JP2018003378A - 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 25 and a substrate frame 26 and whose lower part is disposed so as to droop below the wall material 25; a silicon seal 38, which is disposed below a vertical joint 28 formed between the wall materials 25 on outdoor side of the wall lower sheet 33; waterproof sheets 36, 37, which are attached to the wall lower sheets 33 so as to lie astride respective wall sheets 33 of adjacent wall materials 25; and a gasket 35, which is disposed on the vertical joint 28. The waterproof sheet 37 covers the silicon seal 38 below the wall material 25 from outdoor side and is disposed so that the upper part is thrust into depth side of a lower end of the gasket 35 in the vertical joint 28.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.

  As a water-stopping structure for the outer wall joint, for example, Patent Document 1 includes a long U-shaped recess in plan view that is inserted into a vertical joint, and flanges that extend on both side edges of the recess. The structure provided with the vertical joint water stop part, the apron part extended in the horizontal direction in the lower end of the vertical joint water stop part, and the bottom face part which plugs up the bottom face of the vertical joint water stop part is disclosed.

Japanese Patent No. 5358264

  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
This is applied to a building outer wall (20) constituted by fixing a plurality of outer wall panels (24) having a wall member (25) and a base frame (26) side by side, and is formed between the adjacent wall members. The water stop structure of the joint (28),
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;
An indeterminate seal (38) provided from the outdoor side of the lower wall sheet below the joint formed between the wall materials;
Water-stop sheets (36, 37, 51) to be attached to the respective wall lower sheets so as to straddle the wall lower sheets of the adjacent wall materials;
A fixed seal (35) provided on the joint;
With
The water stop sheet is provided in a state in which the non-uniform seal is covered from the outdoor side below the wall material, and the upper part of the waterproof sheet enters the back side of the lower end of the fixed seal in the joint. Features.

  In the joint structure described above, a waterproof sheet is attached to each lower wall sheet so as to straddle each lower wall sheet below the joint formed by the adjacent wall material, and An irregular seal is provided from the outside. In particular, the water-stop sheet is provided in a state in which the non-uniform seal is covered from the outdoor side below the wall material, and the upper part enters the back side of the lower end of the standard seal in the joint. In such a case, the sealing performance of the amorphous seal can be improved by covering the amorphous seal with the water-stop sheet. At this time, in a state where the upper part of the waterproof sheet is in the back side of the lower end of the fixed seal in the joint, the irregular seal is pressed by the waterproof sheet, and the irregular seal is pressed on the back side of the waterproof sheet. It is arranged while being diffused. Thereby, the water stop performance is enhanced. As a result, water stopping can be appropriately performed while using a simple configuration.

  2nd invention has the projection part (37b, 51b) as a site | part which enters the back | inner side of the lower end part of the said fixed seal in the said joint, and the said water stop sheet | seat is characterized by the above-mentioned.

  According to the said structure, when affixing a water stop sheet | seat on the wall lower sheet | seat side, a water stop sheet | seat is affixed, aligning a projection part with respect to a joint. Thereby, alignment of a water stop sheet becomes easy and workability can be improved.

  A third aspect of the invention is characterized in that a lateral width dimension of the protruding portion is larger than a width dimension of the joint.

  Due to the fact that the width dimension of the protrusion is larger than the width dimension of the joint, the fixed seal is fitted into the joint after the waterproof sheet is attached to the under-wall sheet side during construction of the waterproof structure. Before, the protrusions warp toward the near side of the wall material. Therefore, it is suitable when performing the operation | work which fills an indefinite form seal in the back | inner side of a water stop sheet | seat.

  The fourth invention is characterized in that one surface of the water-proof sheet is an adhesive surface, and a portion of the adhesive surface that covers the amorphous seal is a non-adhesive portion.

  Since the portion that covers the amorphous seal is a non-adhesive portion on the adhesive surface of the waterproof sheet, the irregular seal can be suitably diffused when the irregular seal is pressed down by the waterproof sheet. In other words, if the amorphous seal is pressed down at the adhesive portion of the water-stop sheet, the irregular seal becomes difficult to diffuse due to adhering to the adhesive portion, but such inconvenience can be suppressed. At this time, by using the water-stop sheet as a receptacle when filling the irregular seal, it is possible to improve workability when performing the seal filling operation.

  According to a fifth aspect of the present invention, the waterproof sheet is provided on the outdoor side of the first sheet and the first sheet that is attached so as to straddle each of the lower wall sheets below the wall material. And a second sheet (37) having a portion that is attached in a state where the upper part protrudes upward from the first sheet and enters the back side of the lower end of the fixed seal in the joint. The irregular seal is provided between the first sheet and the second sheet.

