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

[0027] Furthermore, according to the present invention, a first horizontal joint water guide member having an inclined lip extending at least the full width of the exterior wall panel is installed on 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 guide member having an inclined lip extending at least the full width of the exterior wall panel is installed on the upper indoor side of the exterior wall panel to which the second drainage member is attached, and above the second drainage member, so that water does not penetrate into the interior of the building beyond the horizontal joint. [Brief explanation of the drawing]

[0028] [Figure 1] This is a perspective view showing the appearance of a waterproofing structure for an exterior wall joint according to the first embodiment of the present invention. [Figure 2] Figure 1 is an enlarged perspective view showing the main parts of the waterproofing structure of the exterior wall joint. [Figure 3] This is an enlarged perspective view showing the first drainage member in Figure 1. [Figure 4] This is an enlarged perspective view showing the second drainage member in Figure 1. [Figure 5] This is an enlarged cross-sectional view of line XX in Figure 1. [Figure 6] This is an enlarged cross-sectional view of the YY line in Figure 1. [Figure 7] Figure 1 is an enlarged cross-sectional view along the ZZ line. [Figure 8] This is an enlarged front view showing the main parts of the waterproofing structure of the exterior wall joints in Figure 1. [Figure 9] Figure 4 is an enlarged perspective view showing the configuration of the water-conducting recess when the second drainage member is installed on the exterior wall panel. [Figure 10] This is an enlarged perspective view showing the first drainage member of the waterproofing structure for exterior wall joints according to the second embodiment of the present invention. [Figure 11] This is an enlarged front view showing the main part of the waterproofing structure for exterior wall joints according to the second embodiment of the present invention. [Figure 12] This is an enlarged perspective view showing the first drainage member of the waterproofing structure for exterior wall joints according to the third embodiment of the present invention. [Figure 13]This is an enlarged front view showing the main part of the waterproofing structure for exterior wall joints according to the third embodiment of the present invention. [Figure 14] This is a cross-sectional view showing a conventional waterproofing structure for exterior wall joints. [Figure 15] This is a front view showing a conventional waterproofing structure for exterior wall joints. [Figure 16] Figure 14 is an enlarged perspective view showing the horizontal joint drainage member. [Figure 17] This is an enlarged perspective view showing the first drainage member of the waterproofing structure for exterior wall joints according to the fourth embodiment of the present invention. [Figure 18] This is an enlarged perspective view showing the second drainage member of the waterproofing structure for exterior wall joints according to the fourth embodiment of the present invention. [Figure 19] This is a side view, seen from the indoor side, showing the positional relationship between the first drainage member and the second drainage member installed on the exterior wall panel according to the fourth embodiment of the present invention. [Figure 20] Figure 19 is an enlarged cross-sectional view of the EE line. [Figure 21] This is a perspective view from the outside of the building showing the positional relationship between the first drainage member and the second drainage member installed on the exterior wall panel according to the fourth embodiment of the present invention. [Figure 22] This is an enlarged plan view showing the first drainage member according to the fourth embodiment of the present invention installed on an exterior wall panel. [Figure 23] This is an enlarged plan view showing the second drainage member according to the fourth embodiment of the present invention installed on an exterior wall panel. [Modes for carrying out the invention]

[0029] (First Embodiment) A waterproofing structure for exterior wall joints according to the first embodiment of the present invention will be described with reference to Figures 1 to 9. The same reference numerals are used for parts that are the same as in the conventional example. The waterproof structure for exterior wall joints according to the first embodiment of the present invention prevents water from entering the interior 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" refers 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 indoor side of the lower left exterior wall panel 3, and at the corner on the vertical joint 6 side, a box-shaped first drainage member 20, as shown in Figure 3, with vertical height and width both indoors and outdoors, is attached to the indoor side (back) of the exterior wall panel 3 with butyl tape B. Furthermore, at the upper indoor side of the lower right exterior wall panel 4 and at the corner on the vertical joint 6 side, a box-shaped second drainage member 40, as shown in Figure 4, with vertical height and width both indoors and outdoors, is attached to the indoor side (back) of the exterior wall panel 4 with butyl tape B.

[0031] The first drain member 20 and the second drain member 40 are installed facing each other with a vertical joint 6 in between, but they have asymmetrical shapes. Furthermore, the first drain member 20 and the second drain member 40 are made of resin or rubber and are manufactured by mold molding or the like.

