Water-resistant wall openings

Abstract

To provide flood prevention structure for a wall opening capable of quickly preventing water from penetrating upon flood disaster while avoiding disfigurement of appearance near the wall opening.SOLUTION: A house 10 comprises a window opening 16 formed in an outer wall 12, and a window frame 21 arranged in the window opening 16. The window frame 21 has a pair of vertical frame portions 22a, 22b. The house 10 has a cut-off sheet 41. The cut-off sheet 41 prevents water into a habitable room 11 through the window opening 16 from penetrating, by being brought into developed state in which the cut-off sheet 41 seals a lower area 16a of the window opening 16. A housing space 31 extending in a vertical direction along the vertical frame portion 22a is formed inside the outer wall 12. The housing space 32 can house the cut-off sheet 41 in a wound-up state. The housing space 31 is opened toward a side of the window opening 16 by detaching the vertical frame portion 22a.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a water-proof structure for a wall opening. [Background technology]

[0002] In recent years, flooding of buildings and the like has frequently occurred due to rivers bursting their banks following torrential rain. As a countermeasure against flooding into buildings, water-stopping structures to be installed at openings in buildings have been proposed. For example, the water-stopping structure of Patent Document 1 prevents water from flooding into the building through an opening (for example, a front door) by installing a detachable water stop plate on the interior side of the opening. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2021-59880 Summary of the Invention [Problem to be solved by the invention]

[0004] It is desirable to install the above-mentioned water stop structure quickly when a flood occurs. For this reason, it is considered convenient to store the components that make up the water stop structure, such as the water stop plate, near the wall near the opening under normal circumstances. However, doing so may cause the stored components to spoil the aesthetic appearance of the area near the opening.

[0005] The present invention has been made in consideration of the above circumstances, and its main purpose is to provide a water-proof structure for a wall opening that can quickly prevent water from entering in the event of a flood while avoiding damaging the aesthetic appearance of the area around the wall opening. [Means for solving the problem]

[0006] The water-proof structure for a wall opening of the first invention is applicable to a building, and comprises a wall opening formed in a partition wall and an opening frame provided in the wall opening, the opening frame having as its frame portions a pair of vertical frame portions provided on the side edges of the wall opening and an upper frame portion provided on the upper edge of the wall opening, and is provided with a water-stop sheet that prevents water from entering through the wall opening when it is deployed to close at least the lower region of the wall opening, and is characterized in that a storage space is formed inside the partition wall that extends along the frame portion and is covered from the wall opening side by the frame portion, and is capable of storing the water-stop sheet in a rolled up or folded state, and the frame portion covering the storage space is a first frame portion that is provided in a removable or movable manner, and when the first frame portion is removed or moved, the storage space is opened to the wall opening side.

[0007] According to the first aspect of the present invention, in the event of a flood, the waterstop sheet can be deployed to close a predetermined opening area of ​​the wall opening, thereby preventing water from entering through the wall opening. Furthermore, a storage space is formed inside the partition wall, covered from the wall opening side by a frame (first frame), and the waterstop sheet can be stored in the storage space in a rolled up or folded state under normal circumstances. This prevents the aesthetic appearance of the area around the wall opening from being marred.

[0008] Furthermore, the first frame portion of the opening frame provided in the wall opening, which covers the storage space, is removable or movable. In this case, by removing or moving the first frame portion, the storage space can be opened toward the wall opening. Therefore, in the event of a flood, the waterproof sheet can be pulled out from the storage space and quickly deployed. This allows for rapid flood prevention.

[0009] The water ingress prevention structure for a wall opening of a second invention is characterized in that, in the first invention, the first frame portion is the vertical frame portion.

[0010] According to the second aspect of the present invention, the first frame is a vertical frame, and the storage space can be opened by removing or moving the vertical frame. Removing or moving the upper frame is considered to be a difficult task because the upper frame is located near the ceiling, but the above configuration makes the task relatively easy. Therefore, in the event of a flood, the storage space can be quickly opened and the waterproof sheet can be deployed.

[0011] The water-proof structure for a wall opening of the third invention is characterized in that, in the first or second invention, the water-stop sheet is stored in the storage space in the rolled up or folded state along the first frame portion, and one end of the water-stop sheet is fixed inside the storage space, and when the storage space is opened, the other end can be pulled out of the storage space and transitioned to the unfolded state.