  According to the said structure, the 2nd sheet | seat is affixed from the state in which the adjacent sheet | seat under a wall sheet was straddled by the 1st sheet | seat. In this case, the first sheet is attached first, so that the range of the gap between the sheet below the wall can be narrowed, and in that state, the filling of the irregular seal and the application of the second sheet can be performed. A configuration suitable for improving the water stopping performance between the sheets can be realized.

  In a sixth aspect of the present invention, in the building outer wall portion, the adjacent outer wall panels are joined together by connecting the vertical frame portions (26a) of the base frame, and the vertical frame portion includes a frame connecting portion. A water stop member (31) for stopping water is provided, the water stop member extends below the wall material on the outdoor side of the lower wall sheet, and the first sheet is located below the water stop member. The second sheet is provided so as not to overlap the water stop member, and is provided in a range including a portion between the water stop member and the first sheet.

  In the configuration in which the water stop member for stopping the frame connecting portion is provided in the vertical frame portion, and the water stop member extends below the wall material on the outdoor side of the lower wall sheet, the first sheet is the water stop member. By being provided so as not to overlap, lifting of the first sheet is suppressed. However, a pinhole is formed between the adjacent lower wall sheets in a portion between the water stop member and the first sheet, and there is a concern that the water stop may occur due to the pinhole. In this respect, since the second sheet is provided in a range including a portion between the water stop member and the first sheet, it is possible to suppress water stoppage due to the pinhole.

  7th invention has the bulging part (41b) which has the state which the said water stop sheet bulged to the outdoor side of the wall thickness direction in the state of sticking with respect to the said wall lower sheet | seat, The bulging part Is filled with the irregular shaped seal.

  By providing the bulging portion on the water-stop sheet, it is possible to suitably fill the irregular seal on the outdoor side of the under-wall sheet. In this case, an appropriate amount of the irregular seal can be disposed at an appropriate position. This is also a preferable configuration for performing the filling operation of the irregular seal.

  According to an eighth aspect of the present invention, the fixed seal has a hollow portion extending in a longitudinal direction, and upper and lower ends of the hollow portion are respectively opened, and the waterproof sheet has an upper portion at the lower end of the fixed seal. It is provided in a state of being pushed into the joint above the opening.

  In a configuration in which the fixed seal is provided with a hollow portion extending in the longitudinal direction, and the hollow portions are opened at the upper and lower ends, respectively, rainwater or the like is discharged through the hollow portion. In such a configuration, since the upper part of the water-stop sheet is provided in a state where it is pushed in above the lower end opening of the fixed seal, the lower end opening of the fixed seal is blocked by the amorphous seal. Inconveniences such as being lost can be suppressed.

The ninth invention
This is applied to a building outer wall (20) constituted by fixing a plurality of outer wall panels (24) having a wall member (25) and a base frame (26) side by side, and is formed between the adjacent wall members. A water stop treatment method for an outer wall joint that performs a water stop treatment on a joint (28),
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.
A sheet pasting process for pasting a water stop sheet (36, 37) to each lower wall sheet so as to straddle each adjacent lower wall sheet;
Thereafter, a filling process of filling an indefinite seal (38) from the outdoor side of the lower wall sheet below the joint formed between the wall materials in a state where the upper part of the waterproof sheet is drawn to the outdoor side; ,
Thereafter, the waterproofing sheet is placed in a state of covering the irregular seal from the outdoor side, and the mounting process of mounting the fixed seal (35) while pushing the upper part of the waterproof sheet into the back side of the joint, ,
It is characterized by providing.

  According to the water stop treatment method described above, the water stop sheet is attached to each wall lower sheet so as to straddle each wall lower sheet below the joint formed by the adjacent wall material, and the wall An irregular seal is filled from the outdoor side of the lower sheet. In particular, the waterproof sheet covers the amorphous seal from the outdoor side below the wall material, and the upper part is pushed into the back side of the lower end of the regular seal in the joint. In such a case, the sealing performance of the amorphous seal can be improved by covering the amorphous seal with the water-stop sheet. At this time, in a state where the upper part of the waterproof sheet is in the back side of the lower end of the fixed seal in the joint, the irregular seal is pressed by the waterproof sheet, and the irregular seal is pressed on the back side of the waterproof sheet. It is arranged while being diffused. Thereby, the water stop performance is enhanced. As a result, water stopping can be appropriately performed while using a simple configuration.

