JP2017008627A - Water stop structure of the outer wall joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water cut-off structure for an exterior wall joint that prevents blowing in of rainwater into a building along a water cut-off sheet, in a joint that suppresses water infiltration to an indoor side with the water cut-off sheet.SOLUTION: A gasket 54 is disposed between substrate frames 42 of a joint 32 between adjacent exterior wall panels 31. A water cut-off sheet 56 is spanned over the joint 32 between the adjacent exterior wall panels 31, the water cut-off sheet 56 being fixed on each of the exterior wall panels 31 while being tucked between an exterior wall surface material 41 and the substrate frame 42. The water cut-off sheet 56 forms a cover part 58 that covers a bottom edge side of the gasket 54 from an indoor side while being inserted between the substrate frames 42, and a guide part 59 that guides water flowing down from the bottom edge of the gasket 54 toward an outdoor side of the gasket 54. A water cut-off member 65 is provided between the gasket 54 and the cover part 58, for closing a gap 63 therebetween.SELECTED DRAWING: Figure 7

Description

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

  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 an outer wall surface material and a base frame provided on the indoor side of the outer wall surface 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 (see, for example, Patent Document 1).

  As such a water stop seal, for example, a gasket that extends vertically may be disposed between the base frames in the joint. In this case, the gasket prevents water from entering the indoor side, but the water flows along the gasket and eventually flows downward from the lower end of the gasket. For this reason, there is a concern about the inconvenience that the dropped water enters the indoor side and wets the building.

  Therefore, as a countermeasure against such a problem, a water stop structure has been proposed in which water flowing down from the lower end of the gasket is received by a water stop sheet and guided to the outdoor side. In such a water stop structure, the water stop sheet is bridged between adjacent outer wall panels in a state of straddling the joint, and is fixed in a state sandwiched between the outer wall surface material and the base frame in each of the outer wall panels. And the intermediate part of the left-right direction in a water stop sheet | seat is provided in the state which entered between base frames from the outdoor side in the joint. In this case, a covering portion that covers the lower end side of the gasket from the indoor side and a guide portion that is provided below the gasket and guides the water flowing down from the lower end of the gasket to the outdoor side are formed by the entering portion. According to such a water stop structure, since the water flowing down from the lower end of the gasket can be guided to the outdoor side and discharged, the water flowing down can be prevented from entering the indoor side.

JP 2014-177772 A

  By the way, in the water stop structure mentioned above, there is a possibility that rain water may blow up along the water stop sheet when there is rainfall with strong wind outdoors. In that case, there is a risk that rainwater will blow into the building through the gap between the gasket and the cover of the waterproof sheet.

  The present invention has been made in view of the above circumstances, and has a configuration in which water intrusion into the indoor side is suppressed by a waterproof sheet at a joint, and rainwater is blown into a building along the waterproof sheet The main purpose is to provide a water-stopping structure for the outer wall joint that can prevent the above-described problem.

  In order to solve the above-described problem, the water stop structure of the outer wall joint of the first invention is provided with a plurality of side wall panels having an outer wall surface material and a base frame provided on the indoor side of the outer wall surface material, In the joint between the adjacent outer wall panels, a gasket that extends vertically along the joint is a water stop structure of the outer wall joint disposed between the base frames, and straddles the joint The waterproof sheet is bridged between the outer wall surface material and the base frame in each of the outer wall panels. A cover portion that covers at least a lower end portion of the gasket from the indoor side in a state of being inserted between the base frames from the outdoor side at the joint by the waterproof sheet, and the gasket. And a guide portion that guides water that has flowed down from the lower end of the gasket to the outside of the gasket, and a gap between the gasket and the cover portion is formed between the gasket and the cover portion. A water-stopping member is provided to block the water.

  According to the present invention, the gap between the gasket and the cover portion of the water-stop sheet that covers the gasket from the indoor side is blocked by the water-stop member. Can be prevented from blowing into the building through the gap. Thereby, it is in the structure which suppressed the permeation of the water to the indoor side with the water stop sheet | seat, and the blowing of rain water into the building along a water stop sheet | seat can be prevented.

  In the water stop structure of the outer wall joint of the second invention, in the first invention, the gap between the gasket and the cover portion extends in the vertical direction, and the water stop member is in the vertical direction in the gap. It arrange | positions only to a part of.

  According to the present invention, since the water stop member is disposed only in a part in the vertical direction in the gap between the gasket and the cover portion, the water stop member can be formed with a relatively small vertical width. . Thereby, the operation | work which pushes and arrange | positions a water stop member in a joint can be made easy.

  The water stop structure of the outer wall joint of the third invention is characterized in that, in the second invention, the water stop member is disposed at an upper end portion of the gap.

  According to the present invention, since the water stop member is arranged at the upper end portion in the gap between the gasket and the cover portion, when rainwater blows into the gap from below, the water moves up the gap. After flowing, water is stopped at the water stop member. In this case, since the momentum of the upward water flow is reduced in the gap, the water stop member performs water stop, so that it is possible to suitably prevent water from entering the building.

  The water stop structure of the outer wall joint of the fourth invention is any one of the first to third inventions, wherein the guide portion has a guide surface for receiving and guiding water that has flowed down from the gasket, and the guide surface. Is an inclined surface inclined downward toward the outdoor side, and the inclined surface is formed across the cover portion and the guide portion, and is in contact with the lower end of the gasket in the middle thereof It is characterized by that.

