JP2018003494A - Exterior wall joint waterproof structure and waterproofing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof structure that adequately waterproofs using a simple composition.SOLUTION: A waterproof structure of an external wall joint comprises: a wall lower sheet 33 whose upper part is fixed between a wall material 22 and a substrate frame 23 and whose lower part is disposed so as to droop below the wall material 22; a waterproof tape 36, which is disposed below a vertical joint 27 formed between external wall panels 21 on outdoor side so as to lie astride respective wall lower sheets 33 of adjacent wall materials 22; and a second gasket 32, which is disposed on the vertical joint 27 so that at least a tip on joint depth side thrusts between the substrate frames 23. The waterproof tape 36 made up of a stretchable and deformable sheet material is attached along a bottom edge of the wall material 22. The second gasket 32 has a section that extends downward the wall material 22 and is fitted so that the waterproof tape 36 is thrust beyond a rear face of the water material 22 by the extending section.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a water stop structure of an outer wall joint and a water stop treatment method.

  In a building such as a house, an outer wall may be configured by arranging a plurality of outer wall panels side by side. This type of outer wall panel includes a wall material and a base frame provided on the indoor side of the wall material. In this case, joints (vertical joints) extending vertically are formed between adjacent outer wall panels. The joint is provided with a water seal such as a gasket or a sealing material in order to prevent water such as rainwater from entering the indoor side through the joint.

  For example, in Patent Document 1, in a seal structure of an outer wall panel that closes a vertical joint on the upper floor of a building and a horizontal joint between the upper and lower floors, joint waterproofing is performed by a waterproof sheet of the vertical joint and a double gasket inside and outside. In order to solve the problem of workability deterioration at the construction site due to the fact that the waterproof sheet of the vertical joint has a considerable length, a steel plate was fixed at the intersection of the vertical joint and the horizontal joint A configuration in which a bonding sheet is provided is disclosed.

JP 2000-104355 A

  However, in existing techniques including the technique of the above-mentioned Patent Document 1, a complicated configuration is indispensable for improving the water stop performance at the outer wall joint, and there is room for technical improvement in view of cost, workability, and the like. Conceivable.

  This invention is made | formed in view of the said situation, and mainly provides the water stop structure of the outer wall joint which can perform water stop appropriately, and a water stop processing method, using a simple structure. It is the purpose.

  Hereinafter, means and the like effective for solving the above-described problems will be described while showing functions and effects as necessary. In the following, for ease of understanding, the reference numerals of the corresponding components in the embodiments of the invention are appropriately shown in parentheses, but are not limited to the specific configurations shown in parentheses.

The first invention is
Applied to a building exterior wall (20) configured by fixing a plurality of exterior wall panels (21) having a wall material (22) and a base frame (23) side by side, and in the adjacent exterior wall panels, the wall material and A water stop structure of a joint (27) formed between the base frames,
A lower wall sheet (33) in which an upper part is fixed between the wall material and the base frame, and a lower part is provided below the wall material;
A waterproof sheet (36) attached from the outdoor side so as to straddle each of the wall lower sheets of the wall material adjacent below the joint formed between the outer wall panels;
In the joint, a fixed seal (32) provided so that at least a tip portion on the back side of the joint enters between the base frames,
With
The water-stop sheet is made of a stretchable and deformable sheet material, and is attached along the lower end of the wall material,
The said fixed seal | sticker has a site | part extended below the said wall material, and is attached in the state which pushed the said water stop sheet into the back | inner side rather than the back surface of the said wall material by the said site | part.

  In the water stop structure, the fixed seal is attached to the joint formed by the adjacent outer wall panels so as to enter the gap between the base frames. Moreover, the water stop sheet | seat is affixed on each under-wall sheet so that it may straddle under each under-wall sheet under the joint. In particular, the fixed seal has a portion extending downward from the wall material, and is attached in a state where the waterproof sheet is pushed into the back side from the back surface of the wall material by the portion. In such a case, the water stop sheet can be brought into close contact with the fixed seal using the stretchability of the water stop sheet in the lower region of the wall material, and as a result, the water stop performance between the wall lower sheets can be improved. At this time, the lower part of the joint is a division between the left and right under-wall sheets, which is suitable for pushing and deforming the water-stop sheet with a fixed seal. As a result, water stopping can be appropriately performed while using a simple configuration.