  In a tenth aspect of the invention, the sheet sticking process is a first process in which the first sheet (36) serving as the water-stop sheet is attached so as to straddle each of the lower wall sheets below the wall material. And a second process of attaching the second sheet (37) as the water-stop sheet on the outdoor side of the first sheet and with the upper part protruding upward from the first sheet. In the filling process, the irregular seal is filled in a state where the upper part of the second sheet is drawn to the outdoor side, and in the mounting process, the second sheet is covered from the outdoor side. In addition, the fixed seal is attached while pushing the upper portion of the second sheet into the back side of the joint.

  According to said water stop processing method, a 2nd sheet | seat is affixed from the state in which the space | interval between adjacent wall lower sheets was straddled by the 1st sheet | seat. In this case, the first sheet is attached first, so that the range of the gap between the sheet below the wall can be narrowed, and in that state, the filling of the irregular seal and the application of the second sheet can be performed. A configuration suitable for improving the water stopping performance between the sheets can be realized.

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. (A) is a front view which shows the water stop structure in the lower end part of a roof outer wall part, (b) is a longitudinal cross-sectional view of a joint part. The disassembled perspective view which decomposes | disassembles and shows each member which comprises a water stop structure. The disassembled perspective view which shows the detailed structure of an outer wall panel. Explanatory drawing which shows the manufacture procedure of a water stop structure. The front view of a seal cover. The front view which shows the state which affixed the waterproof tape on the sheet | seat under a wall. The perspective view which shows a water stop process in detail. The perspective view which shows the water stop structure in another example. The disassembled perspective view which decomposes | disassembles and shows each member which comprises a water stop structure in another example. The front view which shows another example of a seal cover.

  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 formed of a rectangular frame formed in a rectangular shape by, for example, channel 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 28 will be described by taking the vertical joint 28 of the roof outer wall portion 20b as an example. Fig.3 (a) is a front view which shows the water stop structure in the lower end part of the roof outer wall part 20b, FIG.3 (b) is a longitudinal cross-sectional view of a joint part. The portion shown in FIG. 3A corresponds to the portion A in FIG. FIG. 4 is an exploded perspective view showing each member constituting the water stop structure in an exploded manner. FIG. 5 is an exploded perspective view showing a detailed configuration of the outer wall panel 24.

  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 FIG. 5, in the outer wall panel 24, the vertical frame portion 26 a and the horizontal frame portion 26 b of the base frame 26 are each provided with a long water-stop member 31 made of a rubber material (sponge material) such as EPDM, for example. 32 is affixed. Of the water stop members 31 and 32, the water stop member 31 is attached to the outdoor side and the side of the vertical frame portion 26 a in an L-shaped cross section, and is provided so as to protrude slightly below the wall member 25. (Part B in the figure). More specifically, the lower end portion of the vertical frame portion 26a protrudes downward from the lower end of the wall member 25, and the water stop member 31 is attached so as to extend to the protruding portion.

  The horizontal frame portion 26 b is provided with a lower wall sheet 33 with an upper portion fixed to the back surface side of the wall member 25 and a lower portion hanging below the wall member 25. In the present embodiment, the under-wall sheet 33 is attached in a state of being sandwiched between the wall material 25 and the base frame 26 (specifically, the horizontal frame portion 26b). 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 outer wall panel 24. The water stop member 31 is provided on the surface side of the lower wall sheet 33. In the portion where these members 31, 33 overlap, the water stop member 31 is the front side (outdoor side), and the lower wall sheet 33 is the back side (indoor side). ).

  In the roof outer wall portion 20b, the adjacent outer wall panels 24 are coupled by connecting the vertical frame portions 26a. In the coupled state, the water blocking member 31 is provided between the adjacent vertical frame portions 26a. Are arranged in a crushed state (compressed state).

  As shown in FIG. 3, 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 25 and the back surface side of the wall material 22. Thereby, between these wall materials 22 and 25 is obstruct | occluded by the lower wall sheet | seat 33, and water, such as rain water, penetrates into the indoor side through between the wall materials 22 and 25.

  As shown in FIGS. 3 and 4, the vertical joint 28 and its peripheral part are subjected to a water stop treatment to prevent water from entering the indoor side through the vertical joint 28. Includes a water stop treatment above the lower end of the wall member 25 and a water stop treatment below the lower end of the wall member 25. Here, as the water stop treatment above the lower end of the wall member 25, the water stop member 31 is provided between the vertical frame portions 26a connected to each other as described above, and the front side thereof (that is, the outdoor side). A gasket 35 is provided as a fixed seal. The gasket 35 is formed long by an elastic material such as EPDM. The gasket 35 has a hollow portion extending in the longitudinal direction, and the hollow portion opens at the upper end and the lower end (see FIG. 9C). In the vertical joint 28, the gasket 35 serves as a primary seal, and the water stop member 31 serves as a secondary seal.

