Water-stopping structures and devices for buildings

Abstract

To provide a water cut-off structure for a building, and a water cut-off device.SOLUTION: A water cut-off structure includes: a frame body 20 including a pair of vertical frames 21 and a lower frame 22 and attached to an outer wall 10 so as to surround an opening part H; a water cut-off plate 30 capable of being mounted on the lower frame 22; a seal part 40 including a pair of vertical seal parts 42 arranged between the pair of vertical frames 21 and the water cut-off plate 30 and a lower seal part 41 arranged between the lower frame 22 and the water cut-off plate 30; and an attachment mechanism 50 having a driving input gear 51 provided on the water cut-off plate 30 and an energizing mechanism compressing the pair of vertical seal parts 42 between the water cut-off plate 30 and the pair of vertical frames 21 by receiving driving force inputted to the driving input gear 51 as well as energizing the water cut-off plate 30 in an indoor direction and a lower direction so as to compress the lower seal part 41 between the water cut-off plate 30 and the lower frame 22.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a water stop structure and a water stop device for a building. [Background technology]

[0002] Conventionally, water-stopping structures that block openings in buildings to prevent water from seeping in have been known. Patent Document 1 discloses a water-intrusion prevention device that can be assembled in the passageway of a building's entrance in the event of an emergency such as heavy rain or flooding, and that functions to prevent water from seeping into the building.

[0003] In this technology, the water intrusion prevention device comprises a support material having a vertical groove with a U-shaped cross section provided on both side wall surfaces of a building's passageway, a waterstop panel whose both side ends are pressed against the inner surface of the vertical groove of the support material to close the building's passageway, a panel support beam member installed on the floor surface of the passageway to receive the lower end surface of the waterstop panel, a first crimping means for crimping the lower end surface of the waterstop panel onto the panel support beam member, a second crimping means for crimping and fixing the panel support beam member onto the floor surface, and a panel fixing means for crimping and fixing both side ends of the waterstop panel to the inner surface of the vertical groove of the support material. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-096114 Summary of the Invention [Problem to be solved by the invention]

[0005] In the technology described in Patent Document 1, workers must sequentially operate the first crimping means, the second crimping means, and the panel fixing means, which are located in different positions, to fix the waterstop panel and enable its waterstop function to be realized. In this case, the waterstop structure cannot be installed easily and quickly in emergencies such as heavy rain or flooding, and installation workability is poor.

[0006] An object of the present invention is to provide a water stop structure and a water stop device for a building that can be easily and quickly installed in emergencies such as heavy rain or flooding. [Means for solving the problem]

[0007] The first invention provides a water stop structure for a building that prevents water from entering the room through an opening in a wall of the building, the water stop structure including a pair of vertical frames extending in the up-down direction and a lower frame extending in the left-right direction and connecting the pair of vertical frames, and a frame body attached to the wall so as to surround the opening, a water stop plate that has a shape that can cover at least a lower portion of the opening and a left-right dimension that overlaps the pair of vertical frames in the inside-outside direction of the building and can be placed on the lower frame, and a water stop plate that can be placed on the pair of vertical frames on the inside of the room between the pair of vertical frames. The waterstop mounting mechanism comprises a sealing portion including a pair of vertical sealing portions arranged in the up-down direction between the vertical frame and the waterstop, and a lower sealing portion arranged in the left-right direction between the lower frame and the waterstop; and a waterstop mounting mechanism that is arranged on the waterstop and has a drive input portion and a biasing mechanism that receives a drive force input to the drive input portion to compress the pair of vertical sealing portions between the waterstop and the pair of vertical frames, while biasing the waterstop toward the room and downward, respectively, so as to compress the lower sealing portions between the waterstop and the lower frame.

[0008] With this configuration, after placing the waterstop on the lower frame of the frame body attached to the wall so as to surround the opening, applying a driving force to the drive input unit causes the biasing mechanism to compress the pair of vertical seals between the waterstop and the pair of vertical frames, while biasing the waterstop toward the room and downward so as to compress the lower seal between the waterstop and the lower frame. This allows for easy and quick installation of a waterstop structure in emergencies such as heavy rain or flooding.

[0009] In a second invention, in the first invention, the drive input portion of the waterstop mounting mechanism is arranged on a surface of the waterstop that faces the interior of the building.

[0010] According to this configuration, since the drive input part is positioned on the inner surface of the water stop, the worker can input a drive force to the drive input part from inside the room, which prevents the worker from getting wet with rainwater or the like when installing the water stop.

[0011] The third invention is the first or second invention, wherein the biasing mechanism of the waterstop mounting mechanism has an engaging portion and a moving portion that is capable of receiving the driving force to move the engaging portion between an engaged position and a disengaged position, wherein the engaging position is a position where the engaging portion sandwiches the vertical frame and the vertical seal portion from both sides between the engaging portion and the waterstop in the inward / outward direction, and the disengaged position is a position where the engaging portion is separated from the vertical frame.

[0012] According to this configuration, the driving force input to the drive input portion causes the moving portion to move the engaging portion between the engaged position and the disengaged position. In particular, in the engaged position, the engaging portion sandwiches the vertical frame and the vertical seal portion from both sides between the engaging portion and the waterstop in the inward and outward directions, stably compressing the vertical seal portion and achieving watertight performance. In addition, in the disengaged position, the engaging portion moves away from the vertical frame, preventing the engaging portion from interfering with the removal of the waterstop.

[0013] The fourth invention is the third invention, wherein the engaging portion is supported on the water stop plate so as to be rotatable around a central axis, and the moving portion receives the driving force to rotate the engaging portion between the engaging position and the disengaging position, and the surface of the engaging portion facing the vertical frame is tapered from the disengaging position toward the engaging position.

[0014] According to this configuration, the movable portion rotates the engaging portion, which allows the engaging portion to be easily moved between the engaged position and the disengaged position. In particular, since one surface of the engaging portion is tapered toward the engaged position, the biasing force of the engaging portion toward the indoor side of the water stop by the engaging portion gradually increases, thereby enabling the sealing performance of the vertical seal portion to be exhibited.

[0015] The fifth invention is the third invention, wherein the vertical frame has an abutment portion that abuts against the engagement portion at the engagement position, and is capable of moving the water stop downward by the driving force while preventing the engagement portion from moving upward.

[0016] According to this configuration, when the engaging portion abuts the abutting portion, the driving force input to the drive input portion can be converted into a downward moving force for the waterstop, in other words, a compressive action on the lower seal portion.

[0017] The sixth invention is, in the first to fifth inventions, wherein the waterstop mounting mechanism further has an operating handle that is rotatably supported on the waterstop and receives operation to input a rotational driving force to the drive input portion.

