Draining member

Abstract

To restrain infiltration of water via a vent hole in flooded below floor level only by installing a throating member.SOLUTION: A throating member includes a body part which is attached to a building skeleton and in which a vent hole is formed, an attachment / detachment part which is detachably attached to the body part, and a water expansion material which is arranged in the attachment / detachment part and whose volume is expanded by absorbing water to close the vent hole.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a flashing member for a building. [Background technology]

[0002] Conventionally, a water-repellent member has been installed on the foundation so as to surround the perimeter of a building. In recent years, a ventilation path opening and closing structure has been proposed in which a water-absorbing volumetric expansion material (water-expansion material) is installed between the water-repellent member and the foundation packing to prevent water from entering the space under the floor through a foundation packing with ventilation holes installed on the foundation when water inundates the space under the floor (see Patent Document 1). The water-expansion material expands when water inundates the foundation and closes the ventilation path to the foundation packing, but opens the ventilation path when it does not expand. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6532774 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1 above, in order to block the ventilation path, it is necessary to fix a rising surface, storage tank or blocking section separate from the drainage member onto the foundation, which poses the problem of cumbersome construction work such as installation work.

[0005] Therefore, an object of the present invention is to provide a drainage member that can prevent water from entering through air vents when water floods under the floor simply by attaching the drainage member. [Means for solving the problem]

[0006] The water drainage member of the present invention comprises a main body portion that is attached to the building structure and has an air vent formed therein, a detachable portion that can be attached and detached freely to the main body portion, and a water-expanding material that is placed in the detachable portion and expands in volume by absorbing water, thereby closing the air vent.

[0007] This allows ventilation between the building and the outdoors through the vents before the water-expansive material absorbs water, and then closes the vents once the material absorbs water. Therefore, simply installing the drainage member can prevent water from seeping under the floor in the event of flooding. Furthermore, the water-expansive material can be removed along with its detachable section, making it easy to replace.

[0008] In the present invention, it is preferable that the detachable portion is detachably attached to the main body portion so as to cover the vent hole from the outdoor side of the building skeleton.

[0009] In addition, in the present invention, it is preferable that the detachable part has an air vent formed facing the outdoor side of the building structure, and that the water-expansion material is arranged in an air passage connecting the air vent of the main body part and the air vent of the detachable part. [Effects of the Invention]

[0010] The water-repellent material of the present invention allows ventilation between the building frame and the outdoors through the vents before the water-expansive material absorbs water, and the vents close once the water-expansive material absorbs water. Therefore, simply installing the water-repellent material can prevent water from entering under the floor when flooding occurs. In addition, the water-expanding material can be removed along with the detachable part, making it easy to replace the water-expanding material. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic cross-sectional view showing a state in which a drainage member according to one embodiment of the present invention is attached to a building frame. [Figure 2] FIG. 2 is a side view of the drainer member shown in FIG. [Figure 3]3(a) is a side view of the main body portion shown in FIG. 2, and FIG. 3(b) is a side view of the detachable portion shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] A flashing member 1 according to one embodiment of the present invention will be described below with reference to Figures 1 to 3. Figure 1 shows a flashing member according to one embodiment of the present invention attached to a base, which is part of a building skeleton. The building skeleton 100 in this embodiment includes a foundation 101, a foundation packing 102, and a base 103 that support a building (not shown).

[0013] The foundation 101 rises from the ground and extends longitudinally in a direction A perpendicular to the plane of the paper in FIG. 1 . Decorative mortar (not shown) is formed on the outdoor side of the foundation 101. The foundation packing 102 is formed longitudinally along the direction A and is installed on the foundation 101. The foundation packing 102 is also formed with a plurality of vent holes 102a for connecting the outdoor side with the indoor side. The plurality of vent holes 102a are formed spaced apart from one another along the direction A. The base 103 is also formed longitudinally along the direction A and is installed on the foundation packing 102. A plurality of flashing members 1 for preventing the infiltration of rainwater and the like are attached to the outdoor side 103a of the base 103, lined up along the direction A. Each flashing member 1 is attached to the base 103 with a protrusion 19 (both of which will be described later) abutting against the base 101 via a water-stopping material 41.

[0014] As shown in Figure 2, the flashing member 1 in this embodiment has an attachment portion 11, an extension portion 12, a front drape portion 13, a storage portion 14, and a water-expanding material 30, all of which are formed long in direction A. The following description of the flashing member 1 will refer to its outdoor side as the front and its indoor side as the rear. Direction A is a horizontal direction that is perpendicular to the front-to-rear direction B.