  In addition, as the water stop treatment below the lower end of the wall member 25, a water stop treatment is performed on the joining portion of the wall lower sheets 33 provided on each wall member 25. As an outline, a waterproof tape 36 and a seal cover 37 are attached to the joint portion between the adjacent lower wall sheets 33 from the outdoor side, and on the back side of the seal cover 37 and on the lower wall sheet 33. A silicon seal 38 as an indeterminate seal is provided at a portion including the lower end of the water stop member 31. In the present embodiment, the waterproof tape 36 corresponds to a “first sheet”, and the seal cover 37 corresponds to a “second sheet”.

  Next, the water stop structure of the vertical joint 28 will be described more specifically together with the manufacturing procedure. FIG. 6 is an explanatory diagram showing a manufacturing procedure of the water stop structure.

  FIG. 6A shows a state in which a plurality of outer wall panels 24 are installed in the roof portion 14, and there is a division between adjacent lower wall sheets 33 along the boundary of each outer wall panel 24.

  Then, as shown in FIG. 6B, the waterproof tape 36 is attached to the lower wall sheet 33 so as to straddle the adjacent lower wall sheet 33 (corresponding to “first process of sheet sticking process”). The waterproof tape 36 is an adhesive tape made of synthetic rubber such as butyl rubber, for example, and the entire surface of one surface is an adhesive surface. And the waterproof tape 36 is affixed on the lower wall sheet 33 so that the upper end of the waterproof tape 36 may be aligned with the lower end of the water stop member 31. As a result, the adjacent lower wall sheets 33 are integrated, and the space between the lower wall sheets 33 is closed below the water stop member 31. Prior to attaching the waterproof tape 36, for example, the back surface of the lower wall sheet 33 may be temporarily fixed with an adhesive tape piece.

  After that, as shown in FIG. 6C, a seal cover 37 is attached from the outdoor side to the protruding portion of the water blocking member 31 that extends downward from the wall material and the waterproof tape 36 (the “sheet attaching process first”). Equivalent to “2 treatment”). As with the waterproof tape 36, the seal cover 37 is made of synthetic rubber such as butyl rubber, for example. At this time, the sticking is performed in a state where the seal cover 37 is on the outdoor side of the waterproof tape 36 and the upper part protrudes upward from the waterproof tape 36. As shown in FIG. 7, the seal cover 37 has a shape having a rectangular main body portion 37a and a protrusion 37b protruding from the center of one side of the main body portion 37a. The lateral width L1 of the main body portion 37a is as follows. The dimension is smaller than the width of the waterproof tape 36 or the width of the waterproof tape 36. The seal cover 37 has an adhesive surface on one side, and at least a portion excluding the protruding portion 37b on the bonding surface is an adhesive portion N1, and a portion including the protruding portion 37b is a non-adhesive portion N2. In other words, the portion covering the silicon seal 38 on the bonding surface is a non-bonding portion N2.

  In the seal cover 37, the adhesive portion N <b> 1 is a portion that is attached to the waterproof tape 36 in an overlapping manner. The length L2 in the vertical direction of the non-adhesive portion N2 in the main body portion 37a is a size according to the distance from the upper end of the waterproof tape 36 to the lower end of the wall member 25, in other words, below the wall member 25. It is a dimension according to the protruding dimension of the water stop member 31, for example, a dimension slightly larger than the protruding dimension of the water stop member 31. Further, the protrusion dimension L3 of the protrusion 37b is larger than the thickness of the wall member 25, and the width L4 of the protrusion 37b is larger than the width of the vertical joint 28.

  Here, in the state in which the waterproof tape 36 is attached to the lower wall sheet 33, as shown in FIG. 8, there is a pinhole P due to the gap between the left and right lower wall sheets 33 between the water stop member 31 and the waterproof tape 36. There is concern about the formation, and the pinhole P may cause a decrease in water stopping performance. In view of this, the seal cover 37 is disposed at a position covering the pinhole P.

  If the waterproof tape 36 is attached so as to run on the water stop member 31, a pinhole may be formed due to the waterproof tape 36 being lifted due to the thickness of the water stop member 31. Concerned. Therefore, in order to make the gap between the left and right wall lower sheets 33 as small as possible and prevent the waterproof tape 36 from being lifted, the upper end of the waterproof tape 36 is aligned with the lower end of the water-stopping member 31, and the lower wall sheet It is desirable to attach a waterproof tape 36 to 33.

  Thereafter, as shown in FIG. 6 (d), the silicon seal 38 is filled between the waterproof tape 36 and the seal cover 37 (corresponding to “filling process”). The silicon seal 38 is made of, for example, a modified silicon sealant, is filled in a paste using a tool such as a seal gun G, and hardens as time passes.