[0018] According to this configuration, by operating the operating handle, the worker can easily input a driving force to the drive input portion and perform the work of attaching the waterstop.

[0019] The seventh invention is a device according to any one of the first to sixth inventions, wherein the frame body further comprises a lid portion supported on the vertical frame so as to be switchable between an open state and a closed state relative to the vertical frame, the open state being a state that allows the water stop to be placed on the lower frame, and the closed state being a state that prevents the water stop from being placed on the lower frame, and a locking mechanism that can lock the water stop so as to compress the lower seal portion when the lid portion is in the closed state.

[0020] With this configuration, the water stop can be easily attached to the frame by opening and closing the lid, and after the lid is closed, the water stop is locked into the engagement position of the engagement part using the locking mechanism, thereby maintaining the downward displacement of the water stop and stably maintaining the sealing properties of the lower seal part.

[0021] The eighth invention provides a water stop device comprising: a frame body including a pair of vertical frames extending in the up-down direction and a lower frame extending in the left-right direction connecting the pair of vertical frames; a water stop plate having left-right dimensions such that it overlaps at least the pair of vertical frames and capable of being placed on the lower frame; a sealing portion including a pair of vertical sealing portions arranged in the up-down direction between the pair of vertical frames and the water stop plate, and a lower sealing portion arranged in the left-right direction between the lower frame and the water stop plate; and a water stop plate mounting mechanism arranged on the water stop plate and having a drive input portion and a biasing mechanism that receives a drive force input to the drive input portion to compress the pair of vertical sealing portions between the water stop plate and the pair of vertical frames, while biasing the water stop plate so as to compress the lower sealing portions between the water stop plate and the lower frame.

[0022] With this configuration, when the frame is attached to the wall surrounding the opening of a building and the waterstop is placed on the lower frame, and a driving force is applied to the drive input unit, the biasing mechanism compresses the pair of vertical seals between the waterstop and the pair of vertical frames, while biasing the waterstop so that the lower seal is compressed between the waterstop and the lower frame. This allows the waterstop device to be installed easily and quickly in emergencies such as heavy rain or flooding. [Effects of the Invention]

[0023] According to the present invention, it is possible to provide a water stop structure and a water stop device for a building that can be easily and quickly installed in emergencies such as heavy rain or flooding. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a vertical cross-sectional view of an opening in a building and a water-stopping structure according to one embodiment of the present invention. [Figure 2] 1 is a horizontal cross-sectional view of an opening in a building and a water-stopping structure according to one embodiment of the present invention. [Figure 3] 1 is a front view of a waterproof structure for a building according to an embodiment of the present invention, as viewed from the indoor side. [Figure 4]1 is an enlarged horizontal cross-sectional view of a waterproofing structure for a building according to one embodiment of the present invention, showing an engaging portion disposed in a disengaged position. FIG. [Figure 5] 1 is an enlarged front view of a waterproof structure for a building according to one embodiment of the present invention, seen from the indoor side, showing an engaging portion disposed in a disengaged position. FIG. [Figure 6] FIG. 2 is an enlarged horizontal cross-sectional view of a waterproofing structure for a building according to one embodiment of the present invention, showing an engaging portion disposed in an engaging position. [Figure 7] 1 is an enlarged front view of a waterproof structure for a building according to one embodiment of the present invention, seen from the indoor side, showing an engaging portion disposed in an engaging position. FIG. [Figure 8] 1 is a front view of a water stopping structure for a building according to one embodiment of the present invention, with the water stop plate removed and the vertical frame cover closed. FIG. [Figure 9] 9 is a front view showing how the waterstop is inserted into the frame body from the state shown in FIG. 8. FIG. [Figure 10] 10 is a front view showing the state after the waterstop has been inserted and the lid is closed, following the state shown in FIG. 9. FIG. [Figure 11] 11 is a front view of the state in which the waterstop is biased downward from the state in FIG. 10. FIG. [Figure 12] FIG. 2 is an enlarged front view of the waterproof structure for a building according to the first modified embodiment of the present invention, as seen from the indoor side, showing an engaging portion disposed in an engaging position. [Figure 13] 10 is a plan view of the periphery of the restricting portion in the waterproof structure for a building according to the first modified embodiment of the present invention, showing a state in which the slider is separated from the first gear. FIG. [Figure 14] 10 is a front view of the periphery of the restricting portion in the waterproof structure for a building according to the first modified embodiment of the present invention, showing a state in which the slider is separated from the first gear. FIG. [Figure 15] 10 is a plan view of the periphery of a restricting portion in the waterproof structure for a building according to a first modified embodiment of the present invention, showing a state in which the slider is engaged with the first gear. FIG. [Figure 16] FIG. 10 is a front view of the periphery of the restricting portion in the waterproof structure for a building according to the first modified embodiment of the present invention, showing a state in which the slider is engaged with the first gear. [Figure 17] FIG. 10 is an enlarged front view of the waterproof structure for a building according to a second modified embodiment of the present invention, as seen from the indoor side, showing an engaging portion disposed in an engaging position. [Figure 18] FIG. 10 is a perspective view of an operating handle of a waterproof structure for a building according to a second modified embodiment of the present invention. [Figure 19] 19A and 19B are enlarged views of the periphery of the engaging protrusion of the operating handle of FIG. 18. DETAILED DESCRIPTION OF THE INVENTION

[0025] A water stopping structure (water stopping device) for a building according to one embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of an opening H of a building and the water stopping structure according to this embodiment. FIG. 2 is a horizontal cross-sectional view of an opening H of a building and the water stopping structure according to this embodiment. FIG. 3 is a front view of the water stopping structure for a building according to this embodiment, as seen from inside the building. Note that in these and subsequent figures, the inside / outside directions, left / right directions, and up / down directions of the building are shown as necessary for ease of explanation, but these directions do not limit the present invention. Of the inside / outside directions, the inside direction is the direction facing the interior of the building, and the outside direction is the direction facing the exterior of the building.

[0026] The building may be, for example, a wooden house or a steel-framed house. The building may also be a building. In this embodiment, the building will be described as a house. The building includes an exterior wall 10, an interior wall 11, a plurality of sashes 12, a floor material 14, and a shutter rail 16.

[0027] The exterior wall 10 constitutes the exterior of the building, and extends in the left-right and up-down directions in each drawing. The exterior wall 10 constitutes a wall portion in this embodiment.

[0028] The interior wall 11 is disposed at a distance inside the exterior wall 10. The interior wall 11, together with the exterior wall 10, constitutes the wall portion of this embodiment. An opening H is formed in the interior wall 11. The opening H connects the outside of the building with the interior of the building. In this embodiment, the opening H has a rectangular shape extending in the vertical and horizontal directions.