  According to a second aspect of the present invention, the waterstop sheet has a protrusion (36a) at the top, and the protrusion is configured to enter the joint.

  Since the protrusion formed on the top of the waterproof sheet is configured to enter the joint, the waterproof sheet can be brought into close contact with the fixed seal even in the joint. Thereby, the area | region (vertical length) to which a waterproof sheet is closely_contact | adhered with respect to a fixed form seal can be enlarged, and the further improvement of waterproof performance can be implement | achieved.

  According to a third aspect of the present invention, the base frame has a portion extending downward from the wall material, and the waterproof sheet is positioned in a wall thickness direction with respect to the base frame on the outdoor side of the wall lower sheet. It is characterized by being pasted in an overlapping range.

  Since the waterproof sheet is attached to the base frame in the range that overlaps the wall thickness direction on the outdoor side of the lower wall sheet, the waterproof sheet stretches and deforms to the back side while being sandwiched between the outer wall panels. It is supposed to be. In this case, the waterproof sheet is deformed so as to surround the fixed seal, and the adhesion of the waterproof sheet to the fixed seal can be improved. Thereby, the further improvement of water stop performance is realizable.

  According to a fourth aspect of the present invention, a primary seal member (31) disposed between the adjacent wall members and a secondary seal member (32) disposed between the adjacent base frames are provided in the joint. It is a water stop structure provided, The said fixed seal is comprised by the said secondary seal member, It is characterized by the above-mentioned.

  In the water stop structure in which the primary seal member and the secondary seal member are provided in the joint, the fixed seal is configured by the secondary seal member. In this case, it is possible to realize an excellent water stop structure while using a simple configuration using the primary seal member and the secondary seal member.

  5th invention is applied to the said building outer wall part comprised from the said outer wall panel fixed to each said building unit in the unit type building (10) constructed | assembled by connecting several building units (15). The joint is formed between the outer wall panels as the building units are connected to each other, and the primary seal member and the secondary seal member are provided in the joint.

  In a unit type building, joints between outer wall panels are formed by connecting a plurality of building units. Here, in the joint of the unit boundary portion, unlike the joints of other parts, the primary seal member and the secondary seal member are provided in the joint while considering that the gap between the base frames is relatively large. Appropriate water stop structure can be realized. In this case, since the above-described fixed seal is provided as the secondary seal member, a more appropriate water stop structure can be realized at the joint of the unit boundary portion. When constructing a unit type building, workability related to water stoppage can be greatly improved.

The sixth invention is:
Applied to a building exterior wall (20) configured by fixing a plurality of exterior wall panels (21) having a wall material (22) and a base frame (23) side by side, and in the adjacent exterior wall panels, the wall material and A water stop treatment method for joints on an outer wall that performs a water stop treatment on a joint (27) formed between the base frames,
The outer wall panel includes a lower wall sheet (33) in which an upper part is fixed between the wall material and the base frame, and a lower part is provided below the wall material.
The water stop sheet (36) made of a stretchable and deformable sheet material straddles the wall lower sheets of the wall material adjacent to each other below the joint formed between the outer wall panels, and the wall Sheet pasting process to be pasted from the outdoor side along the lower end of the material,
After that, the fixed seal (32) was pushed into the back side of the joint from the back surface of the wall material by the lower end of the fixed seal and the lower part of the fixed seal (32) below the wall material. In a state, a seal mounting process for mounting in the joint,
It is characterized by providing.