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

[0033] The first inclined water intake section 21 slopes downward from left to right, that is, toward the vertical joint 6, and also slopes downward from the indoor side toward the outdoor side. Furthermore, a water-conducting lip section 22 is provided at the lower end (right end) of the first inclined water-conducting section 21, which extends downward towards the second drainage member 40 and also descends from the indoor side to the outdoor side. The water-conducting lip portion 22 is tapered in thickness from its base to its tip, and its width (width in the indoor / outdoor direction) is the same as the width of the first inclined water-conducting portion 21. However, as shown in Figure 3, the water-conducting lip portion 22 may be made to protrude further outward than the rear surface 20b, so as to elastically contact (or be in close proximity to) the indoor side of the indoor side sealing lip 62a of the vertical joint sealing backup material 62.

[0034] Furthermore, a first external projection 23 is provided on the upper part of the rear surface 20b of the first drainage member 20, which faces the outer wall panel 3, and is higher than the upper surface of the first inclined water guide section 21. The first external projection 23 is V-shaped, inclined from the left and right towards the center, with the center of the first drainage member 20 being its lowest point. Furthermore, the front surface 20a and left side surface 20c of the first drainage member 20 are set higher than the upper surface of the first inclined water guide section 21, and the first outward projection 23, front surface 20a, and left side surface 20c form a weir relative to the first inclined water guide section 21.

[0035] Furthermore, the right side surface 20d of the first drain member 20, which is the side facing the vertical joint 6, is provided with a positioning portion 24 that protrudes below the bottom surface 20e, and the lower part of the left side surface 20c of the first drain member 20 is provided with a fixing portion 25 that protrudes further to the left. These positioning parts 24 and fixing parts 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, the second drainage member 40 is a box shape composed of a front surface 40a that faces indoors when attached to the exterior wall panel 4, a rear surface 40b that faces outdoors (towards the exterior wall panel 4), a right side surface 40c (the side furthest from the vertical joint 6) and a left side surface 40d (the side closer to the vertical joint 6) that connect the front surface 40a and the rear surface 40b, and a bottom surface 40e (the bottom surface 40e can be omitted), with a second inclined water guide section 41 provided at the top.

[0037] The second inclined water channel 41 slopes downward from right to left, that is, toward the vertical joint 6, and also slopes downward from the outdoor side toward the indoor side, in the opposite direction to the first inclined water channel 21. Following the slope of the second inclined water channel 41, the left side surface 40d of the second drainage member 40 is also triangular in shape, with the upper part cut toward the indoor side. Furthermore, a water-conducting recess 42 is provided at the lower part of the left side surface 40d of the second drainage member 40, which protrudes toward the first drainage member 20 and descends from the indoor side to the outdoor side. The water-conducting recess 42 has an upright wall 42a that extends in an L-shape, where the lower part of the front surface 40a of the second drainage member 40 protrudes to the left, then bends at a right angle and extends outwards, and an outdoor water-conducting section 42b which is continuously connected to the lower end of the upright wall 42a and the left side of a positioning section 44 that protrudes to the lower side of the left side surface 40d (described later). This outdoor water-conducting section 42b descends 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. Furthermore, the outdoor end of the outdoor water-conducting section 42b is provided with a tip tongue portion 42c that protrudes further outwards and slopes downward toward the outdoors. The tip tongue portion 42c is tapered and pointed at the tip, and protrudes further outwards than the rear surface 40b of the second drainage member 40.

[0038] Furthermore, a second external projection 43 is provided on the upper part of the rear surface 40b of the second drainage member 40, which is on the side of the outer wall panel 4, and is higher than the upper surface of the second inclined water guide section 41. The second external projection 43 is V-shaped, inclined from the left and right towards the center, with the center of the second drainage member 40 being its lowest point. Furthermore, the front surface 40a and right side surface 40c of the second drainage member 40 are set higher than the upper surface of the second inclined water guide section 41, and the second outward projection 43, front surface 40a, and right side surface 40c form a weir relative to the second inclined water guide section 41.

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

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

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

[0042] Furthermore, as shown in Figure 6, the horizontal joint 5 between the upper and lower exterior wall panels 1 and 3 is filled with horizontal joint sealant 71 on the exterior side, similar to the vertical joint 6, and a resin or rubber horizontal joint sealant backup material 72 is press-fitted into the interior side as a secondary waterproofing material. Furthermore, on the indoor side of the horizontal joint sealing backup material 72, a first horizontal joint water guide member 81 made of resin or rubber is attached as a tertiary waterproofing material. This member has a mounting portion 81a and an inclined lip 81b, and extends horizontally in a long, elongated shape. The mounting portion 81a is attached by butyl tape B to the upper indoor side of the lower left exterior wall panel 3, where 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 mounting portion 81a to above the bottom surface of the horizontal joint 5 and extends to at least the full width of the exterior wall panel 3. Here, the ends of the inclined lip 81b and the mounting portion 81a are cut off so that they end before the vertical joint 6, and an open end 81c is provided.