[0029] The interior wall 11 defines the interior space. The interior wall 11 has a wall main body 11A and a window frame 11B. The wall main body 11A is a wall arranged parallel to the exterior wall 10. The window frame 11B extends from the wall main body 11A toward the outside of the room so as to surround the opening H. Note that while only a portion of the window frame 11B is shown in Figure 2, the window frame 11B is arranged so as to surround the opening H from above, below, left, and right.

[0030] The plurality of sashes 12 are slidable in the left-right direction so as to open and close the opening H. In this embodiment, two sashes 12 are arranged for the opening H.

[0031] The floor material 14 is a board material arranged to extend horizontally inside the building. The floor material 14 is arranged in a position corresponding to the lower ends of the multiple sashes 12. In other words, in this embodiment, the opening H and the window portion formed by the multiple sashes 12 are comprised of a French window that continues into the floor material 14. Although not shown in FIG. 1, the lower end of the exterior wall 10 is connected to the ground, and as an example, the height of the floor material 14 from the ground is set to be 400 to 600 mm.

[0032] As shown in Figure 2, the shutter rails 16 are arranged to protrude from the exterior wall 10 on the left and right outer sides of the sash 12, and extend in the vertical direction. Note that a similar shutter rail 16 is also arranged on the opposite side (right side) of the sash 12 in Figure 2. This pair of shutter rails 16 has the function of vertically guiding a shutter (not shown) that covers the window portion from the outside of the room.

[0033] The waterproof structure for a building according to this embodiment has the function of preventing water from seeping into the interior of a room through opening H in the wall of the building as described above. The following describes an example of preventing water from seeping in at a water level above the floor level in a typical house. The waterproof structure has a frame 20, a waterstop 30, a seal 40, and an attachment mechanism 50 (waterstop attachment mechanism).

[0034] When viewed from the outside of the building, the frame body 20 is arranged in a U-shape surrounding the periphery of the opening H and is attached to the exterior wall 10. The frame body 20 has a pair of left and right vertical frames 21 and a lower frame 22. The pair of vertical frames 21 are fixed to the exterior wall 10 at positions spaced apart on the left and right outside of the opening H so as to extend in the up-down direction. Note that only the left vertical frame 21 is visible in FIG. 2. The lower frame 22 is arranged at a distance below the opening H and is fixed to the exterior wall 10 so as to connect the lower ends of the pair of vertical frames 21 in the left-right direction. The frame body 20 is made of metal or resin and can be fixed to the exterior wall 10 with fasteners such as bolts and screws. Note that the frame body 20 may be a frame member having another function that is already installed in the building, or may be a member dedicated to a water-stopping structure (water-stopping device).

[0035] As shown in FIG. 2, the vertical frame 21 has a vertical frame main body 21A, an outer extension 21B, and a waterstop facing portion 21C. The vertical frame main body 21A is fixed to the outer surface of the exterior wall 10 with screws or the like, and as shown in FIG. 2, has a rectangular cross section. The outer extension 21B extends outward in the inward-outward direction from the tip of the vertical frame main body 21A. The waterstop facing portion 21C protrudes from the center of the outer extension 21B in the inward-outward direction toward the opening H side (the right side in FIG. 2). As a result, the outer extension 21B and the waterstop facing portion 21C form an L-shaped space that receives the waterstop 30.

[0036] The waterstop 30 is a plate material having a rectangular shape when viewed from the inside to the outside. For example, the waterstop 30 is made of an aluminum honeycomb panel or a metal-resin sandwich panel. As shown in FIG. 1, the waterstop 30 can be placed on the lower frame 22. The waterstop 30 has a shape that can cover at least the lower portion of the opening H and a left-right dimension that allows it to overlap a pair of vertical frames 21 in the inside-outside direction. When the waterstop 30 is in close contact with the frame 20, it prevents water from entering the building from the outside through the opening H. It is desirable to store the waterstop 30 inside the building except in emergencies such as heavy rain or flooding. Furthermore, in FIG. 1, a predetermined water-proofing treatment is applied between the lower frame 22 of the frame 20 and the exterior wall 10.

[0037] The seal portion 40 is interposed between the frame body 20 and the waterstop 30 and functions to prevent the intrusion of water. The seal portion 40 includes a lower seal portion 41 and a pair of vertical seal portions 42. The lower seal portion 41 is disposed between the lower frame 22 and the waterstop 30 in the left-right direction. Each of the pair of vertical seal portions 42 is disposed between the pair of vertical frames 21 and the waterstop 30 in the up-down direction. In this embodiment, the seal portion 40 is integral with the waterstop 30. In other embodiments, the seal portion 40 may be pre-installed on the frame body 20. However, to prevent deterioration of the seal portion 40 due to long-term storage, it is desirable that the seal portion 40 be integral with the waterstop 30, as described above. Furthermore, using EPDM rubber or hollow resin rubber for the seal portion 40 allows it to exhibit water-stopping properties even at low compression.

[0038] As shown in Fig. 1, the attachment mechanisms 50 have the function of tightly adhering the waterstop 30 placed on the lower frame 22 to the frame body 20. In this embodiment, four attachment mechanisms 50 are arranged on the inner surface (the surface facing the interior of the building) of the waterstop 30. Specifically, two attachment mechanisms 50 (Fig. 3) are arranged vertically side by side on the left side of the waterstop 30, and two more attachment mechanisms 50 (not shown) are arranged vertically side by side on the right side of the waterstop 30.

[0039] The attachment mechanism 50 has a drive input gear 51 (drive input portion), an operating handle 52, a moving portion 53 (part of the biasing mechanism), and an engaging portion 55 (part of the biasing mechanism, also called a crimping portion).

[0040] The drive input gear 51 receives a drive force as the operator operates the operating handle 52. In this embodiment, this drive force is a rotational force. The operating handle 52 has a so-called ratchet mechanism and can be rotated upward or downward by the operator. In other words, the operating handle 52 is operated to input a rotational drive force to the drive input gear 51.

[0041] The moving portion 53 and the engaging portion 55 function as a biasing mechanism. The biasing mechanism receives a driving force input to the drive input gear 51 and has the function of biasing the waterstop 30 toward the room and downward so as to compress the pair of vertical seal portions 42 between the waterstop 30 and the pair of vertical frames 21, and compress the lower seal portion 41 between the waterstop 30 and the lower frame 22.