  Details of the filling process will be described with reference to FIGS. In FIG. 9A, the seal cover 37 is stuck on the waterproof tape 36. At this time, the bonding portion N1 is bonded to the waterproof tape 36, whereas the non-bonding portion N2 is warped to the front side of the wall member 25. As described above, since the protrusion dimension L3 of the protrusion part 37b is larger than the thickness dimension of the wall material 25 and the horizontal width dimension L4 is larger than the width dimension of the vertical joint 28, the protrusion part 37b has the vertical joint 28. It protrudes to the near side rather than the surface of the wall material 25 without entering inside.

  Then, as shown in FIG. 9B, the silicon seal 38 is filled in the vicinity of the pinhole P in a state where the protrusion 37b of the seal cover 37 is picked with a finger and the non-adhesive portion N2 is drawn to the near side. At this time, since the upper part of the seal cover 37 is bent to the front side and the silicon seal 38 is filled thereon, the silicon seal 38 can be received by the seal cover 37, and the silicon seal 38 is dropped. It is suppressed.

  Thereafter, as shown in FIG. 6 (e), the gasket 35 is placed on the vertical joint 28 in a state where the silicon seal 38 is covered with the seal cover 37, that is, in a state where the silicon seal 38 is covered from the outdoor side below the wall material 25. Inserted and arranged (corresponding to “mounting process”). At this time, at the lower end portion of the vertical joint 28, the gasket 35 is fitted into the vertical joint 28 while pushing the protrusion 37 b of the seal cover 37 into the back side of the vertical joint 28. That is, in the state in which the gasket 35 is attached, the protrusion 37 b is disposed on the back side of the gasket 35 in the vertical joint 28.

  Here, when the gasket 35 is fitted, the gasket 35 is mounted while pressing the non-adhesive portion N2 of the seal cover 37 with the protrusion 37b of the seal cover 37 disposed on the back side of the gasket 35. Thereby, the silicon seal 38 is diffused in the surface direction between the waterproof tape 36 and the seal cover 37. Specifically, the silicon seal 38 is diffused as shown in FIG. At this time, since the silicon seal 38 is filled on the back side of the non-bonded portion N2 of the seal cover 37, the problem that the cover bonded portion hinders the diffusion of the silicon seal 38 is suppressed.

  Further, since the silicon seal 38 protrudes outside the seal cover 37 (C portion in the figure), the silicon seal 38 is widely present in a predetermined range, and water stoppage by the silicon seal 38 is achieved. Can be confirmed. At this time, the lower end of the gasket 35 is an open end of the hollow portion. However, when the protrusion 37 b of the seal cover 37 enters the vertical joint 28, the gasket 35 is sealed by the silicon seal 38 on the back side of the seal cover 37. The inconvenience that the opening end of the plug is blocked is not caused.

  In the seal cover 37, an extended portion 37c is formed at the base portion of the protruding portion 37b, and the extended portion 37c suppresses leakage of the silicon seal 38 from the back side of the seal cover 37 to the gasket 35 side. It is like that.

  Thus, as shown in FIG. 6 (f), the water stop process above the lower end of the wall member 25 and the water stop process below the lower end of the wall member 25 are completed.

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

  In the joint structure described above, the waterproof tape 36 and the seal cover 37 are provided on the lower wall sheets 33 so as to straddle the lower wall sheets 33 below the vertical joints 28 formed by the adjacent wall members 25. While being affixed, a silicon seal 38 is provided from the outdoor side of the lower wall sheet 33. In particular, the seal cover 37 is provided in a state in which the silicon seal 38 is covered from the outdoor side below the wall material 25 and the upper part enters the back side of the lower end of the gasket 35 in the vertical joint 28. In such a case, the silicon seal 38 is covered with the seal cover 37, so that the sealing performance by the silicon seal 38 can be improved. At this time, in a state where the upper portion of the seal cover 37 enters the back side of the lower end portion of the gasket 35 in the vertical joint 28, the silicon seal 38 is pressed by the seal cover 37, and the silicon seal 38 is the back surface of the seal cover 37. It is arranged while being diffused on the side. Thereby, the water stop performance is enhanced. As a result, water stopping can be appropriately performed while using a simple configuration.

  The seal cover 37 has a protruding portion 37 b as a portion that enters the back side of the lower end portion of the gasket 35 in the vertical joint 28. Therefore, when the seal cover 37 is attached to the lower wall sheet 33 side, the seal cover 37 is attached while aligning the protrusions 37 b with respect to the vertical joints 28. Thereby, the alignment of the seal cover 37 is facilitated, and the workability can be improved.