  According to the present invention, the guide surface that receives the water flowing down from the gasket in the guide portion and guides it to the outdoor side is an inclined surface that is inclined downward toward the outdoor side, and the inclined surface is formed between the cover portion and the guide portion. It is formed straddling. In this case, since the inclined surface is in contact with the lower end of the gasket in the middle thereof, the gap between the gasket and the cover portion is closed (or almost closed) at the lower end of the gasket. Thereby, since it is possible to suppress the entry of water into the gap from below, it is possible to more reliably prevent water from being blown into the building through the gap.

  The water stop structure of the outer wall joint of the fifth invention is the water stop structure according to any one of the first to fourth inventions, wherein the water stop member is formed of an elastic material, and the gap between the gasket and the cover portion is the same. It is arranged in a state of being compressed indoors and outdoors in the gap.

  In the above-described configuration in which the water-stop sheet is sandwiched and fixed between the outer wall surface material and the base frame, it is assumed that the size of the sandwiching allowance varies. In that case, it is assumed that the penetration dimension of the cover portion into the joint joint varies, and consequently, the gap between the cover portion and the gasket varies. In that respect, in the present invention, since the water stop member is disposed in a state compressed in the indoor and outdoor directions in the gap between the gasket and the cover portion, the variation occurring in the gap is absorbed by the compression of the water stop member. Can do. Thereby, the water stop function by a water stop member can be exhibited reliably irrespective of the dispersion | variation in a clearance gap.

  The water stop structure of the outer wall joint of the sixth invention is the fifth invention, wherein the sheet material is fixed to the adjacent outer wall panels sandwiched between the outer wall surface material and the base frame, respectively. In addition, in each sheet material of the adjacent outer wall panels, the water-stopping sheet is configured by bonding and connecting portions protruding to the joint side to each other at the joint.

  According to the present invention, after the outer wall panels are installed side by side, the sheet materials of the adjacent outer wall panels are bonded together and connected, and the connecting portion is pushed into the joint to form the cover portion and the guide portion. A water sheet can be constructed. As a result, it is possible to relatively easily provide the waterproof sheet between the outer wall panels.

  By the way, in such a configuration, when the sheet materials are bonded together, it is assumed that the size of the bonding margin varies. In that case, it is assumed that the penetration dimension of the cover portion into the joint joint varies, and consequently, the gap between the cover portion and the gasket varies. In that respect, in the present invention, since the variation generated in the gap can be absorbed by the compression of the water stop member, the water stop function by the water stop member can be surely exhibited regardless of the gap variation.

  The water stop structure of the outer wall joint of the seventh aspect of the invention is the sixth invention, wherein the sheet materials are different from each other in projecting dimensions from the outer wall panel to the joint side, The water stop member is fixed to a sheet material having a larger protruding dimension.

  According to the present invention, when bonding each sheet material of the adjacent outer wall panel in a state of being pulled out from the joint to the outdoor side, the sheet material on the side having a large protruding dimension to the joint side is bent into a U-shape, etc. Both sheet materials can be bonded together. For example, if the protruding dimensions of both sheet materials are the same, it is necessary to bond both sheet materials by bending them inward, etc., but in the above configuration where the protruding dimensions of both sheet materials are different, It is sufficient to bend only the sheet material on the side having a large protruding dimension. Therefore, it becomes possible to perform the bonding operation relatively easily.

  The water stop structure of the outer wall joint of the eighth invention is any one of the first to seventh inventions, wherein the region on the indoor side of the cover portion between the base frames of the adjacent outer wall panels is the indoor / outdoor region. The length of the direction is smaller than the joint width of the joint.

  By the way, between the base frames of the adjacent outer wall panels, a member for sandwiching the cover portion between the gasket and the gasket is provided in a region closer to the indoor side than the cover portion, thereby creating a gap between the gasket and the cover portion. It can be considered not to let them. Also in this case, it is possible to prevent water from being blown into the building through between the gasket and the cover. However, when the thickness of the base frame (the length in the indoor / outdoor direction) is small, the indoor area cannot be sufficiently secured, and it is difficult to provide a sandwiching member in the indoor area. . Therefore, in view of this point, the present invention has a configuration in which the indoor area cannot be sufficiently secured, specifically, a configuration in which the length in the indoor / outdoor direction in the same area is smaller than the joint width. Has been applied. In this case, even when it is difficult to provide a sandwiching member in the indoor area, it is possible to prevent water from being blown into the building.

  The water stop structure of the outer wall joint of the ninth invention is the rectangular parallelepiped frame having a beam and a column in any one of the first to eighth inventions, and the outer wall panel provided on the side of the frame. Applied to a unit-type building in which a plurality of building units are connected to each other, and a gap between the gasket and the covering portion is closed by the water-stopping member at a joint between the outer wall panels of adjacent building units. It is characterized by peeling.

  It is considered difficult to dispose the above-described sandwiching member between the base frames at the joint between the outer wall panels of adjacent building units. In that respect, in the present invention, since the water stop structure of the first invention is applied to the joint between the building units, it is possible to suitably prevent water from being blown into the building at the joint. .