[0042] Fig. 4 is an enlarged horizontal cross-sectional view of the water stopping structure for a building according to this embodiment, showing the engagement portion 55 in the disengaged position. Fig. 5 is an enlarged front view of the water stopping structure for a building according to this embodiment, seen from the indoor side, showing the engagement portion 55 in the disengaged position. Fig. 6 is an enlarged horizontal cross-sectional view of the water stopping structure for a building according to this embodiment, showing the engagement portion 55 in the engaged position. Fig. 7 is an enlarged front view of the water stopping structure for a building according to this embodiment, seen from the indoor side, showing the engagement portion 55 in the engaged position.

[0043] Referring to FIG. 5 , the operating handle 52 is rotatable up and down around the central axis of rotation of the drive input gear 51. The operating handle 52 includes a handle main body 521 and an engagement gear 522. The handle main body 521 is the main body of the operating handle 52, and a grip portion that can be held by an operator is formed on the longitudinal side of the handle main body 521 opposite to the area that engages with the drive input gear 51. The engagement gear 522 is a fan-shaped gear housed inside the handle main body 521. The engagement gear 522 is engageable with a gear formed on the outer periphery of the drive input gear 51. When the operator moves a switching piece (not shown) provided on the handle main body 521, the attitude and position of the engagement gear 522 within the handle main body 521 are switched. As a result, the rotation direction of the drive input gear 51 is switched according to the rotation direction of the operating handle 52.

[0044] The moving part 53 also has a first gear 53A and a second gear 53B.

[0045] The first gear 53A is a gear rotatably supported on the waterstop 30 to the left of the drive input gear 51 (the side closer to the vertical frame 21 and vertical seal portion 42). The second gear 53B is a gear rotatably supported on the waterstop 30 to the left of the first gear 53A. The first gear 53A is engaged with the drive input gear 51, and the second gear 53B is engaged with the first gear 53A. As a result, when the drive input gear 51 rotates, the rotational drive force is transmitted to the first gear 53A and the second gear 53B, causing the second gear 53B to rotate. In this way, by providing the first gear 53A, the rotation direction when this mechanism operates is determined, and the waterstop 30 can be easily crimped by moving the operating handle 52 downward, which makes it easier for the operator to apply force to it, in other words, by moving it downward, which makes it easier for the operator to apply weight to it.

[0046] In this embodiment, the outer diameter of the first gear 53A is set to be larger than the outer diameter of the drive input gear 51. This outer diameter ratio allows the waterstop 30 to be easily installed with light up and down movements by the worker operating the operating handle 52.

[0047] The engaging portion 55 is a fan-shaped member fixed to a part of the second gear 53B in the circumferential direction (rotational direction). That is, the engaging portion 55 is supported by the waterstop 30 so as to be rotatable about the central axis of rotation of the second gear 53B.

[0048] The engaging portion 55 has a first end 551 and a second end 552. The first end 551 corresponds to one circumferential end of the engaging portion 55. The second end 552 corresponds to the other circumferential end of the engaging portion 55, i.e., the region opposite the first end 551. The plate thickness of the second end 552 is set to be thicker than the plate thickness of the first end 551. In other words, the surface of the engaging portion 55 facing the outer extending portion 21B of the vertical frame 21 is inclined in a tapered manner from the disengagement position toward the engagement position (FIG. 6).

[0049] The aforementioned moving portion 53 is capable of moving (rotating) the engaging portion 55 between an engaged position and a disengaged position upon receiving a driving force from the operating handle 52. The engaged position is a position where the engaging portion 55 sandwiches the outer extending portion 21B of the vertical frame 21 and the vertical seal portion 42 from both sides in the inner and outer directions between the engaging portion 55 and the waterstop 30, and the disengaged position is a position where the engaging portion 55 is separated to the right from the outer extending portion 21B.

[0050] Furthermore, the waterstop plate 30 has a first pin 61, a second pin 62, and a third pin 63. Furthermore, the vertical frame 21 has a fourth pin 64 (abutment portion). These pins constitute a part of the waterstop structure according to this embodiment.

[0051] The first pin 61 is a pin that protrudes from the inner surface of the water stop 30 toward the inside of the room. The first pin 61 restricts the upper limit position of the rotation range of the operating handle 52. In particular, in this embodiment, the first pin 61 is positioned so as to restrict the movement of the operating handle 52 in an area above the height of the water stop 30.

[0052] Similarly, the second pin 62 is a pin that protrudes from the inner surface of the waterstop 30 toward the inside of the room. The second pin 62 regulates the lower limit position of the rotation range of the operating handle 52. The third pin 63 is a pin that protrudes from the inner surface of the waterstop 30 directly below the first gear 53A. The third pin 63 regulates the right end (disengagement position) of the rotation range of the engagement portion 55. The fourth pin 64 is a pin that protrudes from the inner surface of the waterstop opposing portion 21C toward the inside of the room. The fourth pin 64 regulates the left end (upper end) of the rotation range of the engagement portion 55.

[0053] In the water stop structure for a building according to this embodiment, when heavy rain or flooding occurs near the building, a worker prepares the water stop 30. The worker opens the sash 12 from inside the room to open the opening H, and then holds and places the water stop 30 on the sill 22 (FIG. 1). At this time, the lower seal portion 41 is positioned between the water stop 30 and the sill 22, and the vertical seal portion 42 is positioned between the water stop 30 and the water stop opposing portions 21C of the pair of left and right vertical frames 21. The lower ends of the pair of vertical seal portions 42 are connected to both left and right ends of the lower seal portion 41. At this time, the mounting mechanism 50 is in the state shown in FIGS. 4 and 5.

[0054] Next, the operator rotates the operating handle 52 downward as shown by the arrow in FIG. 7. At this time, the rotational force of the operating handle 52 is transmitted to the drive input gear 51, the first gear 53A, and the second gear 53B, and the engagement portion 55 begins to rotate from the disengaged position toward the engaged position. When the operating handle 52 reaches the lower limit position, the operator rotates the operating handle 52 upward as shown by the arrow in FIG. 5. At this time, the engagement gear 522 of the operating handle 52 does not engage with the drive input gear 51, so the drive input gear 51 does not rotate (idle). Then, when the operating handle 52 reaches the upper limit position, the operating handle 52 is rotated downward again, and similarly, the engagement portion 55 rotates toward the engaged position.

[0055] Eventually, the inclined surface formed on the engaging portion 55 slides against the waterstop opposing portion 21C of the vertical frame 21, and the engaging portion 55 rotates upward. As a result, the vertical seal portion 42 is gradually compressed between the waterstop 30 and the waterstop opposing portion 21C (arrow D2 in FIG. 2). In other words, the waterstop 30 is pulled toward the room by the engaging portion 55. As a result, the sealing function (water-proof function) of the vertical seal portion 42 is improved.