[0043] Similarly, in the horizontal joint 5 between the upper and lower exterior wall panels 2 and 4, horizontal joint sealing material 71 is filled on the exterior side, as shown in Figure 6, and a resin or rubber horizontal joint sealing backup material 72 is press-fitted into the interior side as a secondary waterproofing material. Furthermore, on the indoor side of the horizontal joint sealing backup material 72, a second horizontal joint water guide member 91 made of resin or rubber is attached as a tertiary waterproofing material. This member has a mounting portion 91a and an inclined lip 91b, and extends horizontally in a long, elongated shape. The mounting portion 91a is attached by butyl tape B to the upper indoor side of the lower right exterior wall panel 4, where the second drainage member 40 is attached, and above the second drainage member 40, as shown in Figures 6 and 2. The inclined lip 91b extends inclined indoors from the mounting portion 91a to above the bottom surface of the horizontal joint 5 and extends to at least the full width of the exterior wall panel 4. Here, the ends of the inclined lip 91b and the mounting portion 91a are cut off so as to end before the vertical joint 6, and an open end 91c is provided.

[0044] Furthermore, during the construction period of exterior wall panels 1, 2, 3, and 4, construction scaffolding and other structures may be installed on the exterior of the building. In order to prevent them from collapsing, components (not shown) may be installed to connect the scaffolding and other structures to the building, extending from the exterior side of the horizontal joint 5 towards the interior side. In this process, the connecting members to the external scaffolding and the like come into contact with the inclined lips 81b, 91b of the first horizontal joint water guide member 81 and the second horizontal joint water guide member 91, and the inclined lips 81b, 91b are deformed by bending toward the interior over a long period of time. Subsequently, even after the removal of temporary materials such as external scaffolding, it is preferable to use a material that is softer than JIS A hardness 70 degrees, while ensuring that the rigidity of the inclined lips 81b and 91b is not compromised, so as not to impede the water-conducting function of the inclined lips 81b and 91b. Furthermore, if the rigidity of the inclined lips 81b and 91b is too strong, the butyl tape B used to secure the attachment parts 81a and 91a may easily peel off during the installation period of temporary materials such as external scaffolding, which is undesirable. Based on the above, when installing temporary materials such as external scaffolding, the material for the first horizontal joint water guide member 81 and the second horizontal joint water guide member 91 is preferably soft TPO or soft solid rubber (for example, JIS A hardness 40 to 70 degrees). If the hardness exceeds JIS A 70 degrees, the adhesive fixing part with butyl tape B will peel off easily, which is undesirable. If the hardness is less than JIS A 40 degrees, the rigidity will be insufficient, which is undesirable. Furthermore, it is preferable to set the thickness (rigidity) of the inclined lip 81b, 91b lower than the thickness (rigidity) of the mounting parts 81a, 91a, as this makes it less likely for the adhesive fixing part with butyl tape B to peel off.

[0045] Furthermore, as shown in Figures 1 and 2, upper horizontal frame members 101, lower horizontal frame members 102, and vertical frame members 103, all made of iron 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, including the upper horizontal frame member 101, lower horizontal frame member 102, and vertical frame member 103, are components for ensuring the strength of the exterior wall and for fixing the exterior wall to the structural frame (not shown) such as the framework (not shown). The vertical frame members 103 face their openings in the opposite direction from the vertical joint 6 side of the exterior wall panels 3 and 4 (right side for exterior wall panel 3, left side for exterior wall panel 4), and extend to the lower end of the exterior wall panels 3 and 4, leaving a gap above the exterior wall panels 3 and 4 that allows for the installation of the first drainage member 20 and the second drainage member 40 (this gap is wider than the height of the first drainage member 20 and the second drainage member 40 to be installed). The spacing 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 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 of the vertical frame member 103, with its bottom surface flush with the bottom surface of the vertical frame member 103. It is installed.

[0046] Next, the installation of the first drain member 20 and the second drain member 40 will be described. As shown in Figure 2, the first drain member 20 and the second drain member 40 are installed on the indoor side of the exterior wall panels 3 and 4.