The perspective view which shows the outline | summary of a unit type building. The perspective view which shows a building unit. The front view which shows the lower end part periphery of an outer wall part. The front view which shows the structure of an adjacent outer wall panel. AA line sectional view of Drawing 3. The longitudinal cross-sectional view which shows the water stop structure of a joint. The cross-sectional view which shows the water stop structure of a joint. The cross-sectional view shown in the state which decomposed | disassembled the water stop structure of a joint. The figure for demonstrating the work procedure at the time of performing a water stop process with respect to a joint.

  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, and FIG. 2 is a perspective view showing the building unit.

  As shown in FIG. 1, the building 10 includes a building body 12 provided on a foundation 11 and a roof portion 13 provided above the building body 12. The building body 12 is a two-story building having a first-floor portion 14 and a second-floor portion 15, and is configured by connecting a plurality of building units 20 to each other. The building unit 20 is manufactured in advance in a manufacturing factory, and then transported to a construction site by a truck or the like. The roof portion 13 is configured as a gable roof.

  A balcony 16 is provided on the second floor portion 15 of the building 10. The balcony 16 is provided over a plurality of building units 20 provided on the first floor portion 14. That is, the balcony 16 is a so-called roof balcony. The balcony 16 includes a balcony floor 18 and a balcony waist wall 19 standing on the peripheral edge of the balcony floor 18. The balcony waist wall portion 19 is disposed on three sides of the balcony 16, and an outer wall portion 17 is provided on the other side. The outer wall portion 17 is formed across the side surface portions of the plurality of building units 20 provided on the second floor portion 15. In this case, the space surrounded by the balcony floor 18, the balcony waist wall 19, and the outer wall 17 is a balcony space BS.

  Next, the configuration of the building unit 20 will be described. FIG. 2 is a perspective view showing the building unit 20. As shown in FIG. 2, the building unit 20 includes four columns 21 disposed at the four corners thereof, and four ceiling beams 22 and floor beams 23 that connect the upper end portion and the lower end portion of each column 21, respectively. And. A rectangular frame (frame) is formed by the pillars 21, the ceiling beams 22 and the floor beams 23. The column 21 is made of square tubular square steel, and the ceiling girder 22 and floor girder 23 are made of channel steel having a U-shaped cross section.

  A plurality of small ceiling beams 25 are bridged between the large ceiling beams 22 on the long sides of the building unit 20 at predetermined intervals. Similarly, a plurality of floor beams 26 are bridged between the large floor beams 23 on the long sides of the building unit 20 at predetermined intervals. The ceiling beam 25 and the floor beam 26 are provided at the same interval and at positions corresponding to the upper and lower sides, respectively. For example, the ceiling beam 25 is made of lip groove steel, and the floor beam 26 is made of square steel. The ceiling member 27 is supported by the ceiling beam 25 and the floor member 28 is supported by the floor beam 26.

  Next, the configuration around the lower end of the outer wall 17 will be described with reference to FIGS. 3 is a front view showing the vicinity of the lower end portion of the outer wall portion 17, FIG. 4 is a front view showing the configuration of adjacent outer wall panels 31, and FIG. 5 is a cross-sectional view taken along line AA of FIG. 3, the base frame 42 disposed on the back side of the outer wall surface material 41 is indicated by a broken line, and in FIG. 4, the portion disposed on the back side of the outer wall surface material 41 in the lower wall sheet 51 and the sheet material 61. Is indicated by a broken line. In FIG. 4, the adjacent outer wall panels 31 are not fixed to the building 10.

  As shown in FIGS. 3 to 5, the outer wall portion 17 has a plurality of outer wall panels 31 provided side by side. The outer wall panel 31 includes an outer wall surface material 41 that forms an outdoor surface (outer wall surface) of the outer wall portion 17, and a base frame 42 provided on the indoor side of the outer wall surface material 41. The outer wall surface material 41 is formed in a rectangular plate shape by an exterior material such as a ceramics siding board.

  The base frame 42 has vertical frame members 42a and 42b extending in the vertical direction and horizontal frame members 42c extending in the left-right direction (see FIG. 3), and the frame members 42a to 42c are combined with each other. It is configured. A plurality of the vertical frame members 42a and 42b are provided at a predetermined interval in the width direction of the outer wall surface material 41, the vertical frame material 42a is disposed at an intermediate portion in the width direction of the outer wall surface material 41, and the vertical frame member 42b is the outer wall surface material. 41 is disposed at the end in the width direction. The vertical frame material 42a is formed of a steel material having a U-shaped cross section, and the vertical frame material 42b is formed of a steel material having an L-shaped cross section (see FIG. 7). Moreover, the horizontal frame material 42c is provided in the upper end part and lower end part of the outer wall surface material 41, respectively, and is formed with the steel material of a cross-sectional U-shape.

  The foundation frame 42 is fixed to the floor girder 23, the ceiling girder 22 (not shown) and the column 21 (see FIG. 7) of the building unit 20 by bolts or the like. Thereby, the outer wall panel 31 is attached to the side surface of the building unit 20. In addition, the outer wall panel 31 is assembled | attached to the building unit 20 previously in a manufacturing factory.

  A base frame 33 is provided below the outer wall portion 17. The base frame 33 has a long shape extending in the width direction of the outer wall portion 17 and is formed of, for example, a steel material having a rectangular cross section. The base frame 33 is provided in a state of protruding upward from the balcony floor 18, and the protruding portion serves as a rising portion 33 a. The base frame 33 is fixed to the large floor beam 23 of the building unit 20 via an attachment member (not shown).