[0056] Thereafter, when the first end 551 of the engaging portion 55 abuts against the fourth pin 64 as shown in Figure 3, the rotation of the engaging portion 55 is restricted. When the operator further rotates the operating handle 52 downward, the rotation of the engaging portion 55 is restricted, and the waterstop 30 itself moves downward (arrow D3 in Figure 3) due to the driving force input from the operating handle 52. As a result, the lower seal portion 41 is compressed between the waterstop 30 and the lower frame 22 (Figure 1), improving the sealing function of the lower seal portion 41.

[0057] In this way, the fourth pin 64 abuts against the engagement portion 55 at the engagement position, thereby preventing the engagement portion 55 from moving upward while moving the water stop plate 30 downward by the driving force.

[0058] By operating the attachment mechanisms 50 at four locations provided on the waterstop 30, the worker can stably attach and secure the waterstop 30 to the frame body 20. When the inclined surface of the engagement portion 55 is engaged with the waterstop opposing portion 21C, the vertical seal portion 42 exerts a repulsive force in the inward and outward directions, preventing the engagement portion 55 from rotating in the opposite direction and preventing the engagement portion 55 from detaching. Furthermore, the rotation range of the operating handle 52 is limited by the first pin 61 and the second pin 62, so unintentional rotation of the engagement portion 55 after the waterstop 30 has been attached can similarly be prevented (anti-rotation function).

[0059] When the worker removes the waterstop 30, he or she operates a switching piece (not shown) provided on the operating handle 52 in advance to switch the position of the engagement gear 522. Thereafter, when the operating handle 52 is rotated upward as shown by the arrow in Figure 5, the engagement portion 55 moves from the engagement position to the disengagement position in the reverse order to the above. At this time, the downward rotation of the operating handle 52 becomes idling.

[0060] In this embodiment, as described above, downward rotation of the operating handle 52 causes the engaging portion 55 to come into sliding contact with the waterstop opposing portion 21C at the engaged position. Therefore, the worker operating the operating handle 52 can easily apply force downward, allowing the waterstop 30 to be easily installed.

[0061] <Regarding the mechanism for preventing detachment of the engaging portion 55> Next, a description will be given of the mechanism for preventing detachment of the engaging portion 55 engaged with the waterstop opposing portion 21C in this embodiment. Fig. 8 is a front view of the waterstop structure for a building according to this embodiment, with the waterstop 30 removed and the lid 211 of the vertical frame 21 closed. Fig. 9 is a front view showing the waterstop 30 being inserted into the frame body 20 from the state shown in Fig. 8. Fig. 10 is a front view of the waterstop 30 after insertion has been completed and the lid 211 has been closed from the state shown in Fig. 9. Fig. 11 is a front view of the waterstop 30 being biased downward from the state shown in Fig. 10.

[0062] In this embodiment, there is a mechanism for maintaining the attached waterstop 30 in a state where it is biased downward. Specifically, as shown in Fig. 8, the vertical frame 21 further has a lid 211 (lid portion), a latch guide 212, a latch 213, a spring 214, and a wire W. The latch guide 212, the latch 213, the spring 214, and the wire W constitute a locking mechanism in this embodiment.

[0063] When viewed in the left-right direction, lid 211 is disposed so as to be located above waterstop 30. Lid 211 is rotatable up and down around lid fulcrum portion 211S in Fig. 8. By this rotation, lid 211 can be switched between a closed state shown in Fig. 8 and an open state shown in Fig. 9.

[0064] The latch guide 212 is fixed to the vertical frame 21 below the lid 211, and guides the latch 213 so that it can slide left and right. The latch 213 is a member for regulating the position of the waterstop 30, and is housed in the latch guide 212. The spring 214 is a spring that can expand and contract between the latch 213 and the vertical frame 21, and its base end is fixed to the vertical frame 21 and its tip is fixed to the latch 213. The wire W is arranged to connect the center of the lid 211 and the latch 213.

[0065] When the waterstop 30 is not attached to the vertical frame 21, the lid 211 is closed as shown in Figure 8. On the other hand, when the waterstop 30 is attached to the vertical frame 21, the lid 211 is opened relative to the vertical frame 21 as shown in Figure 9. As a result, the waterstop 30 can be attached to the frame body 20 from above, as shown by the arrow in Figure 9. At this time, the wire W connected to the lid 211 pulls the latch 213, causing the latch 213 to retract from the area through which the waterstop 30 passes, and the latch 213 does not interfere with the attachment of the waterstop 30.

[0066] Once the waterstop 30 is placed on the lower frame 22 as shown in Fig. 1, the worker can close the lid 211 as shown in Fig. 10. At this time, the latch 213 is biased toward the side of the waterstop 30 by the spring 214. Furthermore, because the worker has not yet operated the attachment mechanism 50, the waterstop 30 has not yet been actively biased downward.

[0067] Thereafter, as described above, when the worker operates the attachment mechanism 50 and the engaging portion 55 reaches the engaged position, the waterstop 30 is biased downward while compressing the lower seal portion 41. At this time, as shown in FIG. 11 , the position of the waterstop 30 drops, and the latch 213 is pushed out by the spring 214, engaging with the upper surface of the waterstop 30. As a result, the engaging portion 55 does not come off the waterstop opposing portion 21C, and the waterstop 30 does not lift up, preventing a deterioration in the sealing performance of the lower seal portion 41. Note that the position at which the detachment prevention mechanism, exemplified by the latch 213, engages with the waterstop 30 is not limited to the upper surface of the waterstop 30. For example, the latch 213 may engage with a groove (not shown) formed on the side of the waterstop 30.

[0068] As described above, in this embodiment, after the waterstop 30 is placed on the lower frame 22 of the frame body 20 attached to the exterior wall 10 so as to surround the opening H, when a driving force is input to the drive input gear 51, the biasing mechanism compresses the pair of vertical seal portions 42 between the waterstop 30 and the pair of vertical frames 21, while biasing the waterstop 30 toward the interior and downward so as to compress the lower seal portion 41 between the waterstop 30 and the lower frame 22. This allows for easy and rapid installation of a waterstop structure in emergencies such as heavy rain or flooding. Furthermore, because an operator can simply operate the mounting mechanism 50 to position the waterstop 30 in a predetermined position where its water-stopping performance is maximized, installation is easy for not only adult men but also women and the elderly.

[0069] In addition, in this embodiment, the mounting mechanism 50 including the drive input gear 51 is positioned on the inner surface of the water stop 30, so that the worker can input a drive force to the drive input gear 51 from inside the room, thereby preventing the worker from getting wet with rainwater or the like when installing the water stop 30.