[0047] The first drain member 20 is placed on the indoor side of the exterior wall panel 3, on top of the vertical frame member 103 and the upper horizontal frame member 101. At this time, the positioning portion 24 provided on the first drain member 20 is aligned with the surface of the vertical joint 6 side of the vertical frame member 103 fixed to the exterior wall panel 3, thereby restricting its position in the left-right direction. At this position, the rear surface 20b of the first drain member 20 is fixed to the indoor side (back) of the exterior wall panel 3 with butyl tape B. The fixing portion 25 provided on the first drain member 20 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. The fixing member 104 is not particularly limited in its configuration as long as it is designed to fix the fixing portion 25 to the upper horizontal frame member 101. However, in this case, the horizontal portion 104a presses down from above, and the vertical portion 104b, which is erected from the outdoor end of the horizontal portion 104a, is pressed against the mounting portion 81a of the first horizontal joint water guide member 81 attached to the upper part of the exterior wall panel 3.

[0048] The second drain member 40 is placed on the indoor side of the exterior wall panel 4, on top of the vertical frame member 103 and the upper horizontal frame member 101. At this time, the positioning portion 44 provided on the second drain member 40 is aligned with the surface of the vertical joint 6 side of the vertical frame member 103 fixed to the exterior wall panel 4, thereby restricting its position in the left-right direction, and the rear surface 40b of the second drain member 40 is fixed to the indoor side (back) of the exterior wall panel 4 with butyl tape B. The fixing portion 45 provided on the second drain 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. Similar to the first drain 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 is pressed against the mounting portion 91a of the second horizontal joint water guide member 91 attached to the upper part of the exterior wall panel 4.

[0049] Furthermore, the first drain member 20 and the second drain member 40 are installed such that, when viewed from above (Figure 7) and from the inside of the building (Figure 8), the tip of the water-guiding lip portion 22 provided on the first drain member 20 is located on the second drain member 40 side (right side) and above the side wall of the vertical wall 42a which is the left end of the water-guiding recess 42 provided on the first drain member 20 side of the second drain member 40. The water-guiding lip portion 22 and the water-guiding recess 42 are in a non-contact state. Furthermore, as shown in Figure 9, the tip tongue portion 42c of the water-guiding recess 42 of the second drainage member 40, which is provided at the tip and protrudes to the outside, is made to elastically contact the indoor side surface of the indoor side sealing 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 construction of exterior wall panels 3 and 4, the upper horizontal frame member 101, lower horizontal frame member 102, vertical frame member 103, first drainage member 20, and first horizontal joint water guide member 81 are pre-installed at the factory on the indoor side (back side) of exterior wall panel 3, and the upper horizontal frame member 101, lower horizontal frame member 102, vertical frame member 103, second drainage member 40, and second horizontal joint water guide member 91 are pre-installed on the indoor side (back side) of exterior wall panel 4 adjacent to exterior wall panel 3. Furthermore, when installing the exterior wall panels 3 and 4, the exterior wall panel 3 may be installed first, followed by the exterior wall panel 4, or vice versa. In particular, when the exterior wall panel 3 is installed first, the water-guiding recess 42 of the second drainage member 40 will interfere with the water-guiding lip portion 22 of the first drainage member 20. However, the water-guiding lip portion 22 is designed to bend, and after the water-guiding recess 42 is positioned below the water-guiding lip portion 22, it will return to its original position (state) due to its elasticity.

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

[0052] Even if there is a defect in the vertical joint sealant 61, which is provided as a primary sealant as shown in Figure 5, and water W passes through the vertical joint sealant 61, the vertical joint sealant backup material 62, which is provided as a secondary sealant, prevents the water W that has passed through from entering the interior and allows it to flow downward and be drained. Similarly, even if there is a defect in the horizontal joint sealant 71, which is provided as a primary sealant as shown in Figure 6, and water W passes through the horizontal joint sealant 71, the horizontal joint sealant backup material 72, which is provided as a secondary sealant, prevents the water W that has passed through from entering the interior and allows 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 into the interior due to a seal failure at the joint of the horizontal joint sealant backup material 72, the first horizontal joint water guide member 81 or the second horizontal joint water guide member 91 will stop the water flow and guide the water (water W1, water W1') in the horizontal direction (towards the vertical joint 6), and as shown in Figure 2, the water will be drained downward from the opening ends 81c, 91c as water W2, W2'. Water W2 is collected by the first drain member 20 on the exterior wall panel 3 side, and water W2' is collected by the second drain 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 carried to the first external projection 23 of the first drainage member 20 and guided to the lowest point by the inclination of the first external projection 23 (water W3), and then guided to the first inclined water guide section 21 from the lowest point in the central part (water W4). In addition, if the water W2 travels along the lower surface of the mounting part 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 external projection 23. Water W4 guided to the first inclined water guide section 21 flows from the indoor side to the outdoor side and towards the vertical joint 6 side (right side to left side) due to the inclination of the first inclined water guide section 21 and is guided to the water guide lip section 22 (water W5). Due to its inclination, the water guide lip section 22 flows towards the second drainage member 40 side (right side to left side) 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 be inclined from the indoor side to the outdoor side, and moreover, the water guide lip section 22 protrudes so as to elastically contact (or be close to) the indoor side of the indoor side seal lip 62a of the vertical joint sealing backup material 62, so that some of the water W5 guided to the water guide lip section 22 flows down the indoor side of the indoor side seal lip 62a of the vertical joint sealing backup material 62 and falls (water W6).