[0012] According to the third aspect of the present invention, the first frame is removed or moved to open the storage space, and then the other end of the waterproof sheet is pulled out from the storage space, allowing the waterproof sheet to be deployed. This allows for quicker water intrusion prevention in the event of a flood.

[0013] The water-proof structure for a wall opening of the fourth invention is characterized in that, in the third invention, the first frame portion is a first vertical frame portion which is one of the vertical frame portions, and the other vertical frame portion is a second vertical frame portion, the other end of the water-stop sheet is fixed to the first vertical frame portion, the first vertical frame portion is removable, and the water-stop sheet can be transitioned to the expanded state by moving the removed first vertical frame portion to a position adjacent to the second vertical frame portion.

[0014] According to the fourth aspect of the present invention, the other end of the waterproof sheet is fixed to the first vertical frame portion, and the waterproof sheet can be placed in an unfolded state by removing the first vertical frame portion and moving it to a position adjacent to the second vertical frame portion. In this case, by fixing the first vertical frame portion to the second vertical frame portion, the unfolded state of the waterproof sheet can be easily maintained.

[0015] The water-proof structure for a wall opening of the fifth invention is characterized in that the partition wall is an exterior wall that separates indoors from outdoors, and the wall opening is formed in the exterior wall.

[0016] According to the fifth aspect of the present invention, a water-proof structure is provided at the wall opening separating the indoors and outdoors, so that water can be suitably prevented from entering the building. [Brief explanation of the drawings]

[0017] [Figure 1] View of the window opening from the living room side. [Figure 2] FIG. 4 is a cross-sectional view showing the configuration in the vicinity of a window opening. [Figure 3] Cross-sectional view showing the steps for preventing flooding. [Figure 4] Cross-sectional view showing the steps for preventing flooding. [Figure 5] A view of the window opening from the living room side with the waterproof sheet in the unfolded state. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, one embodiment of the present invention will be described with reference to the drawings. A house 10 of this embodiment has a living space, ie, a room 11. Figures 1 and 2 show a window opening 16 as viewed from the living room 11 side.

[0019] As shown in Figures 1 and 2, a house 10 has an exterior wall 12 that separates a living room 11 from the outdoors. A window opening 16 that connects the living room 11 to the outdoors is formed in the exterior wall 12. The window opening 16 is a bay window that extends from the floor surface of a floor portion 13 of the living room 11 toward a ceiling portion 14 and is rectangular in front view. The window opening 16 corresponds to a wall opening, and the exterior wall 12 corresponds to a partition wall.

[0020] A sash frame 18 and a window frame 21 are provided around the periphery of the window opening 16. The sash frame 18 and the window frame 21 are both formed in a rectangular frame shape and are arranged side by side in the indoor-outdoor direction. The sash frame 18 is arranged on the outdoor side, and the window frame 21 is arranged on the indoor side. The window frame 21 corresponds to the opening frame.

[0021] Sash doors 19 are provided in the sash frame 18 so that they can be opened and closed. A plurality of sliding sash doors 19 are provided, and these sash doors 19 are glass doors that can slide along the width direction of the window opening 16.

[0022] The window frame 21 has a pair of vertical frame portions 22 provided on each side edge 17 of the window opening 16, an upper frame portion 24 provided on an upper edge 23 of the window opening 16, and a lower frame portion 26 provided on a lower edge 25 of the window opening 16. Each vertical frame portion 22 is disposed between the upper frame portion 24 and the lower frame portion 26.

[0023] In this embodiment, the window opening 16 is provided with a water ingress prevention structure that prevents water from entering the living room 11 from the outside through the window opening 16. The configuration of the water ingress prevention structure will be described below with reference to Figures 1 and 2.

[0024] 1 and 2, the exterior wall 12 has an exterior wall surface material 33 provided facing the outdoors and an interior wall surface material 32 provided facing the living room 11. The exterior wall surface material 33 is made of, for example, a ceramic siding board, and the interior wall surface material 32 is made of, for example, a gypsum board. The exterior wall surface material 33 and the interior wall surface material 32 are arranged facing each other and spaced apart in the indoor / outdoor direction.