  Since the width L4 of the protrusion 37b of the seal cover 37 is larger than the width of the vertical joint 28, the seal cover 37 is attached to the side of the lower wall sheet 33 when the waterproof structure is constructed. In addition, before the gasket 35 is fitted into the vertical joint 28, the protrusion 37b warps toward the front side of the wall member 25. Therefore, it is suitable for performing the work of filling the silicon seal 38 in the back side of the seal cover 37.

  Since the portion covering the silicon seal 38 on the adhesive surface of the seal cover 37 is the non-adhesive portion N2, the silicon seal 38 can be suitably diffused when the silicon seal 38 is pressed by the seal cover 37. In other words, if the silicon seal 38 is pressed by the adhesive portion of the seal cover 37, the silicon seal 38 adheres to the adhesive portion, making it difficult to diffuse, but such inconvenience can be suppressed. Further, at this time, by using the seal cover 37 as a receptacle when filling the silicon seal 38, it is possible to improve workability when performing the seal filling operation.

  Since the portion including the part that enters the vertical joint 28 on the adhesive surface of the seal cover 37 is the non-adhesive portion N2, the silicon seal 38 is not filled when the silicon seal 38 is filled after the seal cover 37 is attached. It is possible to suppress the inconvenience that the sheet is inadvertently attached to the lower wall sheet 33 and the filling operation becomes difficult.

  A waterproof tape 36 (first sheet) and a seal cover 37 (second sheet) are used as a water-stop sheet, and a seal is provided from above with the waterproof tape 36 between adjacent wall lower sheets 33. The cover 37 is attached. In this case, the waterproof tape 36 is applied first, so that the range of the gap between the wall lower sheets 33 is narrowed, and in this state, the filling of the silicon seal 38 and the application of the seal cover 37 can be performed. A configuration suitable for improving the water stopping performance between the lower sheets 33 can be realized.

  In the configuration in which the vertical frame portion 26 a is provided with a water stop member 31 for stopping the frame connecting portion, and the water stop member 31 extends below the wall member 25 on the outdoor side of the wall lower sheet 33. By providing 36 so as not to overlap the water stop member 31, lifting of the waterproof tape 36 is suppressed. However, a pinhole P is formed between the adjacent lower wall sheets 33 in a portion between the waterstop member 31 and the waterproof tape 36, and there is a concern that the pinhole P may cause water cutout. In this respect, since the seal cover 37 is provided in a range including a portion between the water stop member 31 and the waterproof tape 36, the water stop due to the pinhole P can be suppressed.

  In the configuration in which the hollow portions of the gasket 35 are opened at the upper and lower ends, the seal cover 37 is provided in a state of being pushed in above the lower end opening of the gasket 35. Therefore, the seal cover 37 can suppress the disadvantage that the lower end opening of the gasket 35 is blocked by the silicon seal 38.

  At the time of building production at the building construction site, a first process for applying the waterproof tape 36, a second process for applying the seal cover 37, a filling process for filling the silicon seal 38, and a mounting process for mounting the gasket 35 are sequentially performed. Thus, the water stop structure having the above-described configuration was constructed. In this case, construction of an appropriate water stop structure at the vertical joint 28 can be realized.

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

  The seal cover may have a bulging portion that bulges in the wall thickness direction in a state of being attached to the underwall sheet 33, and the bulging portion may be filled with an irregular seal. Its specific configuration is shown in FIG. In FIG. 10, in the seal cover 41 as the second sheet, a knob 41a and a bulging portion 41b are provided vertically at the center in the left-right direction. The knob 41a forms the bottom of the bulging portion 41b, and the bulging portion 41b is formed on the knob 41a so as to bulge to the outdoor side. A silicon seal 38 is filled in the bulging portion 41b. The seal cover 41 is preferably provided with a cut in the vertical direction at a position where the knob 41a is formed, and the knob 41a can be easily formed by the cut. In addition, although illustration is abbreviate | omitted, the seal cover 41 has the adhesion part N1 and the non-adhesion part N2 similarly to the above-mentioned seal cover 37. FIG.

  By providing the bulging portion 41 b in the seal cover 41, it is possible to suitably fill the silicon seal 38 on the outdoor side of the lower wall sheet 33. In this case, an appropriate amount of the silicon seal 38 can be disposed at an appropriate position. Therefore, it is a suitable configuration for filling the silicon seal 38.

  Note that the width of the seal cover 41 in the state before being attached is larger than that of the waterproof tape 36, and the bulging portion 41b is formed by pinching the center portion in the left-right direction, so that the width of the seal cover 41 is the same as that of the waterproof tape 36. It should be the same. In this case, the surplus margin of the seal cover 41 with respect to the waterproof tape 36 is a measure of how much the seal cover 41 is to be picked when forming the bulged portion 41b.