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

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

[0056] Thus, according to the waterproofing structure for exterior wall joints according to the first embodiment of the present invention, water W2 drained from the opening end 81c and water W2' drained from the opening end 91c are both guided to the water-guiding recess 42 of the second draining member 40, and then guided from the tip tongue 42c to position P on the indoor side of the indoor side seal lip 62a of the vertical joint sealing backup material 62 to which the tip tongue 42c elastically contacts (water W6' + water W7), and from there they descend. As a result, the discharge path of water W is concentrated in one place and can be discharged from the desired position. Furthermore, when viewed from above, the tip of the water-guiding lip portion 22 of the first drainage member 20 is positioned on the second drainage member 40 side (right side) of the left side of the vertical wall 42a, which is the left end of the water-guiding 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 variation between the exterior wall panels 1 to 4, water W can be reliably discharged from position P on the indoor side of the indoor-side sealing lip 62a of the vertical joint sealing backup material 62, where the tip tongue portion 42c elastically contacts in a stable state. In this embodiment, the configuration is such that variations of ±2 mm can be absorbed.

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

[0058] In this embodiment, the water-guiding lip portion 22 of the first drainage member 20 and the water-guiding recess 42 of the second drainage member 40 are not in contact, which allows for the absorption of variations during the installation of the first drainage member 20 and the second drainage member 40. However, it is also possible to position the lower end of the water-guiding lip portion 22 so that it contacts the upper surface of the indoor-side wall of the vertical wall 42a of the water-guiding recess 42.

[0059] (Second embodiment) Next, with reference to Figures 10 and 11, a waterproof structure for exterior wall joints according to the second embodiment of the present invention will be described. The same reference numerals are used for parts identical to those in the first embodiment.

[0060] In the first embodiment, the asymmetrical first drain member 20 and the second drain member 40 were installed facing each other with a vertical joint 6 in between, without contact with each other. In the second embodiment, however, as shown in Figures 10 and 11, the symmetrical first drain member 51 and the second drain member 53 were 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 sides reversed. The first drain member 51 is identical to the first drain member 20 of the first embodiment except for the water-guiding lip portion 22, but the second drain member 52 is symmetrical to the first drain member 51, for example, with the direction of inclination reversed. The first water-guiding lip portion 52 and the second water-guiding lip portion 54 formed on the first drain member 51 and the second drain member 53 are slightly shorter in length than the water-guiding lip portion 22 of the first drain member 20, so that when the first drain member 51 and the second drain member 53 are installed on the exterior wall panel 3 and the exterior wall panel 4, the tips of the first water-guiding lip portion 52 and the second water-guiding lip portion 54 come into contact with each other in the center of the vertical joint 6 (see Figure 11). The first water-guiding lip portion 53 and the second water-guiding lip portion 54 slope downward toward the vertical joint 6, and also slope downward toward the exterior from the indoor side. Furthermore, both the first water-conducting lip portion 52 and the second water-conducting lip portion 54 protrude outward from the rear surface 20b, and when installed on the exterior wall panel 3 and exterior wall panel 4 respectively, the outward protruding ends of the first water-conducting lip portion 52 and the second water-conducting lip portion 54 elastically contact (or come close to) the indoor side surface 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 outwards from the upper part of the area where the tip of the first water guide lip 52 and the tip of the second water guide lip 54 elastically contact each other (water W5, water W5'), and descend along the indoor side of the indoor side seal lip 62a of the vertical joint sealing backup material 62 (water W6, water W6'), so that the water W can be discharged from a single, targeted location. Furthermore, although the first drainage member 51 and the second drainage member 53 are symmetrical, they are not identical in shape and have opposite slopes. Therefore, if they are installed incorrectly, water will be drained from the indoor side to the outdoor side, so care must be taken.