[0025] An accommodation space 31 capable of accommodating a waterproof sheet 41 (described later) is provided inside the exterior wall 12. The accommodation space 31 is adjacent to one of the vertical frame portions 22a of each vertical frame portion 22 and the inner wall surface member 32, and is a vertically elongated space extending vertically along the vertical frame portion 22a. The accommodation space 31 is covered by the vertical frame portion 22a from the window opening 16 side, and is covered by the inner wall surface member 32 from the living room 11 side. More specifically, a vertical frame 34 extending in the vertical direction is fixed to the back surface side of the inner wall surface member 32, and the vertical frame 34 is arranged facing the vertical frame portion 22a and the inner wall surface member 32 at a distance in the wall width direction. The accommodation space 31 is defined between the opposing vertical frame portion 22a and the vertical frame 34.

[0026] A cover member 35 extending vertically along the vertical frame portion 22a is provided in the storage space 31. The cover member 35 extends over the entire vertical area of ​​the vertical frame portion 22a. The cover member 35 is generally cylindrical, and more specifically, generally rectangular cylindrical. The cover member 35 is fixed to the inner wall surface material 32 with its outer surface abutting against the inner wall surface material 32 and the vertical frame portion 22a. The cover member 35 also has a slit portion 36 that connects the inside and outside of the cover member 35. The slit portion 36 extends vertically and faces the vertical frame portion 22a.

[0027] A substantially cylindrical pole 38 extending vertically along the vertical frame portion 22a is provided in the accommodation space 31. The pole 38 is provided inside the cover member 35 and is capable of rotating in the circumferential direction.

[0028] A waterproof sheet 41 is provided in the accommodation space 31. The waterproof sheet 41 is made of a waterproof, substantially rectangular sheet material. The waterproof sheet 41 is stored in a rolled-up state in the accommodation space 31. In the event of a flood, the waterproof sheet 41 is deployed over the window opening 16 to prevent water from entering the room 11 from the outside through the window opening 16 (see Figure 5).

[0029] The waterproof sheet 41 is wound around the pole 38 and housed inside the cover member 35. More specifically, the waterproof sheet 41 is wound around the pole 38 with its short side facing up and down. In this case, the waterproof sheet 41 is housed inside the cover member 35 (and thus the housing space 31) so that it extends up and down along the vertical frame portion 22a. The length of the waterproof sheet 41 in the up and down direction (short side direction) is equal to or less than half the height of the window opening 16. When housed in the housing space 31, the bottom end of the waterproof sheet 41 is located at approximately the same height as the bottom end of the window opening 16, and the top end is located at approximately the same height as the middle of the window opening 16.

[0030] One longitudinal end of the water stop sheet 41 is fixed to the pole 38. Therefore, the one end of the water stop sheet 41 is fixed inside the accommodation space 31. The other longitudinal end of the water stop sheet 41 protrudes outside the cover member 35 through the slit portion 36 and is fixed to the vertical frame portion 22a. The slit width of the slit portion 36 is approximately the same as the thickness dimension of the water stop sheet 41.

[0031] Next, the procedure for preventing water from entering through the window opening 16 by deploying the waterstop sheet 41 in the event of a flood will be described with reference to Figures 3 to 5. For ease of explanation, the waterstop sheet 41 is shown with dot hatching in Figure 5.

[0032] The vertical frame portion 22a is removably attached to the side edge 17 of the window opening 16. The vertical frame portion 22a is fastened to the side edge 17 of the window opening 16 with screws 43. More specifically, the vertical frame portion 22a has a plurality of screw holes 45 formed at predetermined intervals in the vertical direction, and screws 43 are threaded through these screw holes 45 into a cover member 35 attached to the side edge 17. This makes it possible to remove the vertical frame portion 22a from the cover member 35 by removing the screws 43.

[0033] To prevent water from entering, first remove the screws 43 to remove the vertical frame portion 22a from the side edge portion 17. As a result, the storage space 31 is opened to the window opening 16, as shown in Figure 3. The vertical frame portion 22a corresponds to the first frame portion.

[0034] Next, the vertical frame portion 22a is moved toward the other vertical frame portion 22 (hereinafter referred to as the vertical frame portion 22b). As a result, the water stop sheet 41 follows the vertical frame portion 22a and is pulled out from the accommodation space 31 (cover member 35). At this time, the water stop sheet 41 is unrolled by the rotation of the pole 38 in the circumferential direction, and is unfolded while sliding against the inner circumferential surface of the slit portion 36.

