JP7461228B2 - Water stop structure and water stop method - Google Patents

Description

The present invention relates to a water-stopping structure and a water-stopping method.

Conventionally, as a water-stopping structure around a through-hole of a member, a water-stopping structure in which various sealing materials are arranged around the through-hole has been known. Patent Document 1 discloses this type of water-stopping structure. Specifically, in Patent Document 1, a drain pipe is passed through a drain hole of a parapet, and the space between the drain hole and the drain pipe is made watertight with a sealing material. Further, Patent Document 1 also discloses a structure that makes the space between the retaining collar of the drain pipe and the waterproof sheet watertight.

JP 2002-097760 A

However, even in fastening parts that fasten components together using penetrating members such as screws and bolts, waterproofing treatment may be required around the through holes through which the penetrating members pass, as in Patent Document 1.

An object of the present invention is to provide a water-stopping structure and a water-stopping method that can easily and reliably stop water around a through hole through which a penetrating member passes, in a fixing part in which members are tightened and fixed using a penetrating member. purpose.

The water-stopping structure according to the first aspect of the present invention is a water-stopping structure for a fixed part in which a fixed member is fastened and fixed to a fixed member by a flange of a penetrating member that penetrates the fixed member, and includes a first water-stopping member that is sandwiched between the fixed member and the fixed member and through which the penetrating member penetrates, a second water-stopping member that is sandwiched between the fixed member and the fixed member and disposed around the first water-stopping member, and a third water-stopping member that is sandwiched between the flange of the penetrating member and the fixed member.

In one embodiment of the present invention, the first water stop member is in contact with the penetrating member,
The elastic modulus of the first water stopping member is greater than the elastic modulus of the second water stopping member.

As one embodiment of the present invention, in the central axis direction of the penetrating member, the compression ratio of the second water stop member in its natural state is greater than the compression ratio of the first water stop member in its natural state.

In one embodiment of the present invention, the porosity of the second water-stopping member in its natural state is greater than the porosity of the first water-stopping member in its natural state.

As one embodiment of the present invention, the modulus of elasticity of one of the first water-stopping member and the second water-stopping member is greater than the elastic modulus of the other water-stopping member, and the center of the penetrating member In the axial direction, the compression ratio of the other water-stopping member in its natural state is greater than the compression ratio of the one water-stopping member in its natural state.

As one embodiment of the present invention, the second water stop member surrounds the entire circumference of the first water stop member.

In one embodiment of the present invention, the fixing member is a base member attached to a wall panel protruding upward from an external floor surface of the building, and the fixed member supports the Kasagi member and , a Kasagi receiving bracket that is tightened and fixed to the base member by the flange of the penetrating member, further comprising a waterproof member interposed between the base member and the Kasagi bracket, the Kasagi receiving bracket, The penetrating member passes through the waterproof member and is fastened and fixed to the base member.

The second aspect of the water-stopping method of the present invention is a water-stopping method for a fixed part in which a fixed member is fastened and fixed to a fixing member by a flange of a penetrating member that penetrates the fixed member, and a first water-stopping member through which the penetrating member penetrates and a second water-stopping member that is disposed around the first water-stopping member are sandwiched between the fixed member and the fixing member, and a third water-stopping member is sandwiched between the flange of the penetrating member and the fixed member.

The present invention provides a watertight structure and method that can easily and reliably stop water from entering the area around the through hole of a member when the member is fastened and fixed to the member using a through-hole member.

FIG. 1 is a sectional view showing a wall structure including a water stop structure as an embodiment of the present invention. FIG. 2 is an enlarged sectional view showing the water stop structure shown in FIG. 1 in an enlarged manner. 3(a) to 3(c) are diagrams showing an outline of an example of a method for forming the waterproof structure shown in FIG. 2 is a diagram showing the positional relationship of a first water-stopping member and a second water-stopping member attached to a cap board receiving bracket as a fixed member shown in FIG. 1 . FIG. It is a figure which shows the modification of the arrangement|positioning relationship of the 1st water stop member and the 2nd water stop member shown in FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a water stop structure and a water stop method according to the present invention will be illustrated with reference to the drawings. Common members and parts in each figure are designated by the same reference numerals.

FIG. 1 is a sectional view showing a wall structure 1 including a water stop structure 100 as an embodiment of the present invention. FIG. 1 shows a cross section of the wall structure 1 along the thickness direction.

The wall structure 1 shown in FIG. 1 is a wall structure that protrudes upward from the exterior floor surface of a building. Specifically, the wall structure 1 shown in FIG. 1 is a waist wall installed in an occupied outdoor space such as a balcony of a building. However, the wall structure to which the water-stopping structure of the present invention can be applied may be another wall structure, such as a parapet installed on a flat roof of a building. Furthermore, the water-stopping structure of the present invention is not limited to application to wall structures, but can also be applied to, for example, fixing parts where various exterior materials, decorative materials, devices, equipment, etc. exposed to outdoor spaces are fixed to the main body of a building, and various fixing parts in exterior structures. In this specification, the fixing part of the wall structure 1 is illustrated as an example of a fixing part to which the water-stopping structure of the present invention can be applied.