[0070] In particular, in this embodiment, the driving force input to the drive input gear 51 causes the moving portion 53 to move the engaging portion 55 between the engaged position and the disengaged position. In particular, at the engaged position, the engaging portion 55 sandwiches the vertical frame 21 and the vertical seal portion 42 from both sides between the engaging portion 55 and the waterstop 30 in the inward and outward directions, thereby stably compressing the vertical seal portion 42 and achieving watertight performance. Furthermore, at the disengaged position, the engaging portion 55 moves away from the vertical frame 21, preventing the engaging portion 55 from interfering with the removal of the waterstop 30.

[0071] Furthermore, in this embodiment, the movable portion 53 rotates the engaging portion 55, thereby easily moving the engaging portion 55 between the engaged position and the disengaged position. In particular, one surface of the engaging portion 55 is tapered toward the engaged position, which gradually increases the biasing force of the engaging portion 55 on the waterstop 30 toward the room, thereby enabling the vertical seal portion 42 to exhibit its sealing properties.

[0072] In addition, in this embodiment, when the engagement portion 55 abuts the fourth pin 64, the driving force input to the drive input gear 51 can be converted into a downward moving force for the water stop plate 30, in other words, a compression action of the lower seal portion 41.

[0073] Furthermore, in this embodiment, since the attachment mechanism 50 includes the operating handle 52, an operator can easily input a driving force to the drive input gear 51 by operating the operating handle 52, thereby performing the work of attaching the waterstop 30. Furthermore, compared to when the operating handle 52 is separate from the attachment mechanism 50, there is no need to lose the operating handle 52 or prepare a separate one.

[0074] Furthermore, in this embodiment, the water stop 30 can be easily attached to the frame body 20 by opening and closing the lid 211, and after closing the lid 211, the water stop 30 is locked in the engagement position of the engagement portion 55 (a position where the lower seal portion 41 can be compressed) by the locking mechanism, thereby maintaining the downward displacement of the water stop 30 and stably maintaining the sealing properties of the lower seal portion 41.

[0075] Furthermore, in this embodiment, the frame 20 supporting the waterstop 30 is located on the left and right outer sides of the opening H and below the opening H, as viewed from inside the room. In such a case, even if the waterstop 30 can be placed on the lower frame 22, it is difficult for women and elderly people to access the area where the vertical frame 21 and the lower frame 22 are close to the end of the waterstop 30, in other words, the area where the seal portion 40 is located. However, in this embodiment, the operating handle 52 (drive input gear 51) is exposed within the area of ​​the opening H. Simply by operating this operating handle 52, the engaging portion 55 engages with the waterstop-facing portion 21C of the vertical frame 21 outside the opening H, compressing the lower seal portion 41 and the vertical seal portion 42. Therefore, the burden on the worker required to realize the engaging action of this engaging portion 55 (the sealing action of the seal portion 40) can be greatly reduced.

[0076] <First Modified Embodiment> Fig. 12 is an enlarged front view of the water stopping structure for a building according to a first modified embodiment of the present invention, as seen from the indoor side, showing the engagement portion disposed in the engagement position. Fig. 13 is a plan view of the periphery of the restriction portion in the water stopping structure for a building according to this modified embodiment, showing the slider separated from the first gear. Fig. 14 is a front view of the periphery of the restriction portion in the water stopping structure for a building according to this modified embodiment, showing the slider separated from the first gear. Fig. 15 is a plan view of the periphery of the restriction portion in the water stopping structure for a building according to this modified embodiment, showing the slider engaged with the first gear. Fig. 16 is a front view of the periphery of the restriction portion in the water stopping structure for a building according to this modified embodiment, showing the slider engaged with the first gear.

[0077] This modified embodiment differs from the previous embodiment in that the attachment mechanism 50 has a restriction portion 70, as shown in Fig. 12. In the following explanation, this difference will be described, and explanation of other common points will be omitted. The same applies to modified embodiments described later.

[0078] The restricting portion 70 is attached to the inner surface of the waterstop 30. Specifically, the restricting portion 70 is disposed so as to face the outer periphery of the first gear 53A directly below the position where the drive input gear 51 and the first gear 53A engage with each other. For the sake of explanation, the restricting portion 70 is shown positioned upward in Figures 13 to 16.

[0079] The restricting portion 70 has a base 71 and a slider 72. The base 71 is fixed to the inner surface of the waterstop 30. A slot 71H is formed in the base 71. The slider 72 is supported on the base 71 so as to be slidable in the radial direction of the first gear 53A. For this purpose, the slider 72 is formed with a protrusion 72H that is inserted into the slot 71H. The slider 72 also has a lock gear 721 and an operating pin 722. The lock gear 721 is a gear tooth formed on the surface of the slider 72 that faces the first gear 53A. The operating pin 722 is operated by an operator to change the position of the slider 72. When an operator holds the operating pin 722 and moves the slider 72 from the position shown in FIGS. 13 and 14 to the position shown in FIGS. 15 and 16, the lock gear 721 engages with the first gear 53A. As a result, rotation of first gear 53A is prevented. Therefore, as in the previous embodiment, when engaging portion 55 is in the engaged position, an operator can operate slider 72 to prevent rotation of first gear 53A, thereby preventing rotation of second gear 53B and movement of engaging portion 55 to the disengaged position. This keeps waterstop 30 biased toward the interior and downward, allowing waterstop 30 to stably perform its water intrusion prevention function.

[0080] It should be noted that a spring (not shown) that biases the slider 72 toward the first gear 53A, or a fixing member that fixes the slider 72 at a position spaced apart from the first gear 53A may further be provided. Furthermore, when the restricting unit 70 is included, the structure of the lid 211 and the locking mechanism in the previous embodiment may not be included. Furthermore, as will be explained later, the operating handle 52 may be detachable, and may not be essential to the watertight structure.

[0081] <Second Modified Embodiment> Fig. 17 is an enlarged front view of a waterproof structure for a building according to a second modified embodiment of the present invention, seen from the indoor side, with the engagement portion disposed in the engagement position. Fig. 18 is a perspective view of an operating handle of the waterproof structure for a building according to this modified embodiment. Fig. 19 is an enlarged view (A) and (B) of the periphery of the engagement protrusion of the operating handle of Fig. 18.

[0082] This modified embodiment differs from the previous embodiment in that the attachment mechanism 50 does not have an operating handle 52. That is, a drive input gear 51 and a moving part 53 are pre-attached to the inner surface of the waterstop 30. Meanwhile, the operator only needs to separately prepare an operating handle 52M as shown in Figures 18 and 19. As an example, the operating handle 52M is a commercially available ratchet handle.