[0035] Then, as shown in FIG. 4, the vertical frame portion 22a is moved to a position adjacent to the vertical frame portion 22b. Specifically, the vertical frame portion 22a is moved to a position adjacent to the window opening 16 side of the vertical frame portion 22b. Then, as shown in FIG. 5, the water stop sheet 41 enters an expanded state that closes the lower region 16a of the window opening 16. In this way, with this water intrusion prevention structure, the water stop sheet 41 can be placed in an expanded state by removing the vertical frame portion 22a from the cover member 35 and moving it to a position adjacent to the vertical frame portion 22b. This makes it possible to prevent water from entering the room 11 through the window opening 16. The vertical frame portion 22a corresponds to the first vertical frame portion, and the vertical frame portion 22b corresponds to the second vertical frame portion.

[0036] Next, the vertical frame portion 22a is fixed to the vertical frame portion 22b. Specifically, the vertical frame portion 22b has screw holes 46 at positions corresponding to the screw holes 45 of the vertical frame portion 22a. The vertical frame portion 22a is fixed to the vertical frame portion 22b by threading the screws 43 through the screw holes 45 of the vertical frame portion 22a into the screw holes 46 of the vertical frame portion 22b (see FIG. 4). This allows the waterstop sheet 41 to be maintained in an unfolded state.

[0037] Next, the boundary between the water stop sheet 41 and the lower frame portion 26 is sealed with waterproof tape 48 such as butyl tape. The waterproof tape 48 is provided over the entire boundary and is attached to both the water stop sheet 41 and the lower frame portion 26. This ensures watertightness between the water stop sheet 41 and the lower frame portion 26. Similarly, the boundary between the slit portion 36 and the water stop sheet 41 and the boundary between each vertical frame portion 22a, 22b should also be covered with waterproof tape 48. This ensures watertightness at these boundaries.

[0038] According to the above-described embodiment, the following excellent effects can be obtained.

[0039] According to the above embodiment, in the event of a flood, the water stop sheet 41 can be deployed to close the lower region 16a of the window opening 16, thereby preventing water from entering the room 11 through the window opening 16. Furthermore, inside the exterior wall 12, a storage space 31 is formed that is covered from the window opening 16 side by the vertical frame portion 22a and from the room 11 side by the inner wall surface material 32, and under normal circumstances, the water stop sheet 41 can be stored in a rolled-up state in this storage space 31. This makes it possible to avoid damaging the aesthetic appearance around the window opening 16.

[0040] Furthermore, the vertical frame portion 22a of the window frame 21 provided in the window opening 16, which covers the storage space 31, is removable. In this case, by removing the vertical frame portion 22a, the storage space 31 can be opened to the window opening 16 side. Therefore, in the event of a flood, the waterproof sheet 41 can be pulled out from the storage space 31 and quickly deployed, thereby enabling rapid water intrusion prevention.

[0041] According to the above embodiment, the vertical frame portion 22a is removable, and therefore, by removing the vertical frame portion 22a, the storage space 31 can be opened. Removing the upper frame portion 24 is considered to be a difficult task because the upper frame portion 24 is located at a height close to the ceiling, but the above configuration makes the task relatively easy. Therefore, in the event of a flood, the storage space 31 can be quickly opened and the waterproof sheet 41 can be deployed.

[0042] According to the above embodiment, the storage space 31 is opened by removing the vertical frame portion 22a from the side edge portion 17, and then the other end of the waterstop sheet 41 is pulled out from the storage space 31 (cover member 35), thereby allowing the waterstop sheet 41 to transition to the unfolded state. This allows for quicker water intrusion prevention in the event of a flood.

[0043] According to the above embodiment, the other end of the water stop sheet 41 is fixed to the vertical frame portion 22a, and the water stop sheet 41 can be moved to the unfolded state by removing the vertical frame portion 22a and moving it to a position adjacent to the vertical frame portion 22b. In addition, by fixing the vertical frame portions 22 together with screws 43 or the like, the unfolded state of the water stop sheet 41 can be easily maintained.

[0044] According to the above embodiment, a water-proof structure is provided at the window opening 16 provided in the exterior wall 12. This makes it possible to effectively prevent water from entering the house 10.