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

[0064] According to this, the water W4 collected by the first drainage member 55 flows to the outside along the base of the first water-conducting lip section 56 (water W5), the water W4' collected by the second drainage member 57 flows to the outside along the base of the second water-conducting lip section 58 (water W5'), and is directed downward 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, there are two discharge paths for water W (water W6, water W6'), but the two paths are very close together, and both can be discharged from the desired location. Although the first drainage member 55 and the first drainage member 57 are symmetrical, they are not identical in shape. For example, their slopes are in opposite directions, so if they are installed incorrectly, water will drain from the outside to the inside, requiring careful attention.

[0065] Furthermore, the tip contact portion 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, portions may be provided at the base of the first water-conducting lip portion 56 and the base of the second water-conducting lip portion 58 that elastically contact 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.

[0066] (Fourth embodiment) Next, with reference to Figures 17 to 23, a waterproof structure for exterior wall joints according to the fourth embodiment of the present invention will be described. The same reference numerals are used for parts identical to those in the first embodiment. Furthermore, for parts corresponding to the configuration of the first embodiment, a "1" is added before the two-digit number of the first embodiment, resulting in a three-digit number, while the two-digit number remains the same.

[0067] In the first embodiment, the first drain member 20 and the second drain member 40 are provided with fixing parts 25 and 45 that extend horizontally to the left and right, respectively, and are used when attaching the first drain member 20 and the second drain member 40 to the exterior wall panel 3. However, in the fourth embodiment, as shown in Figures 17 and 18, the first drain member 120 and the second drain member 140 are not provided with fixing parts 25 and 45. Instead, clamping plates 124a and 144a, which will be described later, are provided. In addition, the first drain member 120 and the second drain member 140 are provided with upwardly projecting support plates 123a and 143a on the upper part of the outdoor side, on the upper left side of the first drain member 120 and on the upper right side of the second drain member 140.

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

[0069] When attaching the first drain member 120 and the second drain member 140 to the exterior wall panel 3 and the exterior wall panel 4, as shown in Figure 19, the upper ends of the vertical frame members 103, which are made of iron and have a U-shaped cross-section, are sandwiched between the positioning part 124 and the clamping plate 124a, and between the positioning part 144 and the clamping plate 144a, on the lower side of the first drain member 120 and the second drain member 140. This allows the first drain member 120 and the second drain member 140 to be attached to the exterior wall panel 3 and the exterior wall panel 4 in a more stable state, and also makes it possible to reduce costs by omitting the fixing member 104 used in the first embodiment.

[0070] Furthermore, as shown in Figures 22 and 23, the distance between the positioning part 124 and the clamping plate 124a, and the distance between the positioning part 144 and the clamping plate 144a are both set to be slightly larger than the thickness of the vertical frame material 103. Also, the clamping plate 124a of the first drainage member 120 and the clamping plate 144a of the second drainage member 140 are both set from the front 120a, 140a side to approximately the center of the first drainage member 120 and the second drainage member 140, but are not set in the part from approximately the center to the outdoor side. This is because there are variations in the thickness of the vertical frame members 103, which are the objects to be clamped, and this prevents interference with the vertical frame members 103 during the clamping process.

[0071] Furthermore, as shown in Figures 17 to 19, support plates 123a and 143a are provided above the first drainage member 120 and the second drainage member 140, respectively. Also, as shown in Figure 20, the end of the second horizontal joint water guide member 91 is pressed down from the indoor side to the outdoor side by the support plate 143a, making it possible to more reliably press down on the end of the second horizontal joint water guide member 91. In addition, although not shown in the illustration, similar to the support plate 143a of the second drainage member 140 shown in Figure 20, the end of the first horizontal joint water guide member 81 is also pressed down from the indoor side to the outdoor side by the support plate 123a of the first drainage member 120.

[0072] Furthermore, as shown in Figure 19, the first drain member 120 and the second drain member 140 are each provided with two bottom support plates 120e' and 140e' spaced apart to support the bottom surfaces 120e and 140e, respectively. 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, 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 applying pressure to the butyl tape B, the force pressing down on 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 down on 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'. This makes it easier to apply pressure to the butyl tape B and allows the first drainage member 120 and the second drainage member 140 to be more firmly bonded and fixed.