  The balcony floor 18 includes a floor base material 45 supported by a balcony floor beam (not shown), a floor heat insulating material 46 provided on the floor base material 45, and a waterproof plate 47 laid on the floor heat insulating material 46. And have. The floor base material 45 is formed of ALC (lightweight cellular concrete) or the like, and the floor heat insulating material 46 is formed of a foamed heat insulating material such as hard urethane foam. The waterproof plate 47 is formed of a steel plate provided with a water-resistant film (for example, a vinyl chloride film), and a part of the waterproof plate 47 rises along the outdoor side surface of the base frame 33 (rise part 33a). It has become. The waterproof plate 47 constitutes a waterproof layer in the balcony floor 18, and the base frame 33 is a waterproof base that supports the rising portion of the waterproof layer.

  As shown in FIGS. 3 to 5, a lower wall sheet 51 is attached to the lower end portion of the outer wall panel 31. The under-wall sheet 51 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 31. The lower wall sheet 51 is attached with its upper part sandwiched between the outer wall surface material 41 of the outer wall panel 31 and the base frame 42 (specifically, the horizontal frame material 42c at the lower end of the frame), and its lower part is the outer wall panel. It hangs down below 31 and overlaps the outdoor side surface of the rising portion 47 a of the waterproof plate 47. In this case, the lower wall sheet 51 is in a state of being stretched up and down between the outer wall panel 31 and the rising portion 47a of the waterproof board 47, whereby the space between the two members 31, 47a is between the lower wall sheet 31 and 47a. It is blocked by 51. Thereby, water such as rainwater is prevented from entering the indoor side through between the rising portion 33a of the base frame 33 and the outer wall panel 31.

  A joint 32 (vertical joint) extending in the vertical direction is formed between the adjacent outer wall panels 31. The joint 32 is subjected to a water stop treatment so as to prevent water from entering the indoor side through the joint 32. In the following, this water stop structure will be described with reference to FIGS. 6 to 8 in addition to FIG. 6 is a vertical cross-sectional view showing the water stop structure of the joint 32, and FIG. 7 is a cross-sectional view showing the water stop structure of the joint 32. As shown in FIG. FIG. 8 is a cross-sectional view showing the water stop structure of the joint 32 in an exploded state. 6 corresponds to the sectional view taken along the line BB in FIG. 3, and FIGS. 7 and 8 correspond to the sectional view taken along the line CC in FIG.

  3 and 6 to 8 show joints 32 between the outer wall panels 31 of adjacent building units 20, and in the following, referring to these FIGS. The water stop structure will be described.

  As shown in FIGS. 3 and 6 to 8, at the boundary between the outer wall panels 31 of the adjacent building units 20, between the outer wall surface materials 41 of the outer wall panels 31 and between the base frames 42. Predetermined gaps are respectively formed, and the joints 32 are formed by these gaps. In this case, the base frames 42 are arranged so that the vertical frame members 42b are adjacent to each other, and a joint 32 (a part thereof) is formed between the vertical frame members 42b. Each of the vertical frame members 42b has an L-shaped cross section as described above, and the mounting plate portion 43 attached to the indoor side surface of the outer wall surface material 41 and the opposing plate portion 44 that face each other across the joint 32. And have. A bracket 49 is fixed to the outer surface (surface opposite to the joint 32) of the counter plate portion 44, and the bracket 49 is fixed to the side surface of the column 21. In this case, the vertical frame member 42b and the base frame 42 are fixed to the pillar 21 via the bracket 49.

  Gaskets 53 and 54 are provided in the joint 32 to prevent water from entering the back side. Two gaskets 53 and 54 are arranged indoors and outdoors at a predetermined interval in the joint 32, and both gaskets 53 and 54 are provided so as to extend vertically along the joint 32. That is, in this embodiment, the double seal structure is adopted as the water stop treatment of the joint 32, and the water stop effect at the joint 32 is enhanced.

  Each of the gaskets 53 and 54 is formed of a fixed seal and is formed of a resin material having elasticity such as EPDM. Among the gaskets 53 and 54, the gasket 53 is disposed between the adjacent outer wall surfaces 41, and the gasket 54 is disposed between the adjacent base frames 42 (specifically, the vertical frame members 42b). That is, of the gaskets 53 and 54, the gasket 53 is disposed on the outdoor side, and the gasket 54 is disposed on the indoor side. From this point, the gasket 53 can also be referred to as a primary gasket (primary waterproof seal), and the gasket 54 can be referred to as a secondary gasket (secondary waterproof seal). The gasket 53 has a lower end set at the same height as the lower end of the joint 32, whereas the gasket 54 has a lower end set higher than the lower end of the joint 32. As the primary water seal, an irregular seal made of silicon resin or the like may be used instead of the gasket 53 (standard seal).

  As described above, by adopting the double seal structure as the water stop treatment of the joint 32, even if water such as rain water passes through the outdoor (primary) gasket 53, the indoor (secondary) gasket 54 makes it possible to prevent the water from entering the indoor side. Here, the water that has reached the gasket 54 flows down along the gasket 54. In that case, the water falls from the lower end of the gasket 54 onto the base frame 33 below, and flows into the indoor side from the frame 33. There is concern. Therefore, in this embodiment, as a countermeasure, a discharge structure is provided that guides and discharges the water flowing down from the lower end of the gasket 54 to the balcony space BS side (outdoor side). Hereinafter, such a discharge structure will be described.