[0045] According to the above embodiment, the waterproof sheet 41 is stored in the storage space 31 in a state where it is wound up around the pole 38 that extends vertically along the vertical frame portion 22a. This makes it easy to hold the waterproof sheet 41 in an orientation that follows the vertical frame portion 22a. Furthermore, since it is possible to prevent the waterproof sheet 41 from being creased, the condition of the waterproof sheet 41 can be maintained in better condition.

[0046] According to the above embodiment, the vertical frame portion 22a is secured to the cover member 35 provided on the side edge portion 17 with screws 43. In other words, the cover member 35 that houses the waterproof sheet 41 also serves as a base for securing the vertical frame portion 22a to the side edge portion 17. This allows the vertical frame portion 22a to be secured to the side edge portion 17 in an appropriate manner.

[0047] The present invention is not limited to the above-described embodiment, and may be implemented, for example, as follows.

[0048] (1) In the above embodiment, the water stop sheet 41 is stored in the storage space 31 in a rolled up state, but this is not limited to this. The water stop sheet may also be stored in the storage space in a folded state. In this case, the water stop sheet is preferably stored along the first frame portion in a state where it is folded outward multiple times in the unfolding direction. Furthermore, it is preferable that one end of the water stop sheet is fixed inside the storage space, and it is considered to be fixed to, for example, the back surface (the surface facing the storage space) of the wall material of the partition wall. Note that there is no particular limitation on the way the water stop sheet is folded, as long as it can be stored in the storage space.

[0049] (2) In the above embodiment, the water stop sheet 41 has each side end fixed to the pole 38 and the vertical frame portion 22a, respectively, and is deployed by moving the vertical frame portion 22a to a position adjacent to the vertical frame portion 22b. However, this is not limited to this. For example, the water stop sheet does not have to be secured to the first frame portion, and the water stop sheet may be directly grasped and pulled out (deployed). Also, the water stop sheet may not have each side end fixed to anything. For example, the water stop sheet may be stored in a storage space in a folded state, and in the event of a flood, the entire water stop sheet may be removed from the storage space and used.

[0050] (3) In the above embodiment, the window frame 21 includes a pair of vertical frame portions 22, an upper frame portion 24, and a lower frame portion 26, but this is not limited thereto. The opening frame may include a pair of vertical frame portions and an upper frame portion; the lower frame portion is not a required component. In addition, in the above embodiment, the upper frame portion 24 is provided above each vertical frame portion 22, but the upper frame portion 24 may be disposed between the upper ends of the vertical frame portions 22. In this case, the upper frame portion 24 is removed before the vertical frame portion 22a is removed. After the upper frame portion 24 is removed from the upper edge portion 23 of the window opening 16, it is preferably placed on the lower frame portion 26 and sandwiched between the moved vertical frame portion 22a and the side edge portion 17. In this case, the upper frame portion 24 is preferably fixed to the lower frame portion 26 using waterproof tape 48, screws, or the like. This effectively prevents the vertical frame portions 22 from separating from each other and prevents the waterstop sheet 41 from bending toward the living room 11 due to water pressure.

[0051] (4) In the above embodiment, the storage space 31 is provided along the vertical frame portion 22a, but this is not limited thereto. The storage space may be provided along the upper frame portion 24 or the lower frame portion 26. In these cases, the upper frame portion or the lower frame portion corresponds to the first frame portion. Furthermore, the shape of the storage space 31 is not particularly limited as long as it can accommodate a water-stop sheet. The shape of the cover member 35 is not limited to a rectangular tube, and may be, for example, cylindrical. The cover member 35 does not need to extend over the entire vertical area of ​​the vertical frame portion 22a, as long as it can accommodate a water-stop sheet. However, the configuration of the above embodiment is desirable in terms of being able to suitably fix the vertical frame portion. The cover member 35 is not an essential component.

[0052] (5) In the above embodiment, the water stop sheet 41 is configured to cover the lower region 16a of the window opening 16 (specifically, only the lower region 16a), but this is not limited to this. For example, the vertical dimension of the water stop sheet 41 may be approximately the same as the vertical dimension of the window opening 16, so that the water stop sheet 41 covers the entire window opening 16. In short, the water stop sheet 41 may be of any size as long as it is able to cover at least the lower region 16a of the window opening 16.