In addition, in this specification, in a building including the wall structure 1, a direction parallel to the height direction of the building is referred to as a "height direction", and on the surface of the wall panel 2 used for the wall structure 1, the height The direction perpendicular to this direction will be referred to as the "width direction," and the direction perpendicular to the surface of the wall panel 2 will be referred to as the "thickness direction." Further, in the thickness direction of the wall structure 1, the outdoor side of the building in plan view is referred to as the "outdoor side", and conversely, the indoor side of the building in plan view is referred to as the "indoor side". In addition, in this specification, the descriptions of "parallel", "orthogonal", and "perpendicular" include states of being substantially parallel, orthogonal, and perpendicular, respectively.

The wall structure 1 of this embodiment includes a wall panel 2 that partitions the inside and outside of a building and protrudes upward from the external floor of the building, a waterproof structure 3 that covers a panel top surface 2A of the wall panel 2, and a cap bracket 4. and a cap member 5 that covers the panel upper surface 2A from above the waterproof structure 3 and the cap support bracket and is supported by the cap support bracket 4. The panel upper surface 2A of the wall panel 2 is the edge surface of the wall panel 2 located on the upper side in the height direction.

The waterproof structure 3 includes a base member 31 that covers at least a portion of the panel top surface 2A of the wall panel 2, a waterproof member 32 that covers the base member 31, and a wet sealing material 33 that stops water between the waterproof member 32 and the panel top surface 2A. including.

The base member 31 is configured to cover at least a portion of the panel upper surface 2A of the wall panel 2. The base member 31 is a base for fixing a Kasagi support bracket 4 to which a Kasagi member 5 to be described later is attached. In this embodiment, the base member 31 includes a substantially rectangular plate-shaped upper piece 31A that extends to cover at least a portion of the panel top surface 2A of the wall panel 2, and a base member 31 that hangs down from the indoor end of the upper piece 31A. It is an L-shaped member in the thickness direction cross section of the wall structure 1, including a substantially rectangular plate-shaped side piece 31B that covers at least a part of the indoor surface of the wall panel 2. In this embodiment, the base member 31 is formed by bending a single long plate-like member. However, the base member 31 may be formed by joining a plurality of members by any method such as welding, adhesion, or fastening. Further, the base member 31 may be configured by stacking a plurality of members in a layered manner.

The base member 31 is attached to the wall panel 2 that projects upward from the external floor surface of the building. Specifically, the side piece 31B of the base member 31 is provided with a bolt insertion hole. The bolt 50 passes through the wall panel 2 from the bolt insertion hole of the side piece 31B to the outdoor side, and the base member 31 is fastened to the wall panel 2. That is, the base member 31 is fixed to the wall panel 2 by the bolts 50 not at the top piece 31A but at the side piece 31B. In a state where the base member 31 is attached to the wall panel 2, a space is defined between the upper piece 31A of the base member 31 and the panel top surface 2A of the wall panel 2. Thereby, the possibility that the tip of the screw 41 as the penetrating member 13 used for fixing the Kasagi receiving bracket 4 to the base member 31 will damage the panel upper surface 2A of the wall panel 2 can be reduced.

The waterproof member 32 is configured to cover the base member 31 and is interposed between the base member 31 and the capping bracket 4. The waterproof member 32 is a plate-like member having waterproof properties, such as a steel plate coated with a waterproof paint. The waterproof member 32 is an L-shaped member in the thickness direction cross section of the wall structure 1, including an upper piece 32A of a substantially rectangular plate shape extending to cover the upper piece 31A of the base member 31, and a side piece 32B of a substantially rectangular plate shape hanging down from the indoor side end of the upper piece 31A and covering the side piece 31B of the base member 31. The waterproof member 32 further has an outdoor side folded piece 32C that is folded back from the outdoor side end of the upper piece 32A to the indoor side and hanging down toward the panel upper surface 2A of the wall panel 2, and an indoor side folded piece 32D that is folded back from the lower end of the side piece 32B in the height direction toward the indoor side surface of the wall panel 2. As will be described in detail later, a wet sealant 33 is filled between the outdoor side fold piece 32C and the indoor side fold piece 32D and the wall panel 2. In this embodiment, the waterproof member 32 is formed by bending a single long plate-shaped member. However, the waterproof member 32 may be formed by joining multiple members by any method, such as welding, gluing, or fastening.