[0015] The mounting portion 11 is a plate-like portion formed in a vertical plane along the up-down direction C. The mounting portion 11 is attached to the base 103 with a nail or the like, with its upper end aligned with a line drawn on the side surface 103a of the base 103. The extension portion 12 is a plate-like portion that extends obliquely downward toward the front side from the lower part of the mounting portion 11. This makes it possible to guide rainwater that falls onto the extension portion 12 from an exterior wall material (not shown) formed on the side surface 103a of the base 103 toward the front hanging portion 13 side.

[0016] As shown in Fig. 2, the front overhang portion 13 is a plate-like portion extending vertically downward from the front end of the extension portion 12. In this embodiment, the drainer 1 has a main body portion 2 and a detachable portion 3 that is detachable from the main body portion 2. As shown in Fig. 3(a), the main body portion 2 has an attachment portion 11, the extension portion 12, a front plate portion 13a, a lower plate portion 21, a connecting plate portion 22, a rear wall portion 16, a protruding portion 19, and a water-stopping material 41. As shown in Fig. 3(b), the detachable portion 3 has a front plate portion 13b, a connecting plate portion 31, a front wall 15, a bottom wall 17, and a water-expansion material 30.

[0017] As shown in Fig. 2, the front plate 13a of the main body 2 is a plate-like portion formed in a vertical plane along the up-down direction C. The front plate 13a is connected to the front end of the extension 12 of the main body 2 and the front end of the lower plate 21. The front plate 13b of the detachable part 3 is a plate-like portion formed in a vertical plane along the up-down direction C. The front flap part 13 is formed by attaching the detachable part 3 to the main body 2 and connecting these front plates 13a and 13b vertically.

[0018] As shown in Figure 2, the storage section 14 is provided below the extension section 12 and behind the front hanging section 13. The storage section 14 has a front wall 15, a rear wall 16, a bottom wall 17, an upper wall 18, and a storage space S surrounded by these walls 14 to 18. These walls 14 to 18 are formed to extend along the entire length of the drainer member 1 in direction A.

[0019] As shown in FIG. 2, the lower plate 21 of the main body 2 has a facing portion 21a facing the connecting plate 31 of the detachable part 3, and a rear portion 21b located rearward of the facing portion 21a. A through hole 21a1 is formed in the facing portion 21a. A female thread is formed on the inner peripheral surface of the through hole 21a1. The upper wall 18 of the storage part 14 is formed by the rear portion 21b. Five protrusions 18a protruding downward are formed on the lower surface of the upper wall 18 (the lower surface of the rear portion 21b). These protrusions 18a extend along the entire length of the drainer member 1 in direction A. The connecting plate 22 of the main body 2 connects the rear end of the lower plate 21 to the lower end of the mounting part 11.

[0020] As shown in Figures 2 and 3(b), the front wall 15 of the storage section 14 is part of the detachable section 3 and is formed in a vertical plane along the up-down direction C. The front wall 15 is also formed with a plurality of ventilation holes 15a penetrating in the thickness direction (front-rear direction). The ventilation holes 15a are arranged side by side along the direction A. In this embodiment, a plurality of ventilation holes 15a are formed, but only one ventilation hole 15a may be formed as long as the desired opening area can be secured.

[0021] As shown in Figures 2 and 3(a), the rear wall 16 of the storage section 14 is disposed rearward of the front wall 15 and is formed as a vertical plane along the up-down direction C. The rear wall 16 is a part of the main body 2 and is formed to extend downward from the connection point between the lower plate portion 21 and the connection portion 22. The rear wall 16 also has a plurality of ventilation holes 16a penetrating in the thickness direction (front-to-back direction). The plurality of ventilation holes 16a are arranged side by side along the direction A. In this embodiment, a plurality of ventilation holes 16a are formed, but only one ventilation hole 16a may be formed as long as the desired opening area can be ensured.

[0022] A pair of protrusions 16b protruding forward is formed on the lower part of the front surface of the rear wall 16. The pair of protrusions 16b extend along the entire length of the drainer 1 in direction A. The pair of protrusions 16b are also arranged spaced apart from each other in the up-down direction. A fitting portion 16c is formed between the pair of protrusions 16b, into which the rear end of the bottom wall 17 can be fitted. This makes it possible to fit an insertion portion 17b (described later) of the detachable portion 3 into the fitting portion 16c by sliding the detachable portion 3 in the front-rear direction. This makes it easier to attach and detach the detachable portion 3 to and from the main body 2, improving workability.

[0023] As shown in FIGS. 2 and 3(a), the protrusion 19 is a part of the main body 2 and protrudes horizontally rearward from the lower end of the rear wall 16. The protrusion 19 extends along the entire length of the flashing member 1 in direction A. Because the protrusion 19 protrudes rearward beyond the rear wall 16, when the flashing member 1 is attached to the base 103, as shown in FIG. 1, the tip of the protrusion 19 abuts against the foundation packing 102, forming a space V between the rear wall 16 and the foundation packing 102. The formation of the space V in this manner makes it less likely that the air vent 16a in the rear wall 16 will be blocked by a portion other than the air vent 102a in the foundation packing 102, and the air vent 102a will be blocked by a portion other than the air vent 16a in the rear wall 16. This makes it possible to prevent a decrease in breathability of the building skeleton 100.