[0073] Furthermore, as shown in Figure 17, the first drainage member 120 has a problem in that when water comes into contact with the butyl tape B attached to its outdoor side, the water can travel along 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. As shown in Figures 17(a), 19, 21, and 22, the drainage guide 123b extends horizontally across the upper surface of the water-conducting lip portion 122 (which has the same configuration as the water-conducting lip portion 22 provided on the first drainage member 20) located at its right end. The drainage guide 123b is flush with the indoor side surface of the first external projection 23 and extends to the right from the right end of the first external projection 23, with the right end of the drainage guide 123b extending to the center of the water-conducting lip portion 122 in the horizontal direction. The extension portion 123c is provided so as to bend at a right angle from the right end of the first external projection portion 23 and protrude outwards, and the right end of the butyl tape B is covered from top to bottom by the extension portion 123c. In Figure 21, the butyl tape B is shown with diagonal lines.

[0074] Furthermore, in the second drainage member 40 of the first embodiment, as shown in Figure 4, an L-shaped vertical wall 42a was provided in the water guide recess 42 located at the lower part of the left side surface 40d. However, in the fourth embodiment, as shown in Figures 18 and 23, in order to improve workability, the vertical wall 42a is eliminated and the shape of the water guide recess 142 corresponding to the water guide recess 42 is made lip-shaped to make the gutter more flexible. Furthermore, in order to prevent water from dripping from the area where the wall was removed, as the equivalent of the upright wall 42a has been eliminated, the configuration of the water guide section on the upper surface of the second drainage member 140 is set so that water drains to the central part of the water guide recess 142 (the central part between the indoor and outdoor sides of the water guide recess 142). Specifically, in the second drainage member 40 of the first embodiment, a triangular second inclined water guide section 41 that slopes downward from the outdoor side to the indoor side is provided on its upper surface, but in the second drainage member 140 of the fourth embodiment, a water guide section bottom 141a that slopes slightly downward from right to left is provided on the central part of its upper surface, a triangular second inclined water guide section 141 that slopes downward from the outdoor side to the indoor side water guide section bottom 141a is provided, and a triangular third inclined water guide section 141' that slopes downward from the indoor side to the outdoor side water guide section bottom 141a is provided. As a result, the water W4' guided to the second inclined water guide section 141 is collected at the bottom of the water guide section 141a, and the water W5' is guided from the bottom of the water guide section 141a to the central part of the water guide recess 142.

[0075] Furthermore, as shown in Figure 18, the base of the lip-shaped water-conducting recess 142, the bottom 142' of the water-conducting recess, is sloped from the indoor side to the outdoor side. Therefore, the water W5' guided to the center of the water-conducting recess 142 is guided from the indoor side to the outdoor side and led to the tip tongue 142c. Furthermore, as shown in Figures 18 and 21, the tip tongue portion 142c is inclined from the indoor side to the outdoor side, similar to the first embodiment shown in Figure 7.

[0076] Although not shown in the diagram, the water W5' guided into the water-guiding recess 142 is guided from the tip tongue 142c to position P on the indoor side of the indoor side seal lip 62a of the vertical joint sealing backup material 62 to which the tip tongue 142c elastically contacts (water W6' + water W7), and then descends from there. Furthermore, as shown in Figures 18, 21 and 23, the tip tongue portion 142c has a tip tongue bottom portion 142c' that is lower in the central part, so that the water W5' guided into the water-guiding recess 142 is concentrated in the tip tongue bottom portion 142c', making it less likely to splash when guided to the vertical joint sealing backup material 62. Also, as shown in Figures 17, 18 and 19, the upper end surfaces of the first external projection 123 of the first drainage member 120 and the second external projection 143 of the second drainage member 140 may be made to be surfaces that slope downward from the outdoor side to the indoor side to make 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 guide member 81 and a second horizontal joint water guide member 91 as tertiary sealing materials, and the inclined lips 81b and 91b are extended to the side edges of the exterior wall panels 3 and 4 on the vertical joint 6 side so as not to straddle the vertical joint 6. However, it is also possible to extend either one or both of the inclined lips 81b and 91b so that their sides abut against each other. Furthermore, the first drain member 20 and the second drain member 40, the first drain member 51 and the second drain member 53, the first drain member 55 and the second drain member 57, and the first drain member 120 and the second drain member 140 can each be set to be half the length of the exterior wall panels 3 and 4, thereby eliminating the first horizontal joint water guide member 81 and the second horizontal joint water guide member 91 themselves. [Explanation of Symbols]