The wet sealant 33 is, for example, silicone, mortar, etc., but may be any material capable of watertightness. The wet sealant 33 includes a wet sealant 33A filled in the gap between the outdoor side fold piece 32C of the waterproofing member 32 and the surface of the wall panel 2, and a wet sealant 33B filled in the gap between the indoor side fold piece 32D of the waterproofing member 32 and the surface of the wall panel 2. The wet sealant 33A seals water from the outdoor side between the waterproofing member 32 and the panel upper surface 2A. The wet sealant 33B seals water from the lower side in the height direction of the wall structure 1 between the waterproofing member 32 and the indoor side surface of the wall panel 2.

The outdoor end of the waterproof structure 3 is located closer to the indoor side than the outdoor end of the panel top surface 2A of the wall panel 2. That is, the waterproof structure 3 is attached to the wall panel 2 so that at least a part of the outdoor side of the panel top surface 2A of the wall panel 2 is exposed. With this configuration, it is possible to position the coping member 5 that covers and decorates the waterproof structure 3 closer to the indoor side. Note that in this embodiment, the outdoor end of the wet sealant 33A is the outdoor end of the waterproof structure 3.

The Kasagi support bracket 4 supports the Kasagi member 5. Further, the Kasagi receiving bracket 4 is tightened and fixed to the base member 31 of the waterproof structure 3 by the penetrating member 13. More specifically, the Kasagi receiving bracket 4 is tightened and fixed to the upper piece 31A of the base member 31 of the waterproof structure 3 by the head 41A of the screw 41 serving as the flange 13A of the penetrating member 13. Details of this fixing part will be described later (see FIG. 2).

The Kasagi support bracket 4 of this embodiment is an L-shaped member in the thickness direction cross section of the wall structure 1, and covers the waterproof structure 3 together with the Kasagi member 5 from the upper side in the height direction and from the indoor side. However, the Kasagi receiving bracket 4 may have any shape and size depending on the Kasagi member 5.

The Kasagi member 5 is fixed to the Kasagi support bracket 4 while being supported by the Kasagi support bracket 4 so as to cover the Kasagi support bracket 4 from above in the height direction and from the indoor side. Specifically, the Kasagi member 5 of this embodiment includes a substantially rectangular plate-shaped top piece 5A that covers the panel top surface 2A of the wall panel 2 from above the waterproof structure 3, and a top piece 5A that hangs down from the indoor end of the top piece 5A. and a substantially rectangular plate-shaped first side piece 5B that covers the indoor side of the waterproof structure 3.

The upper surface of the upper piece 5A of the capping member 5 has a slope that slopes downward toward the outdoor side. Providing a slope on the upper piece 5A makes it difficult for dust to accumulate on the upper piece 5A of the capping member 5. Furthermore, the slope of the upper piece 5A slopes downward toward the outdoor side, allowing rainwater to flow toward the outdoor side of the wall structure 1. In this embodiment, the upper piece 5A of the capping member 5 also has a slope that slopes downward toward the indoor side, but this is not necessary. In addition, the first side piece 5B of the capping member 5 covers the indoor side of the waterproof structure 3. This reduces the visibility of the panel upper surface 2A of the wall panel 2 and the waterproof structure 3 from the indoor side, improving the design of the wall structure 1.

Furthermore, the cap member 5 includes a second side piece 5C that hangs down from the outdoor end of the upper piece 5A, and a lower piece 5D that is bent from the lower end of the second side piece 5C and extends indoors. The lower piece 5D of the Kasagi member 5 is located above the panel upper surface 2A of the wall panel 2. At least a portion of the lower piece 5D of the Kasagi member 5 is arranged at a position facing at least a portion of the panel top surface 2A of the wall panel 2. More specifically, at least a portion of the lower piece 5D of the present embodiment is closer to the outdoors than the outdoor end of the wet sealing material 33A, which is the outdoor end of the waterproof structure 3, and is in contact with the panel top surface 2A. It is arranged facing the panel top surface 2A without any other member interposed therebetween. Thereby, a space 6 is defined between the lower piece 5D of the Kasagi member 5 and the panel upper surface 2A of the wall panel 2. By having such a configuration, the Kasagi member 5 can cause rainwater flowing from the upper piece 5A and the like to fall from the lower piece 5D onto the panel upper surface 2A of the wall panel 2. As a result, even if the outdoor end of the waterproof structure 3 is placed closer to the indoor side than the outdoor end of the panel top surface 2A of the wall panel 2, dust will not remain on the panel top surface 2A of the wall panel 2. It becomes difficult to accumulate, and the wall structure 1 becomes difficult to get dirty. Note that, as in the present embodiment, at least a part of the lowermost end of the lower piece 5D of the Kasagi member 5 (the entire lower surface of the lower piece 5D in this embodiment) is arranged at a position facing the panel upper surface 2A of the wall panel 2. It is preferable that the With this configuration, rainwater flowing from the upper piece 5A and the like more easily falls onto the panel upper surface 2A of the wall panel 2 from the lower piece 5D.