  In the above embodiment, the waterproof tape 36 (first sheet) and the seal cover 37 (second sheet) are used as the waterproof sheet, but this is changed to use a single waterproof sheet. Also good. FIG. 11 is a configuration diagram when one water-stop sheet 51 is used. In the configuration of FIG. 11, the waterproof sheet 51 is attached to each of the lower wall sheets 33 so as to straddle the adjacent lower wall sheets 33, and the back side of the waterproof sheet 51, that is, the lower wall sheet. A silicon seal 38 is provided on the outdoor side of 33. In this case, the silicon seal 38 is covered from the outdoor side by the waterproof sheet 51 below the wall material 25. Further, the waterproof sheet 51 has a main body 51 a and a protrusion 51 b, and the protrusion 51 b is provided in a state where the protrusion 51 b enters the back side of the lower end portion of the gasket 35 in the vertical joint 28. In addition, although illustration is abbreviate | omitted, the water stop sheet | seat 51 has the adhesion part N1 and the non-adhesion part N2 similarly to the above-mentioned seal cover 37. FIG.

As a still water treatment method in the configuration of FIG.
(1) a sheet pasting process for pasting the water stop sheet 51 on each of the lower wall sheets 33 so as to straddle the adjacent lower wall sheets 33;
(2) After that, in a state where the upper part of the water stop sheet 51 is drawn to the outdoor side, a filling process for filling the silicon seal 38 from the outdoor side of the lower wall sheet 33 below the vertical joint 28;
(3) Thereafter, the waterproof sheet 51 is brought into a state in which the silicon seal 38 is covered from the outdoor side, and the gasket 35 is inserted while pushing the upper part (protrusion 51b) of the waterproof sheet 51 into the back side of the vertical joint 28. Installation process to install,
It has.

  Also in the said structure, water stop can be appropriately performed similarly to the above, using a simple structure.

  -You may comprise the seal cover 37 as a water stop sheet | seat with a transparent or semi-transparent base material. According to such a configuration, after filling the silicon seal 38, the silicon seal 38 on the back side can be visually confirmed through the seal cover 37 with the seal cover 37 placed on the silicon seal 38. Therefore, after the silicon seal 38 is filled, it is possible to easily check the presence of the silicon seal 38, check the filling amount of the silicon seal 38, and check the diffusion range of the silicon seal 38. In addition, the state of the silicon seal 38 can be easily confirmed through the seal cover 37 even during maintenance after building construction. Similarly, the waterproof tape 36 may be formed of a transparent or translucent substrate.

  Note that the seal cover 37 is transparent or semi-transparent as long as the silicon seal 38 on the back side can be seen through the seal cover 37 and may be either colorless or colored.

  In addition, as shown in FIG. 11, in the configuration using one water-stop sheet 51, the water-stop sheet 51 can be formed of a transparent or translucent substrate.

  -A seal cover is not limited to the shape which has a projection part in the upper part. For example, the seal cover 61 shown in FIG. 12 has a rectangular shape as a whole, and a pair of cuts 62 are provided on one side thereof (the upper portion in the attached state). The pair of cuts 62 may be either parallel or non-parallel. Further, the pair of cuts 62 is not limited to a straight line but may be a curved line. A portion 63 entering the vertical joint 28 is formed between the pair of cuts 62. The seal cover 61 has one surface as an adhesive surface, and a portion including at least the portion 63 on the adhesive surface is a non-adhesive portion N2. Further, the seal cover 61 has a non-adhesive portion N2 at a portion covering the silicon seal 38 on the adhesive surface.

  In the above embodiment, the water stop member 31 is provided so as to protrude slightly downward from the wall member 25 (see FIGS. 4 and 5), but this is changed so that the water stop member 31 is replaced with the wall member. You may provide without protruding below 25. In this case, the water stop member 31 may be provided in a range up to the same position as the lower end of the wall member 25. Alternatively, the water stop member 31 may be provided in a range slightly above the lower end of the wall member 25. In any case, the water stopping performance can be enhanced by the diffusion of the silicon seal 38.

  -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 28 in the vicinity of the boundary between the main body outer wall portion 20a and the roof outer wall portion 20b, but also to other locations. For example, the water stop structure of the present invention may be applied to the vertical joint 27 near the boundary between the upper floor portion and the lower floor 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.