  A water-stop sheet 56 is bridged over the adjacent outer wall panels 31 across the joint 32. The waterproof sheet 56 is a waterproof sheet formed of a water-resistant material such as vinyl chloride. The waterproof sheet 56 is fixed in a state of being sandwiched between the outer wall surface material 41 and the base frame 42 in each outer wall panel 31, and a part of the waterproof sheet 56 hangs downward from the outer wall panel 31 to waterproof the waterproof plate 47. Is superimposed on the outdoor side surface of the rising portion 47a. In this case, the water-stop sheet 56 is in a state of being stretched up and down between the outer wall panel 31 and the rising portion 47a of the waterproof board 47, whereby the water-stop sheet is formed between the members 31 and 47a. 56 is occluded. Further, both end portions of the water stop sheet 56 in the left-right direction (the direction in which the adjacent outer wall panels 31 are arranged) are overlapped on the outdoor side surface of the lower wall sheet 51 of each outer wall panel 31. Thereby, the water stop sheet | seat 56 and the lower wall sheet | seat 51 of each outer wall panel 31 are mutually continuous.

  In the joint 32, the intermediate portion in the left-right direction of the waterproof sheet 56 is in a state of entering between the base frames 42 (specifically, the vertical frame material 42 b) from the outdoor side. This intrusion portion 57 has a U-shaped cross section projecting toward the indoor side, and has an inner space 57a that is open toward the upper side, the lower side, and the outdoor side. The lower end side of the gasket 54 is fitted into the inner space 57a from the outdoor side. The gasket 54 is disposed in such a manner that both side surfaces thereof are in close contact with the waterproof sheet 56 in the inner space 57a. In this case, the lower end side of the gasket 54 is covered from the indoor side by the entering portion 57 of the water stop sheet 56. The entering portion 57 is covered with the gasket 53 from the outdoor side.

  In the entering portion 57 of the water stop sheet 56, a cover portion 58 that covers the gasket 54 from the indoor side is formed by the upper portion thereof. The cover portion 58 is formed in a range overlapping the gasket 54 in the vertical direction at the entering portion 57. In the cover portion 58, the upper portion has a constant penetration dimension into the indoor side with respect to the outer wall surface material 41, while the lower portion gradually becomes smaller as the penetration dimension moves downward.

  Further, the cover portion 58 (specifically, the upper portion) enters between the base frames 42 (specifically, the vertical frame member 42b) to the vicinity of the indoor side end portion. Here, the vertical frame member 42b (opposing plate portion 44) has a relatively small length in the indoor / outdoor direction (in other words, the wall thickness direction of the outer wall panel 31). It is about twice the thickness of the wall surface material 41 or smaller. In this case, a region on the indoor side of the cover frame 58 between the base frames 42 has a length L3 in the indoor / outdoor direction (specifically, from the indoor side end of the cover 58 to the indoor side end of the base frame 42). The length in the indoor / outdoor direction) is extremely small. Specifically, the length L3 is smaller than the width of the joint 32 (joint width). Note that no members are disposed in the indoor area.

  In the entrance portion 57 of the water stop sheet 56, a guide portion 59 that guides the water flowing down from the gasket 54 to the outdoor side is formed by a portion below the cover portion 58 (a lower portion of the gasket 54). In addition to the entering portion 57 of the waterproof sheet 56, the guide portion 59 is formed by a portion of the waterproof sheet 56 that protrudes below the joint 32 (below the outer wall panel 31). In the guide part 59, the entering dimension to the indoor side is gradually reduced as it goes downward.

  The guide part 59 has a guide surface 59a that receives water flowing from the lower end of the gasket 54 and guides it to the outdoor side. The guide surface 59a is an inclined surface that is inclined downward toward the outdoor side. The guide surface 59a extends downward from the lower end of the joint 32 (gasket 53). The lower end of the guide surface 59a is on the outdoor side of the gasket 54, and further from the base frame 33 (and the rising portion 47a of the waterproof plate 47). Has also reached the outdoor side. Thereby, the water flowing along the guide surface 59a is discharged onto the balcony floor 18 on the outdoor side of the base frame 33. As long as the guide surface 59a is an inclined surface inclined downward toward the outdoor side, the inclination may be linear or curved.

  The inclined surface 62 constituting the guide surface 59 a extends from the lower end side of the cover portion 58. That is, the inclined surface 62 is formed across the cover portion 58 and the guide portion 59. The inclined surface 62 is in contact with the lower end of the gasket 54. In this case, the gap 63 between the cover portion 58 and the gasket 54 is closed at the lower end.

  Here, the waterproof sheet 56 is formed by connecting the sheet material 61 provided in each of the outer wall panels 31. As shown in FIG. 4, the sheet material 61 is disposed with respect to the lower corner portion of the outer wall panel 31. The sheet material 61 extends in the left-right direction along the lower end portion of the outer wall panel 31 and extends in the vertical direction along the side end portion of the outer wall panel 31. In this case, the sheet material 61 protrudes downward from the outer wall panel 31 and also protrudes in the width direction (the joint 32 side).