  In the water stop treatment method described above, the fixed seal is attached to the joint formed by the adjacent outer wall panels so as to enter the gap between the base frames. In addition, a waterproof sheet is attached to each lower wall sheet so as to straddle each lower wall sheet below the joint. In particular, when attaching the fixed seal, the fixed seal is in a state where the lower end is below the wall material and the waterproof sheet is pushed into the back side of the joint from the back surface of the wall material. Installed in joints. In such a case, the water stop sheet can be brought into close contact with the fixed seal using the stretchability of the water stop sheet in the lower region of the wall material, and as a result, the water stop performance between the wall lower sheets can be improved. At this time, the lower part of the joint is a division between the left and right under-wall sheets, which is suitable for pushing and deforming the water-stop sheet with a fixed seal. As a result, water stopping can be appropriately performed while using a simple configuration.

  In a seventh aspect of the present invention, the base frame has a portion extending downward from the wall material. In the sheet sticking process, the base frame is arranged in a wall thickness direction with respect to the base frame on the outdoor side of the wall lower sheet. The waterproof sheet is pasted in an overlapping range.

  Since the waterproof sheet is attached to the base frame in the range that overlaps the wall thickness direction on the outdoor side of the lower wall sheet, the waterproof sheet stretches and deforms to the back side while being sandwiched between the outer wall panels. It is supposed to be. In this case, the waterproof sheet is deformed so as to surround the fixed seal, and the adhesion of the waterproof sheet to the fixed seal can be improved. Thereby, the further improvement of water stop performance is realizable.

The perspective view which shows the outline | summary of a unit type building. The perspective view which shows the outline | summary of a unit type building. The perspective view which shows the water stop structure in the lower end part of the second-floor part in a main body outer wall part. The disassembled perspective view which decomposes | disassembles and shows each member which comprises a water stop structure. The cross-sectional view which shows the water stop structure in a vertical joint. The longitudinal cross-sectional view which shows the water stop structure in a vertical joint. AA line sectional view of Drawing 6. Explanatory drawing which shows the manufacture procedure of a water stop structure.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a unit type building in which a plurality of building units are combined with each other is embodied as a building. FIG. 1 is a perspective view showing an outline of the unit type building.

  As shown in FIG. 1, the building 10 includes a building main body 13 having a first floor portion 11 and a second floor portion 12, and a roof portion 14 provided above the building main body 13. The building body 13 is configured by connecting a plurality of building units 15 to each other. The roof portion 14 is configured as a gable roof, for example. When the building 10 is constructed, the building unit 15 is manufactured in advance at the manufacturing factory, and then transported to the construction site by a truck or the like. And while the some building unit 15 is assembled | attached in a construction site, the building 10 is constructed | assembled by constructing the roof part 14 on it.

  Since the structure of the building unit 15 is well known, it will be briefly described here. The building unit 15 includes four columns disposed at the four corners thereof, and four ceiling beams and floor beams that respectively connect the upper end portion and the lower end portion of each column. It is formed in a rectangular parallelepiped shape by a large beam. The column is made of square steel in the shape of a square tube, and the ceiling beam and floor beam are made of channel steel having a U-shaped cross section.

  An outer peripheral portion of the building 10 is an outer wall portion 20. The outer wall portion 20 includes a main body outer wall portion 20 a provided in the building main body 13 and a roof outer wall portion 20 b provided in the roof portion 14.

  As shown in FIG. 2, the main body outer wall portion 20 a is composed of a plurality of outer wall panels 21 fixed to the ceiling beam and floor beam of the building unit 15. The outer wall panel 21 includes a wall material 22 and a base frame 23. Moreover, the roof outer wall part 20b is provided in the end face of the roof part 14, for example, and is comprised by the some outer wall panel 24 which has a shape according to the end face. The outer wall panel 24 includes a wall material 25 and a base frame 26. The wall materials 22 and 25 are made of an outer wall surface material such as a ceramic siding board, and an outdoor surface (outer wall surface) is formed by the surface. The base frames 23 and 26 are made of rectangular frames formed in a rectangular shape by, for example, channel steel or L-shaped steel. In addition, the outer wall panel 21 of the main body outer wall part 20a is basically attached to the building unit 15 in a unit factory, and the outer wall panel 24 of the roof outer wall part 20b is constructed on site.

  In the main body outer wall portion 20 a, a plurality of outer wall panels 21 are arranged side by side, and vertical joints 27 are formed between adjacent outer wall panels 21. In the roof outer wall portion 20 b, a plurality of outer wall panels 24 are arranged side by side, and vertical joints 28 are formed between adjacent outer wall panels 24.