  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, 24 ... Outer wall panel, 25 ... Wall material, 26 ... Base frame, 28 ... Vertical joint, 31 ... Water stop member, 33 ... Under-wall sheet, 35 ... Gasket (standard seal), 36 ... Waterproof tape (waterproof sheet, first sheet), 37 ... Seal cover (waterproof sheet, second sheet), 37b ... Projection, 38 ... Silicon seal (unshaped seal), 41 ... Seal cover (waterproof sheet) , 2nd sheet), 41b ... bulging part, 51 ... water stop sheet, 51b ... projection part.

Claims (10)

Applied to a building outer wall portion configured by fixing a plurality of outer wall panels having a wall material and a base frame side by side, and a joint water-stop structure formed between the adjacent wall materials,
An upper wall is fixed between the wall material and the base frame, and a lower wall is provided below the wall material so as to hang down from the wall material, and
An indeterminate seal provided from the outdoor side of the lower wall sheet below the joint formed between the wall materials;
A waterproof sheet attached to each of the wall lower sheets so as to straddle the wall lower sheets of the adjacent wall materials; and
A fixed seal provided on the joint;
With
The water stop sheet is provided in a state in which the non-uniform seal is covered from the outdoor side below the wall material, and the upper part of the waterproof sheet enters the back side of the lower end of the fixed seal in the joint. The water-stop structure of the outer wall joint that is characteristic.   2. The water stop structure for an outer wall joint according to claim 1, wherein the water stop sheet has a protrusion as a portion that enters the back side of the lower end of the fixed seal in the joint.   The water stop structure of the outer wall joint according to claim 2, wherein a lateral width dimension of the protrusion is larger than a width dimension of the joint.   4. The water-stop sheet according to claim 1, wherein one surface is an adhesive surface, and a portion of the adhesive surface that covers the amorphous seal is a non-adhesive portion. 5. Water stop structure of the outer wall joint. The waterproof sheet is
A first sheet that is pasted so as to straddle each lower wall sheet below the wall material;
The second sheet has a portion that is on the outdoor side of the first sheet and has a portion that enters the back side of the lower end portion of the fixed seal in the joint, with the upper portion protruding beyond the first sheet. Sheet,
Have
The water stop structure for an outer wall joint according to any one of claims 1 to 4, wherein the irregular seal is provided between the first sheet and the second sheet. In the building outer wall portion, the adjacent outer wall panels are joined together by connecting the vertical frame portions of the base frame, and the vertical frame portion is provided with a water stop member for stopping the frame connecting portion. The water stop member extends below the wall material on the outdoor side of the wall lower sheet,
The first sheet is provided below the water stop member so as not to overlap the water stop member,
The water stop structure of the outer wall joint according to claim 5, wherein the second sheet is provided in a range including a portion between the water stop member and the first sheet.   The waterproof sheet has a bulging portion that is in a state of bulging to the outdoor side in the wall thickness direction in a state of being attached to the under-wall sheet, and the bulging portion is filled with the irregular seal. The water stop structure of the outer wall joint according to any one of claims 1 to 6. The fixed seal has a hollow portion extending in the longitudinal direction, and upper and lower ends of the hollow portion are respectively opened,
The said water stop sheet | seat is provided in the state by which the upper part was pushed in in the said joint above the lower end opening of the said fixed seal, The any one of Claim 1 thru | or 7 characterized by the above-mentioned. Water stop structure of the outer wall joint. An outer wall that is applied to a building outer wall portion formed by fixing a plurality of outer wall panels having a wall material and a base frame side by side, and that performs a water stop treatment on a joint formed between the adjacent wall materials. A water-stop treatment method for joints,
The outer wall panel includes a lower wall sheet 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.
Sheet pasting process for pasting a water stop sheet to each of the lower wall sheets so as to straddle each adjacent lower wall sheet,
Then, in a state where the upper part of the water-stop sheet is drawn to the outdoor side, a filling process for filling an amorphous seal from the outdoor side of the lower wall sheet below the joint formed between the wall materials;
After that, the water stop sheet is in a state of covering the irregular seal from the outdoor side, and the mounting process of mounting the fixed seal while pushing the upper part of the water stop sheet into the back side of the joint,
A water-stopping method for an outer wall joint characterized by comprising: The sheet sticking process is
A first treatment for sticking the first sheet as the water stop sheet so as to straddle each lower wall sheet below the wall material;
A second treatment for sticking the second sheet as the water-stop sheet on the outdoor side of the first sheet and with the upper portion protruding above the first sheet;
Have
In the filling process, the irregular seal is filled in a state where the upper part of the second sheet is drawn to the outdoor side,
In the mounting process, the second sheet is placed in a state of covering the irregular seal from the outdoor side, and the fixed seal is mounted while pushing the upper part of the second sheet into the back side in the joint. The water stop processing method of the outer wall joint according to claim 9.

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