  In adjacent outer wall panels 31, the protruding dimensions of the sheet material 61 protruding from the outer wall panel 31 in the width direction are different from each other. Of the adjacent outer wall panels 31, the protruding dimension of the sheet material 61 for one outer wall panel 31 (hereinafter referred to as “a”) is L1, and the sheet material 61 for the other outer wall panel 31 (hereinafter referred to as this symbol). L2 is larger than L1, where L2 is the protruding dimension of (b). L1 and L2 are both larger than the thickness of the outer wall surface material 41.

  Each of the sheet materials 61a and 61b of the outer wall panel 31 is provided with an adhesive surface 61c on the leading end side of the protruding portion. The bonding surfaces 61c are bonded to each other using an adhesive or the like, and the sheet materials 61a and 61b are connected to each other by the bonding to form a water stop sheet 56.

  A water stop member 65 is disposed between the gasket 54 and the cover portion 58 of the water stop sheet 56 at the joint 32. In the present embodiment, the water stop member 65 blocks the gap 63 between the gasket 54 and the cover portion 58, thereby preventing rainwater from being blown into the building through the gap 63. Hereinafter, the structure regarding this water stop member 65 is demonstrated.

  A gap 63 between the gasket 54 and the cover 58 extends in the vertical direction, and a water stop member 65 is disposed at the upper end of the gap 63. The water stop member 65 is made of an elastic material having a predetermined thickness, and is made of, for example, a rubber material (sponge material) such as EPDM. The water stop member 65 is disposed between the gasket 54 and the cover 58 in a state compressed in the indoor / outdoor direction. As a result, the gap 63 between the both 54 and 58 is closed by the water stop member 65 at the upper end portion.

  The water-stop member 65 is fixed to the sheet material 61b on the side of the sheet material 61a, 61b constituting the water-stop sheet 56, which has a larger protruding dimension L2 from the outer wall panel 31 to the joint 32 side. The water stop member 65 is fixed to the distal end portion of the protruding portion of the sheet material 61b using an adhesive, and more specifically, is fixed to a predetermined range from the distal end of the protruding portion toward the proximal end side.

  Next, an operation procedure when performing the above-described water stop treatment on the joint 32 will be described. FIG. 9 is a diagram for explaining the work procedure.

  At the construction site, first, each building unit 20 conveyed from the manufacturing factory is installed at a predetermined position. Thereby, joints 32 are formed between the outer wall panels 31 of the adjacent building units 20. The sheet material 61 and the lower wall sheet 51 are attached to the outer wall panel 31 in advance at the manufacturing factory.

  In the water stop process, first, as shown in FIG. 9A, the sheet members 61a and 61b of the adjacent outer wall panels 31 are pulled out from the joint 32 to the outdoor side.

  Next, as shown in FIG. 9 (b), the sheet material 61b on the side with the larger protruding dimension is folded back to the indoor side so that the adhesive surfaces 61c of the sheet materials 61a and 61b are bonded with an adhesive or the like. Use together. Thereby, each sheet material 61a, 61b is mutually connected, and the water stop sheet | seat 56 is formed.

  Next, as shown in FIG. 9 (c), the portion of the waterproof sheet 56 that is pulled out from the joint 32 to the outdoor side is pushed into the joint 32. At this time, the shape of the water stop sheet 56 is adjusted so that the size of the water stop sheet 56 entering the joints 32 gradually decreases from the upper end side to the lower end of the water stop sheet 56, thereby entering the water stop sheet 56. The cover portion 58 and the guide portion 59 are formed by the portion 57. In order to push the waterproof sheet 56 into the joint 32, for example, a dedicated pushing jig is inserted into the joint 32 from the outdoor side, and is pushed in using the inserted jig.

  Next, as shown in FIG. 9D, the gasket 54 is fitted between the base frames 42 in the joint 32. At this time, the lower end side of the gasket 54 is allowed to enter the inner space 57 a of the entering portion 57 in the water stop sheet 56. Then, the gasket 54 is pushed toward the water stop member 65 in the entering state, and thereby the water stop member 65 is compressed between the gasket 54 and the water stop sheet 56 (cover portion 58). As a result, the gap 63 between the gasket 54 and the cover 58 is closed by the water stop member 65. In order to push the gasket 54 toward the water stop member 65, for example, a dedicated pushing jig is inserted into the joint 32 from the outdoor side, and is pushed in using the inserted jig.

  Thereafter, the gasket 53 is fitted between the outer wall surfaces 41 in the joint 32. Thereby, the water stop process with respect to the joint 32 is completed.

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

  Since the gap 63 between the gasket 54 and the cover portion 58 of the water-stop sheet 56 is closed by the water-stop member 65, rainwater is prevented from being blown into the building through the gap 63 when there is rainfall with strong wind. be able to.

  Since the water stop member 65 is disposed only in a part in the vertical direction in the gap 63 between the gasket 54 and the cover portion 58, the water stop member 65 can be formed with a relatively small vertical width. Thereby, the operation | work which pushes and arrange | positions the water stop member 65 in the joint 32 can be made easy.

  Specifically, the water stop member 65 is disposed at the upper end portion in the gap 63. In this case, when rainwater blows into the gap 63 from below, the water flows upward through the gap 63 and then stops at the water stop member 65. In this case, since the water flow is stopped by the water stop member 65 after the momentum of the upward water flow is reduced by the gap 63, it is possible to suitably prevent water from entering the building. .