  Next, the water stop structure of the vertical joint 27 will be described by taking the vertical joint 27 of the main body outer wall portion 20a as an example. FIG. 3 is a perspective view showing the water stop structure at the lower end of the second floor portion 12 in the main body outer wall portion 20a, and FIG. 4 is an exploded perspective view showing each member constituting the water stop structure in an exploded manner. The part shown in FIG. 4 corresponds to part A in FIG. 5 is a cross-sectional view showing the water-stopping structure in the vertical joint 27, and FIG. 6 is a vertical cross-sectional view showing the water-stopping structure in the vertical joint 27. Here, the water-stopping structure will be described for the vertical joint 27 in the position that becomes the boundary portion of the building unit 15 among the vertical joints 27 of the main body outer wall portion 20a. In FIG. 4, the unit docking line LU is shown at the center of the vertical joint 27. The joint width of the vertical joint 27 is, for example, about 10 mm.

  In addition, although illustration is abbreviate | omitted, in the outer wall part 20 of the building 10, the boundary part between the first floor part 11 and the second floor part 12, and the boundary part between the main body outer wall part 20a and the roof outer wall part 20b A makeup cylinder insert that hides the wall is attached, and the space between the wall members 22 and 25 in the vertical direction at these boundary portions is hidden by the makeup cylinder insert.

  As shown in FIGS. 3 to 6, a vertical joint 27 is formed between the adjacent outer wall panels 21 according to a gap between adjacent building units, and the vertical joint 27 is used as a primary seal member. The first gasket 31 and the second gasket 32 as a secondary seal member are fitted into the inner and outer doubles. Specifically, in the vertical joint 27, a gap S1 between the wall members 22 and a gap S2 between the vertical frame portions 23a of the base frame 23 are formed, and the first gasket 31 is provided in the gap S1. The second gasket 32 is provided in the gap S2. Note that the second gasket 32 may be provided so that at least the distal end portion on the back side of the joint enters between the vertical frame portions 23a. In this case, in the vertical joint 27, the first gasket 31 prevents intrusion of rainwater or the like that travels on the outer wall surface, and the second intrusion of a minute amount of rainwater or the like entering the back side of the first gasket 31 into the second side. The gasket 32 prevents it.

  Each of the gaskets 31 and 32 is formed in an elongated shape from an elastic material such as EPDM, and more specifically, has a hollow portion extending in the longitudinal direction, and the hollow portions open at the upper end and the lower end, respectively. It has a configuration.

  In addition, the base frame 23 of each outer wall panel 21 (specifically, the horizontal frame portion 23b of the frame) has an upper portion fixed to the back surface side of the wall member 22 and a lower portion hanging below the wall member 22. An under-wall sheet 33 is provided. In the present embodiment, the under-wall sheet 33 is attached while being sandwiched between the wall material 22 and the base frame 23. The under-wall sheet 33 is a waterproof sheet formed of a water-resistant material such as chloroprene rubber (CR rubber), and extends along the lower end portion of the wall material 22. A long water-stopping member 34 made of a rubber material (sponge material) such as EPDM is attached to the base frame 23 on the outdoor side of the lower wall sheet 33.

  As shown in FIG. 3 and FIG. 6, the lower wall sheet 33 has its lower end overlapped with the front side of the wall material 22 of the outer wall panel 21 in the second floor portion 12. In this case, the lower wall sheet 33 is in a state of being stretched up and down between the back surface side of the wall material 22 on the second floor side and the back surface side of the wall material 22 on the first floor side. Thereby, the space between the upper and lower wall members 22 is blocked by the lower wall sheet 33, and water such as rainwater is prevented from entering the indoor side through the upper and lower wall members 22.