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

Claims

1. A waterproof structure for exterior wall joints that prevents water from entering the interior through horizontal and vertical joints between multiple exterior wall panels arranged in a row vertically and horizontally, In the aforementioned multiple exterior wall panels arranged side by side vertically and horizontally, a box-shaped first drainage member having vertical height and width both indoors and outdoors is attached to the upper indoor side of one of the lower left or lower right exterior wall panels and to the corner on the vertical joint side, The box-shaped second drainage member, which has vertical height and width both indoors and outdoors, is attached to the upper indoor side of the other of the lower left or lower right exterior wall panel and to the corner on the vertical joint side. The upper part of the first drainage member is provided with a first inclined water guide section that slopes downward toward the vertical joint, and the right side of the first drainage member toward the vertical joint is provided with a first water guide lip section that extends toward the second drainage member and slopes downward from the indoor side to the outdoor side. The upper part of the second drainage member is provided with a second inclined water guide section that slopes downward toward the vertical joint, and the left side of the second drainage member toward the vertical joint is provided with a second water guide lip section that extends toward the first drainage member and slopes downward from the indoor side to the outdoor side. A waterproofing structure for exterior wall joints, characterized in that the first water-conducting lip portion and the second water-conducting lip portion are symmetrical and their tips are in contact with each other.

2. A waterproof structure for exterior wall joints that prevents water from entering the interior through horizontal and vertical joints between multiple exterior wall panels arranged in a row vertically and horizontally, In the aforementioned multiple exterior wall panels arranged side by side vertically and horizontally, a box-shaped first drainage member having vertical height and width both indoors and outdoors is attached to the upper indoor side of one of the lower left or lower right exterior wall panels and to the corner on the vertical joint side, The box-shaped second drainage member, which has vertical height and width both indoors and outdoors, is attached to the upper indoor side of the other of the lower left or lower right exterior wall panel and to the corner on the vertical joint side. The upper part of the first drainage member is provided with a first inclined water guide section that slopes downward toward the vertical joint, and the lower end of the first inclined water guide section is provided with a water guide lip section that extends toward the second drainage member and slopes downward from the indoor side to the outdoor side. The upper part of the second drainage member is provided with a second inclined water guide section that slopes downward toward the vertical joint, and the lower left side of the second drainage member toward the vertical joint is provided with a water guide recess that protrudes toward the first drainage member and slopes downward from the indoor side to the outdoor side. A waterproofing structure for an exterior wall joint, characterized in that, when viewed from above, the tip of the water-conducting lip portion is located on the second drainage member side of the water-conducting recess, rather than on the side end of the first drainage member side.

3. The waterproofing structure for an exterior wall joint according to claim 2, characterized in that the water-conducting lip portion and the water-conducting recess portion are in non-contact.

4. The lower end of the outdoor-side end of the water-conducting recess is provided with a tip tongue that slopes downward toward the outdoor side. The waterproofing structure for an exterior wall joint according to claim 2 or 3, characterized in that the tip tongue portion protrudes further outward 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.

5. The waterproofing structure for exterior wall joints according to claim 2, characterized in that the water-conducting lip portion slopes downward from the base to the tip, and the slope is greater than that of the first inclined water-conducting portion.

6. The waterproofing structure for exterior wall joints according to claim 2, characterized in that the first inclined water guide section slopes downward from the indoor side to the outdoor side, and the second inclined water guide section slopes downward from the outdoor side to the indoor side.

7. The waterproofing structure for an exterior wall joint according to claim 1 or 2, characterized in that the first drainage member has a first external projection that is higher than the first inclined water guide portion on the exterior wall panel side, the first external projection is inclined toward the center such that the center of the first drainage member is its lowest point, and the second drainage member has a second external projection that is higher than the second inclined water guide portion on the exterior wall panel side, the second external projection is inclined toward the center such that the center of the second drainage member is its lowest point.

8. A mounting portion is attached to the upper indoor side of the exterior wall panel to which the first drainage member is attached, and is located above the first drainage member; and a first horizontal joint water guide member has an inclined lip that extends inward from the mounting portion to above the bottom surface of the horizontal joint and extends to at least the full width of the exterior wall panel to which the first drainage member is attached; The waterproofing structure for an exterior wall joint according to claim 1 or 2, comprising: a mounting portion 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; and a second horizontal joint water guide member having an inclined lip that extends inward from the mounting portion to above the bottom surface of the horizontal joint and extends to at least the full width of the exterior wall panel to which the second drainage member is attached.

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