  The guide portion 59 is provided with a guide surface 59a that receives the water flowing down from the gasket 54 and guides it to the outdoor side, and the guide surface 59a is constituted by an inclined surface 62 that is inclined downward toward the outdoor side. The inclined surface 62 was formed so as to straddle the cover portion 58 and the guide portion 59, and was brought into contact with the lower end of the gasket 54 in the middle thereof. In this case, since the gap 63 between the gasket 54 and the cover portion 68 is closed (or almost closed) at the lower end of the gasket 54, the entry of water from below into the gap 63 is suppressed. Can do. Thereby, it is possible to more reliably prevent water from being blown into the building through the gap 63.

  In the above-described configuration in which the waterstop sheet 56 is sandwiched and fixed between the outer wall surface material 41 and the base frame 42, it is assumed that the size of the sandwiching margin varies. In that case, it is assumed that the penetration size of the cover portion 58 into the joint 32 (the back side of the joint) is varied, and consequently, the gap 63 between the cover portion 58 and the gasket 54 is varied. In that respect, in the above-described embodiment, the water stop member 65 is disposed in a state in which it is compressed indoors and outdoors in the gap 63 between the gasket 54 and the cover portion 58, so that variations occurring in the gap 63 are not affected. Can be absorbed by compression. Thereby, the water stop function by the water stop member 65 can be exhibited reliably regardless of the variation of the gap 63.

  In the above-described configuration in which the sheet materials 61a and 61b of the adjacent outer wall panels 31 are bonded to each other and connected to thereby form the waterproof sheet 56, when the sheet materials 61a and 61b are bonded to each other, the size of the bonding margin is large. It is assumed that variations occur in the length. In that case, it is assumed that the penetration dimension of the cover portion 58 into the joint 32 is varied, and consequently, the gap 63 between the cover portion 58 and the gasket 54 is varied. In that respect, in the above embodiment, since the variation generated in the gap 63 can be absorbed by the compression of the water stop member 65, the water stop function by the water stop member 65 can be surely exhibited regardless of the variation of the gap 63. it can.

  Since the projecting dimensions L1 and L2 of the sheet materials 61a and 61b are different from each other, when the sheet materials 61a and 61b are bonded to each other while being pulled out from the joint 32 to the outdoor side, the sheet material 61b on the side with the larger projecting dimensions is used. The two sheet materials 61a and 61b can be bonded together by bending them into a U shape. For example, when the protruding dimensions of both sheet materials 61a and 61b are the same, it is necessary to bond both sheet materials 61a and 61b by bending them inward, but the protruding dimensions of both sheet materials 61a and 61b are the same. In the different configurations described above, it is only necessary to bend only the sheet material 61b on the side having a large protruding dimension at the time of bonding. Therefore, it becomes possible to perform the bonding operation relatively easily.

  By the way, a sandwiching member that sandwiches the cover portion 58 between the base frame 42 and the gasket 54 is provided in a region on the indoor side of the cover portion 58, thereby providing a gap between the gasket 54 and the cover portion 58. It is conceivable to prevent it from occurring. Also in this case, it is possible to prevent water from being blown into the building through between the gasket 54 and the cover 58. However, in the above-described embodiment, the base frame 42 (specifically, the vertical frame member 42b) has a small thickness (indoor / outdoor length), thereby reducing the indoor / outdoor length in the indoor region. The width of the joint 32 is smaller. For this reason, it is difficult to provide a sandwiching member in the indoor area. Therefore, in the above embodiment, in view of this point, the above-described water stop structure using the water stop member 65 is applied to such a configuration. In this case, even when it is difficult to provide a sandwiching member in the indoor area, it is possible to prevent water from being blown into the building.

  In the joint 32 between the outer wall panels 31 of the adjacent building units 20, it is considered difficult to arrange the above-described sandwiching member across the base frames 42. In that respect, in the above-described embodiment, since the above-described water-stopping structure using the water-stopping member 65 is applied to the joint 32 between the building units 20, water is blown into the building at the joint 32. It becomes possible to prevent suitably.

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

  (1) In the above embodiment, the water stop member 65 is disposed at the upper end portion in the gap 63 between the gasket 54 and the cover portion 58, but this is changed to place the water stop member 65 in the middle portion of the gap 63. Or it may be arranged at the lower end. Further, the water stop member 65 may be disposed over the entire vertical direction of the gap 63.

  (2) In the above embodiment, the water stop member 65 is fixed to the water stop sheet 56 (sheet material 61 b), but this may be changed to fix the water stop member 65 to the gasket 54. Further, the water stop member 65 may not be fixed to the water stop sheet 56 or the gasket 54. In that case, after the water stop sheet 56 is inserted into the joint 32 to form the cover portion 58 and the guide portion 59, the water stop member 65 is inserted into the joint 32, and then the gasket 54 is inserted into the joint 32. .

  (3) In the above embodiment, the lower end side of the gasket 54 is covered from the indoor side by the cover portion 58. However, for example, the cover portion 58 (water blocking sheet 56) is formed to extend to the upper end of the gasket 54, and the cover The entire vertical direction of the gasket 54 may be covered by the portion 58.

  (4) In the above embodiment, the inclined surface 62 constituting the guide surface 59 a is formed across the cover portion 58 and the guide portion 59, but the inclined surface 62 may be formed only on the guide portion 59.