  In addition, below the vertical joint 27, a water stop process is performed on a joint portion of the lower wall sheet 33 provided on each wall member 22. As an outline thereof, a waterproof tape 36 as a water-stop sheet that can be expanded and contracted is affixed from the outdoor side to a joining portion between adjacent lower wall sheets 33. In particular, in this case, the second gasket 32 has a portion extending downward from the wall material 22, and is attached to the vertical joint 27 in a state where the waterproof tape 36 is pushed deeper than the back surface of the wall material 22 by the portion. Yes.

  The waterproof tape 36 is configured by, for example, laminating a butyl rubber adhesive on a base material made of an EPDM rubber sheet that can be expanded and contracted. The entire surface of the waterproof tape 36 is an adhesive surface. In addition, the waterproof tape 36 has a rectangular shape as a whole, and has a protruding portion 36a protruding from the central portion of the upper side. The width L1 of the protrusion 36a may be larger than the width of the vertical joint 27.

  FIG. 6 shows a state in which the gaskets 31 and 32 are attached to the vertical joint 27 and a waterproof tape 36 is attached to the lower side of the vertical joint 27. In this case, the vertical frame portion 23a of the base frame 23 is attached to the back side (indoor side) of the wall member 22 so as to protrude downward by a dimension L2 from the lower end of the wall member 22, and the lower end of the wall member 22 The second gasket 32 is attached so as to protrude downward by a dimension L3 (> L2). Incidentally, the 1st gasket 31 is attached so that the position of a lower end may correspond with respect to the wall material 22. FIG.

  Further, the waterproof tape 36 is pushed into the back side by the second gasket 32 (specifically, a portion of the dimension L3) through the gap between the adjacent lower wall sheets 33, and locally than the back surface of the wall material 22. It is in a state of entering the back side.

  7 is a cross-sectional view taken along line AA in FIG. 6. As shown in FIG. 7, a waterproof tape 36 is attached to the outdoor side (upper side in the drawing) of the lower wall sheet 33, and the second When the gasket 32 is pushed into the gap S2 between the base frames, the waterproof tape 36 is pushed out to the back side of the joint. In this case, the waterproof tape 36 is attached to the base frame 23 (portion extending under the wall) on the outdoor side of the under-wall sheet 33 so as to overlap in the wall thickness direction, and is sandwiched between the base frames. In the state, it is extended and deformed to the back side (the lower side of the figure). In this state, the waterproof tape 36 is deformed so as to surround the second gasket 32, and the adhesion of the waterproof tape 36 to the second gasket 32 is enhanced.

  Next, the water stop structure of the vertical joint 27 will be described more specifically together with the manufacturing procedure. FIG. 8 is an explanatory diagram showing a manufacturing procedure of the water stop structure.

  In FIG. 8A, in the state where the building units of the first-floor portion 11 and the second-floor portion 12 are installed at the building construction site, the waterproof tape 36 is straddled across the lower wall sheet 33 of the adjacent outer wall panel 21. Affixed from the outdoor side (equivalent to “sheet pasting process”). At this time, the waterproof tape 36 is attached to the lower wall sheet 33 so that the upper end of the waterproof tape 36 is aligned with the lower end of the wall member 22. As a result, the protrusion 36 a of the waterproof tape 36 is set at a position where it enters the vertical joint 27. Further, by adhering the waterproof tape 36, the adjacent lower wall sheets 33 are integrated in the left-right direction.

  Thereafter, as shown in FIG. 8B, the second gasket 32 is fitted into the vertical joint 27 (corresponding to “seal attachment process”). At this time, the position of the second gasket 32 in the vertical direction is set so that the lower end of the second gasket 32 is below the wall material 22, and the position in the wall thickness direction is located on the back side of the wall material 22. The position is fitted into the vertical joint 27 as the position of the gap S <b> 2 between the base frames 23. As a result, as shown in FIG. 8C, the second gasket 32 is mounted so as to protrude from the lower end of the wall member 22 by the dimension L2.

  In the mounted state of the second gasket 32, the waterproof tape 36 is pushed into the back side by the second gasket 32 through the gap between the adjacent lower wall sheets 33, and locally on the back side from the back surface of the wall material 22. It is supposed to enter.