[0024] The water-stopping material 41 is formed in a sheet shape and is attached to the entire underside of the protrusion 19 and the protrusion 16b that is located at the lowest of the pair of protrusions 16b. The water-stopping material 41 is made of the same material as the water-expansion material 30 described below. Note that the water-stopping material 41 may be made of a material other than the water-expansion material 30 (for example, a material such as rubber or a soft resin) as long as it is capable of stopping water from entering between the protrusion 19 and the foundation 101.

[0025] As shown in Figures 2 and 3(b), the bottom wall 17 of the storage section 14 is part of the detachable section 3 and has a bottom plate section 17a and an insertion section 17b. The bottom plate section 17a is a plate-like section that extends horizontally rearward from the lower end of the front wall 15. The insertion section 17b is a plate-like section that is connected to the rear end of the upper surface of the bottom plate section 17a and extends horizontally rearward from the rear end. In this way, the bottom wall 17 is configured as a plate-like section in which the bottom plate section 17a and the insertion section 17b are connected in a stepped manner.

[0026] As shown in FIGS. 2 and 3(b), the connecting plate 31 of the detachable part 3 is a plate-like part that extends horizontally rearward from the upper end of the front plate 13b. The connecting plate 31 connects the upper end of the front plate 13b to the upper end of the front wall 15. A through hole 31a is formed in the connecting plate 31. A female thread is formed on the inner circumferential surface of the through hole 31a. With the insertion part 17b fitted into the fitting part 16c of the main body 2, the detachable part 3 is fixed to the main body 2 by aligning the through hole 31a with the through hole 21a1 and threading screws 50 into the through holes 31a and 21a1 from below.

[0027] As shown in FIG. 2, the water-swelling material 30 is accommodated in the accommodation space S of the accommodation unit 14. More specifically, the water-swelling material 30 is attached and fixed to the bottom wall 17 as shown in FIGS. 2 and 3(b). The water-swelling material 30 may be disposed anywhere in the accommodation space S, but is preferably spaced apart from the front wall 15 and the rear wall 16. This prevents the water-swelling material 30 from blocking the ventilation holes 15a, 16a when it has not absorbed water. Furthermore, as long as the water-swelling material 30 is disposed in the accommodation space S, it does not have to be fixed to the bottom wall 17 or the like.

[0028] The water-swelling material 30 is a member made of a known material that expands in volume by absorbing water. In this embodiment, the water-swelling material 30 is made of highly water- and moisture-absorbent fibers made by fiberizing a polymer whose main component is sodium polyacrylate, but it may also be made of other materials.

[0029] The water-expandable material 30 has a band shape extending along the entire length of the flashing member 1 in direction A. When the water-expandable material 30 has not absorbed water, an air passage is secured between the water-expandable material 30 and the upper wall 18 in the storage space S, connecting the air vent 15a in the front wall 15 and the air vent 16a in the rear wall 16, as shown by the solid line in FIG. 2 . On the other hand, if water enters the storage space S through the air vent 15a in the front wall 15 due to underfloor flooding or the like, the water-expandable material 30 absorbs water. When the water-expandable material 30 has absorbed water, it expands to fill the entire storage space S, as shown by the two-dot chain line in FIG. 2 . This blocks the air passage in the storage space S, blocking communication between the air vent 15a in the front wall 15 and the air vent 16a in the rear wall 16. Furthermore, by forming multiple protrusions 18a on the underside of upper wall 18, as shown in Figure 2, multiple protrusions 18 bite into the upper part of expanded water-expanding material 30. This effectively prevents water from seeping in between the underside of upper wall 18 and water-expanding material 30.

[0030] Next, a method for replacing the water-expanding material 30 in the water-draining member 1 will be described below. To replace the water-expanding material 30, remove the screw 50 shown in FIG. 1 from below. Then, pull the detachable part 3 forward, removing the insertion part 17b from the fitting part 16c. This allows the detachable part 3 with the attached water-expanding material 30 to be removed. Then, insert the insertion part 17b of another detachable part 3 with a new water-expanding material 30 attached, or the insertion part 17b of the detachable part 3 with the water-expanding material 30 removed from the removed detachable part 3 and the new water-expanding material 30 attached, into the fitting part 16c from the front. Then, push the detachable part 3 rearward until the through-hole 31a faces the through-hole 21a1, and screw the screw 50 into the through-holes 31a and 21a1 from below. This secures the detachable part 3 to the main body 2, completing the replacement of the water-expanding material 30.