  (5) In the above-described embodiment, the protruding dimensions L1 and L2 of the sheet members 61a and 61b in the adjacent outer wall panels 31 are different from each other. However, the protruding dimensions L1 and L2 may be the same. Further, the water-stop sheet 56 is not necessarily configured by connecting the two sheet members 61a and 61b, and may be formed by, for example, one sheet member spanned between the adjacent outer wall panels 31.

  (6) By the way, when the length of the vertical frame member 42b (base frame 42) in the indoor / outdoor direction is relatively large, the region on the indoor side of the cover 58 between the vertical frame members 42b. Can be a relatively large area. For example, the indoor-outside length L3 of the indoor area can be made sufficiently larger than the joint width. Therefore, in such a case, the spacer member may be disposed in a state where the cover portion 58 is in contact with the cover portion 58 from the indoor side in the region on the indoor side. In this case, since the water stop member 65 can be compressed between the gasket 54 and the spacer member, the water stop member 65 can be more suitably compressed.

  (7) In the above embodiment, the water stop structure of the present invention is applied to the joint 32 between the outer wall panels 31 of the adjacent building units 20, but the present invention is applied to the joint between the adjacent outer wall panels 31 in one building unit 20. The water stop structure may be applied.

  (8) In the above embodiment, the joint water-stopping structure of the present invention is applied to the outer wall portion 17 of the second floor portion 15 facing the balcony 16 (balcony space BS), but other outer wall portions in the second floor portion 15 and the first floor The present invention may be applied to the outer wall portion of the portion 14.

  (9) Although the application example to the unit type building has been described in the above embodiment, the present invention can be applied to a building having another structure such as a building constructed by a steel frame assembling method. In short, if the outer wall panel is a building provided side by side, the water stop structure of the present invention can be applied to a joint between adjacent outer wall panels.

  DESCRIPTION OF SYMBOLS 10 ... Building, 20 ... Building unit, 31 ... Outer wall panel, 32 ... Joint, 41 ... Outer wall surface material, 42 ... Base frame, 54 ... Gasket, 56 ... Water stop sheet, 58 ... Cover part, 59 ... Guide part, 59a ... guide surface, 61 ... sheet material, 62 ... inclined surface, 63 ... gap, 65 ... waterstop member.

Claims (9)

A plurality of outer wall panels having an outer wall surface material and a base frame provided on the indoor side of the outer wall surface material are provided side by side, and a joint between adjacent outer wall panels extends vertically along the joint. A gasket is a water stop structure of the outer wall joint disposed between the base frames,
A water stop sheet spanned between the adjacent outer wall panels in a state of straddling the joint,
The waterproof sheet is fixed in a state of being sandwiched between the outer wall surface material and the base frame in each of the outer wall panels,
By the water stop sheet,
In a state of entering between the base frames from the outdoor side in the joint, a cover portion covering at least the lower end portion of the gasket from the indoor side,
A guide portion is provided below the gasket, and guides the water that has flowed down from the lower end of the gasket to the outdoor side of the gasket.
A water-stopping structure for an outer wall joint, characterized in that a water-stopping member is provided between the gasket and the covering portion to close a gap between them. The gap between the gasket and the cover portion extends in the vertical direction,
The water stop structure for an outer wall joint according to claim 1, wherein the water stop member is disposed only in a part of the gap in the vertical direction.   The said water stop member is arrange | positioned at the upper end part of the said clearance gap, The water stop structure of the outer wall joint of Claim 2 characterized by the above-mentioned. The guide portion has a guide surface that receives and guides water that has flowed down from the gasket,
The guide surface is an inclined surface that is inclined downward toward the outdoor side,
The said inclined surface is formed ranging over the said cover part and the said guide part, and is contacting the lower end of the said gasket in the middle, The Claim 1 thru | or 3 characterized by the above-mentioned. Water stop structure of the outer wall joint.   The said water stop member is formed with the material which has elasticity, and is arrange | positioned in the state compressed in the indoor / outdoor direction in the said clearance gap between the said gasket and the said cover part. The water stop structure of the outer wall joint according to any one of 4. Sheet materials are fixed to the adjacent outer wall panels in a state of being sandwiched between the outer wall surface material and the base frame,
In each sheet material of the said adjacent outer wall panel, the said water stop sheet | seat is comprised by the parts which protruded in the said joint side being mutually bonded and connected in the said joint. The waterproof structure of the outer wall joint described. Each of the sheet materials has different protruding dimensions from the outer wall panel to the joint side,
7. The water stop structure for an outer wall joint according to claim 6, wherein the water stop member is fixed to a sheet material on the side of the projecting dimension that is larger than the sheet material.   The region on the indoor side with respect to the cover portion between the base frames of the adjacent outer wall panels has a length in the indoor / outdoor direction smaller than the joint width of the joint. The water stop structure of the outer wall joint according to any one of 7. Applied to a unit-type building in which a plurality of building units including a rectangular parallelepiped frame having beams and columns and the outer wall panel provided on a side surface of the frame are connected to each other,
The gap between the said gasket and the said cover part in the joint between the said outer wall panels of an adjacent building unit is obstruct | occluded by the said water stop member, It is any one of Claim 1 thru | or 8 characterized by the above-mentioned. The waterproof structure of the outer wall joint described.

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