  Thereafter, as shown in FIG. 8C, in the vertical joint 27, the first gasket 31 is fitted in the gap S <b> 1 between the outdoor side of the second gasket 32, that is, the wall material 22. As a result, the first gasket 31 is disposed twice outside the second gasket 32.

  As described above, as shown in FIG. 3, the water stop process above the lower end of the upper wall member 22 and the water stop process below the lower end of the wall member 22 are completed.

  As mentioned above, according to the structure of this embodiment explained in full detail, the following outstanding effects are acquired.

  In the water stop structure, the second gasket 32 is attached to the vertical joint 27 formed by the adjacent outer wall panels 21 so as to enter the gap between the base frames. Further, below the vertical joint 27, a waterproof tape 36 is attached to each of the lower wall sheets 33 so as to straddle each lower wall sheet 33. In particular, the second gasket 32 has a portion extending downward from the wall material 22, and is attached in such a state that the waterproof tape 36 is pushed deeper than the back surface of the wall material 22 by the portion. In such a case, the waterproof tape 36 can be brought into close contact with the second gasket 32 by utilizing the stretchability of the waterproof tape 36 in the lower region of the wall material 22, and as a result, the water stop performance between the lower wall sheets can be improved. it can. At this time, the lower side of the vertical joint 27 is a division of the left and right under-wall sheets 33, which is preferable when the waterproof gasket 36 is pushed and deformed by the second gasket 32. As a result, water stopping can be appropriately performed while using a simple configuration.

  Since the protrusion 36 a formed on the upper portion of the waterproof tape 36 is configured to enter the vertical joint 27, the waterproof tape 36 can be in close contact with the second gasket 32 even in the vertical joint 27. Thereby, the area | region (vertical length) to which the waterproof tape 36 is closely_contact | adhered with respect to the 2nd gasket 32 can be enlarged, and the further improvement of water stop performance can be implement | achieved.

  Since the waterproof tape 36 is affixed to the base frame 26 on the outdoor side of the lower wall sheet 33 in a range overlapping in the wall thickness direction, the waterproof tape 36 is sandwiched between the outer wall panels 21 in the back side. It is intended to stretch and deform. In this case, the waterproof tape 36 is deformed so as to surround the second gasket 32, and the adhesion of the waterproof tape 36 to the second gasket 32 can be enhanced. Thereby, the further improvement of water stop performance is realizable.

  In the water stop structure in which the primary seal member and the secondary seal member are provided in the vertical joint 27, the second gasket 32 is configured by the secondary seal member. In this case, it is possible to realize an excellent water stop structure while using a simple configuration using the primary seal member and the secondary seal member.

  In the unit type building 10, the primary seal member and the secondary seal member are provided in the vertical joint 27 at the unit boundary, and the second gasket 32 is used as the secondary seal member. Thereby, the appropriate water stop structure is realizable in the vertical joint 27 of a unit boundary part. When constructing the unit type building 10, workability regarding the water stop treatment can be greatly improved.

  At the time of building construction at the building construction site, a water-stop structure having the above-described configuration is constructed by sequentially performing a sheet sticking process for attaching the waterproof tape 36 and a seal attaching process for attaching the second gasket 32. . In this case, construction of an appropriate water stop structure at the vertical joint 27 can be realized.

  Since the water stop structure of the present embodiment uses a dry construction method, it can be said that it is excellent in construction workability and maintainability.

  The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

  In the above embodiment, the protrusion 36a is provided on the waterproof tape 36 serving as a water-stop sheet, but the protrusion 36a may not be provided. Even in such a configuration, the second gasket 32 has a portion extending downward from the wall material 22, and the waterproof tape 36 is attached in a state where the second gasket 32 is pushed deeper than the back surface of the wall material 22 by the portion. Again, the desired effect can be achieved.

  -You may comprise the primary seal member in the vertical joint 27 not by a fixed gasket but by an indeterminate seal, such as a sealing material.

  -The water stop processing method of this invention is applicable not only at the time of the new construction of a building but at the time of renovation of a building, ie, at the time of repair of a building outer wall part.