[0031] Next, a method for attaching the flashing member 1 to the building skeleton 100 will be described below. The flashing member 1 shown in FIG. 2 is prepared, containing the water-expansive material 30 before absorbing water. Then, as shown in FIG. 1, the mounting portion 11 of the flashing member 1 is attached to the side surface 103a of the base 103 of the building skeleton 100 with a nail or the like. At this time, the flashing member 1 is attached to the base 103 with the upper end of the mounting portion 11 aligned with the line drawn on the side surface 103a of the base 103. At this time, the flashing member 1 is attached to the base 103 with the protruding portion 19 abutting against the foundation 101 via the water-stopping material 41. In this way, the flashing member 1 is attached to the building skeleton 100.

[0032] As described above, in the flashing member 1 of this embodiment, before the water-expanding material 30 absorbs water, the storage space S of the storage section 14, in which the air vents 15a and 16a are formed, can serve as at least a part of the ventilation path connecting the outdoors to the building skeleton 100. Then, as the water-expanding material 30 absorbs water, it becomes possible to block communication between the air vents 15a and 16a in the storage space S. Therefore, simply by attaching the flashing member 1, it becomes possible to prevent water from entering under the floor when flooding occurs under the floor.

[0033] Furthermore, the front wall 15 and bottom wall 17 of the storage section 14 are configured to be detachable. This allows the water-expanding material 30 to be removed and replaced by removing the front wall 15 and bottom wall 17. Furthermore, if the bottom wall 17 can be removed, the draining member 1 can also be replaced together with the bottom wall 17.

[0034] In the above-described embodiment, the detachable portion 3 has the front wall 15 and the bottom wall 17. However, at least a portion of the front wall 15 or the bottom wall 17 may be configured to be detachable from the main body 2. Furthermore, when the water-expanding material 30 is fixed to the bottom wall 17, it is preferable that a portion including at least the portion to which the water-expanding material 30 is fixed be configured to be detachable from the main body of the drainer. This allows for easy replacement of the water-expanding material 30. Furthermore, at least a portion of the storage portion 14 may be configured to be detachable from the main body of the drainer so that the water-expanding material 30 disposed in the storage space S can be replaced. Furthermore, the detachable portion 3 and the main body 2 may be integrally configured. In this case, at least a portion of the front wall 15 or the bottom wall 17 may be configured to be openable so that the water-expanding material 30 can be stored in the storage portion 14 and removed from the storage portion 14 (i.e., the storage space S can be opened to the outside). This configuration also provides the same advantages as the detachable configuration described above.

[0035] Furthermore, a water-stopping material 41 is attached to the underside of the protrusion 19. This makes it possible to prevent water from seeping in between the protrusion 19 and the foundation 101 when the flashing member 1 is attached to the building skeleton 100 (base 103) while the protrusion 19 is placed on the foundation 101, even if the foundation 101 is uneven. In particular, when the water-stopping material 41 made of the same material as the water-expansion material is used, water can be prevented from seeping in more effectively.

[0036] While the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and various modifications are possible within the scope of the claims. For example, although the storage section 14 of the drainer 1 in the above-described embodiment has a front wall 15, a rear wall 16, a bottom wall 17, and an upper wall 18, the storage section 14 may have any shape as long as it has a storage space for storing the water-expanding material therein. Furthermore, the air vent 15a may also be formed in the bottom wall 17, or may be formed only in the bottom wall 17. In this case, it is desirable that the air vent 15a be formed between the water-expanding material (before absorbing water) 30 in the bottom wall 17 and the front wall 15. [Explanation of symbols]

[0037] 1. Draining material 11 Mounting part 12 Extension 13 Front flap 14 Storage section 15 Front wall 15a Ventilation hole 16 Back wall 16a Ventilation hole 17 Bottom wall 18 Upper Wall 19 Protrusion 30 Water expansion material 41 Water-stopping material 100 Building Frame 101 Basics 102 Foundation packing 103 Foundation S Storage space

Claims

1. a main body attached to a building skeleton and having a ventilation hole formed therein; a detachable part that is detachably attached to the main body part; A draining member characterized by having a water-expanding material that is placed in the detachable portion and expands in volume when it absorbs water, thereby closing the air vent.

2. The draining member according to claim 1, wherein the detachable portion is detachably attached to the main body portion so as to cover the ventilation hole from the outdoor side of the building frame.

3. The detachable portion has a vent hole formed therein facing the outdoor side of the building skeleton, The draining member according to claim 2, wherein the water-expanding material is disposed in an air passage connecting the air hole of the main body portion and the air hole of the detachable portion.

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