[0083] In this modified embodiment, an engagement hole 51H is arranged in the center of the drive input gear 51 and is exposed toward the interior of the room.

[0084] 19(A) and 19(B), an engagement protrusion 525 that can engage with the engagement hole 51H is disposed at the tip of the operating handle 52M. As an example, this structure has a rectangular shape, and can transmit the rotation of the operating handle 52M as rotation of the drive input gear 51.

[0085] Also housed inside operating handle 52M are a rotary gear 526 that can rotate integrally with engagement protrusion 525, and an engagement gear 527 that can allow or block rotation of rotary gear 526. Note that engagement gear 527 has the same structure as engagement gear 522 of the previous embodiment, and can be switched between Figures 9(A) and 9(B) by operating switching piece 52N of Figure 18.

[0086] Therefore, in this modified embodiment, an operator can prepare operating handle 52M, engage said operating handle 52M with drive input gear 51, and rotate engagement portion 55, as in the previous embodiment, to urge waterstop 30 toward the room and downward. Also, because multiple locations can be operated with one operating handle 52M, there is no need to attach multiple operating handles 52 to waterstop 30 in advance, and the weight of waterstop 30 can be reduced.

[0087] As explained in this modified embodiment, the operating handle 52 does not necessarily have to be attached to the waterstop 30. In this case, too, the structure including the lid 211 and latch 213 as described above, and the structure of the restricting part 70, can prevent the engaging part 55 from coming off and the waterstop 30 from floating up.

[0088] The above-described embodiments can be combined with each other. The water stopping device can have some or all of the features of the water stopping structure.

[0089] The above describes the water stopping structure and water stopping device for a building according to each embodiment of the present invention, but the present invention is not limited to this, and for example, the following modified embodiments can be adopted.

[0090] (1) In the above description, the engaging portion 55 rotates when moving between the engaging position and the disengaging position. However, the engaging portion 55 may slide left and right.

[0091] (2) In the above embodiments, the lower frame 22 is disposed at a predetermined height from the ground. However, the lower frame 22 may be installed on the ground. Furthermore, the water-stopping structure according to the present invention is not limited to residential buildings and may be applied to other buildings. Furthermore, the mounting mechanism 50 is not limited to being accessible from the inside of the room. Even if it is not accessible, the waterstop 30 can be installed from the inside by connecting the operating handle 52 and the engagement portion 55 via a gear or pulley (not shown) in application to a sliding door such as an automatic door. Furthermore, all or part of the mounting mechanism 50 may be disposed on the outer surface of the waterstop 30.

[0092] The first aspect of the present invention provides a water stop structure for a building that prevents water from entering the room through an opening in a wall of the building, the water stop structure including a pair of vertical frames extending in the up-down direction and a lower frame extending in the left-right direction and connecting the pair of vertical frames, and a frame body attached to the wall so as to surround the opening, a water stop plate that has a shape that can cover at least a lower portion of the opening and a left-right dimension that overlaps the pair of vertical frames in the inside-outside direction of the building and can be placed on the lower frame, and The waterstop mounting mechanism comprises a sealing portion including a pair of vertical sealing portions arranged in the up-down direction between a pair of vertical frames and the waterstop, and a lower sealing portion arranged in the left-right direction between the lower frame and the waterstop; and a waterstop mounting mechanism arranged on the waterstop, having a drive input portion and a biasing mechanism that receives a drive force input to the drive input portion to compress the pair of vertical sealing portions between the waterstop and the pair of vertical frames, while biasing the waterstop toward the room and downward, respectively, so as to compress the lower sealing portions between the waterstop and the lower frame.

[0093] In a second invention, in the first invention, the drive input portion of the waterstop mounting mechanism is arranged on a surface of the waterstop that faces the interior of the building.

[0094] The third invention is the first or second invention, wherein the biasing mechanism of the waterstop mounting mechanism has an engaging portion and a moving portion that is capable of receiving the driving force to move the engaging portion between an engaged position and a disengaged position, wherein the engaging position is a position where the engaging portion sandwiches the vertical frame and the vertical seal portion from both sides between the engaging portion and the waterstop in the inward / outward direction, and the disengaged position is a position where the engaging portion is separated from the vertical frame.

[0095] The fourth invention is the third invention, wherein the engaging portion is supported on the water stop plate so as to be rotatable around a central axis, and the moving portion receives the driving force to rotate the engaging portion between the engaging position and the disengaging position, and the surface of the engaging portion facing the vertical frame is tapered from the disengaging position toward the engaging position.

[0096] The fifth invention is the third invention, wherein the vertical frame has an abutment portion that abuts against the engagement portion at the engagement position, and is capable of moving the water stop downward by the driving force while preventing the engagement portion from moving upward.

[0097] The sixth invention is, in the first to fifth inventions, wherein the waterstop mounting mechanism further has an operating handle that is rotatably supported on the waterstop and receives operation to input a rotational driving force to the drive input portion.

[0098] The seventh invention is a device according to any one of the first to sixth inventions, wherein the frame body further comprises a lid portion supported on the vertical frame so as to be switchable between an open state and a closed state relative to the vertical frame, the open state being a state that allows the water stop to be placed on the lower frame, and the closed state being a state that prevents the water stop from being placed on the lower frame, and a locking mechanism that can lock the water stop so as to compress the lower seal portion when the lid portion is in the closed state.

[0099] The eighth invention provides a water stop device comprising: a frame body including a pair of vertical frames extending in the up-down direction and a lower frame extending in the left-right direction connecting the pair of vertical frames; a water stop plate having left-right dimensions such that it overlaps at least the pair of vertical frames and capable of being placed on the lower frame; a sealing portion including a pair of vertical sealing portions arranged in the up-down direction between the pair of vertical frames and the water stop plate, and a lower sealing portion arranged in the left-right direction between the lower frame and the water stop plate; and a water stop plate mounting mechanism arranged on the water stop plate and having a drive input portion and a biasing mechanism that receives a drive force input to the drive input portion to compress the pair of vertical sealing portions between the water stop plate and the pair of vertical frames, while biasing the water stop plate so as to compress the lower sealing portions between the water stop plate and the lower frame. [Explanation of symbols]