[0053] (6) In the above embodiment, the vertical frame portion 22a is provided so as to be removable, but this is not limiting. For example, the first frame portion may be attached to the partition wall via a pivot shaft, and the storage space may be opened by pivoting the first frame portion. Alternatively, the first frame portion may be attached to the partition wall so as to be slidable, and the storage space may be opened by sliding the first frame portion.

[0054] (7) In the above embodiment, the vertical frame portion 22a is configured to be detachable in its entirety, but this is not limited to this. For example, the first frame portion may be divided in the middle in the longitudinal direction, and only the lower portion may be detachable or movable.

[0055] (8) In the above embodiment, the waterproof tape 48 or the like is used to ensure the watertightness of the water-blocking structure, but the method for ensuring the watertightness is not particularly limited. For example, a portion of the lower end of the waterstop sheet may be folded toward the living room and placed on the lower frame, and a weight may be placed on the portion of the waterstop sheet above the lower frame. The weight may be, for example, a weight member made of a metal material, or, in a configuration in which the upper frame is detachably attached to the upper edge, the removed upper frame may be used.

[0056] (9) In the above embodiment, the water-ingress prevention structure of the present invention is applied to the window opening 16 consisting of a French window, but the present invention may also be applied to a door opening (corresponding to a wall opening) such as a front door or a service door with a door. Furthermore, the water-ingress prevention structure of the present invention does not necessarily have to be applied to a window opening 16 or door opening, i.e., an entrance, through which people can enter and exit, but may also be applied to a window portion (corresponding to a wall opening) through which people cannot enter and exit.

[0057] Furthermore, the water ingress prevention structure of the present invention may be applied not only to wall openings formed in the exterior wall 12, but also to doorways (corresponding to wall openings) formed in partition walls (corresponding to partition walls) within the house 10. Such doorways may also have opening frames on their peripheries, in which case the present invention may be applied. With such a configuration, if water ingress occurs inside the house 10, it is possible to prevent the water from entering the back of the house 10 through the doorways.

[0058] (10) The building to which the present invention is applied is not limited to a residential building, nor is it limited to a modular building, but may be a building constructed using a steel frame construction method, a building constructed using a conventional wooden construction method, or any other building. [Explanation of symbols]

[0059] 10...house as building, 12...exterior wall as partition wall, 16...window opening as wall opening, 16a...lower region, 17...side edge portion, 21...window frame as opening frame, 22a...vertical frame portion as first frame portion and first vertical frame portion, 22b...vertical frame portion as second vertical frame portion, 23...upper edge portion, 24...upper frame portion, 31...storage space, 41...waterproof sheet.

Claims

1. A wall opening formed in an exterior wall separating indoors and outdoors, and an opening frame provided in the wall opening, The opening frame is applied to a building having, as its frame portion, a pair of vertical frame portions provided on the side edges of the wall opening and an upper frame portion provided on the upper edge of the wall opening, A water-blocking structure for a wall opening, comprising a water-stop sheet that is in an expanded state to close at least a lower region of the wall opening, thereby preventing water from entering through the wall opening, An accommodation space is formed inside the outer wall, which extends along the frame portion and is covered by the frame portion from the wall opening side, and which can accommodate the water stop sheet in a rolled up or folded state, the frame portion covering the accommodation space is a first frame portion that is provided in a removable or movably manner, A water-proof structure for a wall opening, characterized in that the storage space is opened to the wall opening side by removing or moving the first frame portion.

2. The water intrusion prevention structure for a wall opening according to claim 1, wherein the first frame portion is the vertical frame portion.

3. The water stop sheet is accommodated in the accommodation space along the first frame portion in the rolled up state or the folded state, A water-blocking structure for a wall opening as described in claim 1 or 2, characterized in that one end of the water-blocking sheet is fixed inside the storage space, and when the storage space is opened, the other end can be pulled out of the storage space and transitioned to the expanded state.

4. The first frame portion is a first vertical frame portion that is one of the vertical frame portions, and the other vertical frame portion is a second vertical frame portion, The other end of the waterproof sheet is fixed to the first vertical frame portion, The water-blocking structure for a wall opening described in claim 3, characterized in that the first vertical frame portion is removable, and the water-blocking sheet can be transitioned to the expanded state by moving the removed first vertical frame portion to a position adjacent to the second vertical frame portion.

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