  The present invention can be applied not only to the vertical joint 27 at the unit boundary between building units but also to other locations. For example, the water stop structure of the present invention may be applied to the vertical joint 27 other than the unit boundary portion in the main body outer wall portion 20a. Or in the building which has a balcony, the water stop structure of this invention may be applied to the vertical joint near a balcony floor part. Moreover, the water stop structure of this invention may be applied to the outer wall joint in a building entrance corner.

  The present invention can be applied to a unit type building, for example, a steel frame construction method building, a conventional wooden construction method building, or the like.

  DESCRIPTION OF SYMBOLS 10 ... Building, 20 ... Outer wall part, 21 ... Outer wall panel, 22 ... Wall material, 23 ... Base frame, 27 ... Vertical joint, 31 ... 1st gasket (primary sealing member), 32 ... 2nd gasket (secondary sealing member) ), 33 ... Under-wall sheet, 36 ... Waterproof tape (water-proof sheet), 36a ... Projection.

Claims (7)

Applied to a building exterior wall (20) configured by fixing a plurality of exterior wall panels (21) having a wall material (22) and a base frame (23) side by side, and in the adjacent exterior wall panels, the wall material and A water stop structure of a joint (27) formed between the base frames,
A lower wall sheet (33) in which an upper part is fixed between the wall material and the base frame, and a lower part is provided below the wall material;
A waterproof sheet (36) attached from the outdoor side so as to straddle each of the wall lower sheets of the wall material adjacent below the joint formed between the outer wall panels;
In the joint, a fixed seal (32) provided so that at least a tip portion on the back side of the joint enters between the base frames,
With
The water-stop sheet is made of a stretchable and deformable sheet material, and is attached along the lower end of the wall material,
The fixed seal has a portion extending downward from the wall material, and is attached in a state where the waterproof sheet is pushed into the back side from the back surface of the wall material by the portion. Water stop structure.   The water stop structure for an outer wall joint according to claim 1, wherein the water stop sheet has a protrusion (36a) at an upper portion thereof, and the protrusion enters the joint. . The base frame has a portion extending below the wall material,
The said water stop sheet | seat is affixed in the range which overlaps with a wall thickness direction with respect to the said base frame in the outdoor side of the said wall lower sheet | seat, The stop of the outer wall joint of Claim 1 or 2 characterized by the above-mentioned. Water structure. A water stop structure in which a primary seal member (31) disposed between the adjacent wall members and a secondary seal member (32) disposed between the adjacent base frames are provided in the joint. There,
The water stop structure for an outer wall joint according to any one of claims 1 to 3, wherein the fixed seal is constituted by the secondary seal member. In the unit type building (10) constructed by connecting a plurality of building units (15), it is applied to the building outer wall portion composed of the outer wall panel fixed to each building unit,
5. The joint is formed between the outer wall panels as the building units are connected to each other, and the primary seal member and the secondary seal member are provided in the joint. The waterproof structure of the outer wall joint described. Applied to a building exterior wall (20) configured by fixing a plurality of exterior wall panels (21) having a wall material (22) and a base frame (23) side by side, and in the adjacent exterior wall panels, the wall material and A water stop treatment method for joints on an outer wall that performs a water stop treatment on a joint (27) formed between the base frames,
The outer wall panel includes a lower wall sheet (33) in which an upper part is fixed between the wall material and the base frame, and a lower part is provided below the wall material.
The water stop sheet (36) made of a stretchable and deformable sheet material straddles the wall lower sheets of the wall material adjacent to each other below the joint formed between the outer wall panels, and the wall Sheet pasting process to be pasted from the outdoor side along the lower end of the material,
After that, the fixed seal (32) was pushed into the back side of the joint from the back surface of the wall material by the lower end of the fixed seal and the lower part of the fixed seal (32) below the wall material. In a state, a seal mounting process for mounting in the joint,
A water-stopping method for an outer wall joint characterized by comprising: The base frame has a portion extending below the wall material,
7. The outer wall joint fixing according to claim 6, wherein, in the sheet pasting process, the waterproof sheet is pasted on the outdoor side of the lower wall sheet within a range overlapping with the base frame in a wall thickness direction. Water treatment method.

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