[0100] 10 Exterior Wall 11 Indoor wall 11A Wall body 11B Window Frame 12 Sash 14 Flooring 16 Shutter rail 20 Frame 21 Vertical Frame 21A Vertical frame body 21B outer extension 21C Water stop plate opposite part 211 Lid (lid part) 211S Lid fulcrum part 212 Latch guide 213 Latch (locking mechanism) 214 Spring 22 Bottom frame 30 Waterstop 40 Seal part 41 Lower seal 42 Vertical seal part 50 Mounting mechanism (waterstop mounting mechanism) 51 Drive input gear (drive input part) 51H engagement hole 52, 52M operating handle 521 Handle body 522 Engagement gear 525 Engagement protrusion 526 Rotating Gear 527 Engagement Gear 53 Moving part (biasing mechanism) 53A 1st gear 53B 2nd gear 55 Engagement part (biasing mechanism) 551 First end 552 Second end 61 First pin 62 2nd pin 63 Third pin 64 4th pin (contact part) 70 Regulatory Department 71 Pedestal 71H long hole 72 slider 721 Lock Gear 722 Operation pin 722 H Opening H W Wire W

Claims

1. A waterproof structure for a building that prevents water from entering the room through an opening in a wall of the building, a frame body attached to the wall portion so as to surround the opening, the frame body including a pair of vertical frames extending in the up-down direction and a lower frame extending in the left-right direction and connecting the pair of vertical frames; A water stop plate that can be placed on the lower frame and has a shape that can cover at least the lower portion of the opening and a left-right dimension that overlaps the pair of vertical frames in the inside-outside direction of the building; A sealing section including a pair of vertical sealing sections arranged along the up-down direction between the pair of vertical frames and the water stop plate on the indoor side of the pair of vertical frames, and a lower sealing section arranged along the left-right direction between the lower frame and the water stop plate; a waterstop mounting mechanism including: a drive input gear disposed on the waterstop and rotatably supported on the waterstop; and a biasing mechanism that receives a rotational driving force input to the drive input gear to compress the pair of vertical seal portions between the waterstop and the pair of vertical frames, and that biases the waterstop toward the room and downward so as to compress the lower seal portion between the waterstop and the lower frame; Equipped with The biasing mechanism includes: An engagement portion; A water-stopping structure for a building, comprising: a movable part having a gear with an outer diameter larger than the outer diameter of the drive input gear, and which receives the rotational driving force from the drive input gear and rotates relative to the waterstop, thereby moving the engaging part between an engaged position and a disengaged position, wherein the engaged position is a position where the engaging part sandwiches the vertical frame and the vertical seal part from both sides between the engaging part and the waterstop in the inward / outward direction, and the disengaged position is a position where the engaging part is separated from the vertical frame.

2. The waterproof structure for a building according to claim 1, A water stopping structure for a building, wherein the drive input gear of the water stop plate mounting mechanism is arranged on a surface of the water stop plate facing the interior of the building.

3. The waterproof structure for a building according to claim 1, The engaging portion is supported by the waterstop plate so as to be rotatable about a central axis, the moving portion receives the rotational drive force and rotates the engaging portion between the engaging position and the disengaging position, A waterproof structure for a building, wherein the surface of the engaging portion facing the vertical frame is tapered from the disengaged position toward the engaged position.

4. The waterproof structure for a building according to claim 1, A water-stopping structure for a building, wherein the vertical frame has an abutment portion that abuts the engagement portion at the engagement position, and the abutment portion is capable of moving the water stop plate downward by the rotational driving force while preventing the engagement portion from moving upward.

5. The waterproof structure for a building according to claim 1, The waterstop structure for a building, wherein the waterstop mounting mechanism is rotatably supported on the waterstop and further has an operating handle that receives operation for inputting the rotational driving force to the drive input gear.

6. The waterproof structure for a building according to claim 1, The frame body is A lid portion supported on the vertical frame so as to be switchable between an open state and a closed state relative to the vertical frame, the open state being a state that allows the waterstop to be placed on the lower frame, and the closed state being a state that prevents the waterstop from being placed on the lower frame; a locking mechanism capable of locking the waterstop so as to compress the lower seal portion when the lid portion is closed; The waterproof structure of the building further comprises:

7. A water-stopping structure for a building that prevents water from entering the room through an opening in a wall of the building, a frame body attached to the wall portion so as to surround the opening, the frame body including a pair of vertical frames extending in the up-down direction and a lower frame extending in the left-right direction and connecting the pair of vertical frames; A water stop plate that can be placed on the lower frame and has a shape that can cover at least the lower portion of the opening and a left-right dimension that overlaps the pair of vertical frames in the inside-outside direction of the building; A sealing section including a pair of vertical sealing sections arranged along the up-down direction between the pair of vertical frames and the water stop plate on the indoor side of the pair of vertical frames, and a lower sealing section arranged along the left-right direction between the lower frame and the water stop plate; a waterstop mounting mechanism that is disposed on the waterstop and has a drive input portion and a biasing mechanism that receives a drive force input to the drive input portion to compress the pair of vertical seal portions between the waterstop and the pair of vertical frames, and that biases the waterstop toward the room and downward so as to compress the lower seal portion between the waterstop and the lower frame; Equipped with The biasing mechanism of the waterstop mounting mechanism is an engaging portion supported on the waterstop plate so as to be rotatable about a central axis; a moving unit that receives the driving force and can rotate the engaging unit between an engaging position and a disengaging position, the engaging position being a position where the engaging unit sandwiches the vertical frame and the vertical seal unit from both sides between the engaging unit and the waterstop in the inward / outward direction, and the disengaging position being a position where the engaging unit is separated from the vertical frame, A waterproof structure for a building, wherein the surface of the engaging portion facing the vertical frame is tapered from the disengaged position toward the engaged position.

8. a frame body including a pair of vertical frames extending in the up-down direction and a lower frame extending in the left-right direction and connecting the pair of vertical frames; A water stop plate that has a left-right dimension that overlaps at least the pair of vertical frames in a predetermined direction that intersects each of the vertical and left-right directions and can be placed on the lower frame; A sealing section including a pair of vertical sealing sections arranged along the up-down direction between the pair of vertical frames and the waterstop, and a lower sealing section arranged along the left-right direction between the lower frame and the waterstop; a waterstop mounting mechanism including: a drive input gear disposed on the waterstop and rotatably supported on the waterstop; and a biasing mechanism that receives a rotational driving force input to the drive input gear to compress the pair of vertical seal portions between the waterstop and the pair of vertical frames, and biases the waterstop so as to compress the lower seal portion between the waterstop and the lower frame; Equipped with The biasing mechanism includes: An engagement portion; A water stopping device comprising: a moving part having a gear with an outer diameter larger than the outer diameter of the drive input gear, and which receives the rotational driving force from the drive input gear and rotates relative to the water stop plate, thereby moving the engaging part between an engaged position and a disengaged position, wherein the engaging position is a position where the engaging part sandwiches the vertical frame and the vertical seal part from both sides between the engaging part and the water stop plate in the specified direction, and the disengaged position is a position where the engaging part is separated from the vertical frame.

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