The wall panel 2 is, for example, a panel made of reinforced concrete, such as lightweight aerated concrete (ALC). However, the wall panel 2 is not limited to ALC, and may be a panel made of any material such as a wooden panel.

A portion of the panel upper surface 2A of the wall panel 2 exposed to the space 6 has an inclined surface that descends toward the outdoors. As a result, rainwater falling from the lower piece 5D of the Kasagi member 5 onto the panel upper surface 2A can flow toward the outdoor side of the wall structure 1. Therefore, dust is less likely to accumulate on the panel upper surface 2A of the wall panel 2, and the wall structure 1 is less likely to get dirty.

Next, the water stop structure 100 according to this embodiment will be explained. FIG. 2 is an enlarged sectional view showing the vicinity of the water stop structure 100 in the wall structure 1 shown in FIG. 1.

The water-stopping structure 100 is a water-stopping structure of a fixing part 10 in which a fixed member 11 is fastened to a fixing member 12 by a flange 13A of a penetrating member 13 that penetrates the fixed member 11. The fixed member 11 in this embodiment is a capping support bracket 4. The fixing member 12 in this embodiment is a base member 31. The penetrating member 13 in this embodiment is a screw 41. That is, in the fixing part 10 in this embodiment, the capping support bracket 4 is fastened to the base member 31 by a head 41A of a screw 41 that penetrates the capping support bracket 4. More specifically, the capping support bracket 4 in this embodiment is fastened to the base member 32 by being sandwiched between the head 41A of the screw 41 and the base member 32 that is screwed to the shaft 41B of the screw 41. However, the fixed member 11 and the fixing member 12 are not limited to the capping bracket 4 and the base member 31 of this embodiment, and may be two members that are fastened and fixed by the penetrating member 13. The penetrating member 13 is not limited to the screw 41 of this embodiment. The penetrating member 13 may be, for example, a bolt, a combination of a bolt and a nut, or any other member that penetrates at least the fixed member 11 and is fastened and fixed to the fixing member 12. Therefore, the flange 13A of the penetrating member 13 is not limited to the head 41A of the screw 41, and may be, for example, the head of a bolt or a nut that is attached by screwing or welding to the bolt. Note that the screw 41 of this embodiment is a drill screw that penetrates the base member 31 without a pilot hole and is screwed to the base member 31, but is not limited to this configuration. In other words, a screw hole may be formed in the base member 31 in advance. The penetrating member 13 of this embodiment penetrates the base member 31 as the fixing member 12, but does not have to penetrate it.

The water-stopping structure 100 includes a first water-stopping member 14, a second water-stopping member 15, and a third water-stopping member 16. The first water-stopping member 14, the second water-stopping member 15, and the third water-stopping member 16 are each constructed as separate bodies. The first water-stopping member 14 is sandwiched between the fixed member 11 and the fixing member 12, and is penetrated by the penetrating member 13. The second water-stopping member 15 is sandwiched between the fixed member 11 and the fixing member 12, and is disposed around the first water-stopping member 14. The third water-stopping member 16 is sandwiched between the flange portion 13A of the penetrating member 13 and the fixed member 11.

The water-stopping structure 100 includes a first water-stopping member 14, a second water-stopping member 15, and a third water-stopping member 16, and is therefore capable of preventing liquids, such as rainwater, from penetrating into the fixed member 12 through the storage space of the shaft portion 13B of the penetrating member 13 (in this embodiment, the through hole 11A of the non-fixed member 11 and the threaded hole of the fixed member 12).

Specifically, the third water-stopping member 16 can prevent liquid from penetrating between the flange 13A of the penetrating member 13 and the fixed member 11 into the through hole 11A of the fixed member 11. Even if liquid penetrates between the flange 13A of the penetrating member 13 and the fixed member 11 into the through hole 11A of the fixed member 11, the first water-stopping member 14 can prevent the liquid from penetrating further into the fixed member 12. In other words, the third water-stopping member 16 serves as a primary water-stopping member and the first water-stopping member 14 serves as a secondary water-stopping member against the penetration of liquid from between the flange 13A of the penetrating member 13 and the fixed member 11, thereby reducing the possibility of liquid penetrating from the storage space of the shaft 13B of the penetrating member 13 to the fixed member 12, compared to the case where only one water-stopping member is disposed.

Furthermore, the presence of the second water-stopping member 15 can prevent liquid from penetrating from around the fixed member 11 and the fixing member 12 into the gap between the fixed member 11 and the fixing member 12 and into the storage space of the shaft portion 13B of the penetrating member 13. Even if liquid penetrates beyond the second water-stopping member 15 toward the storage space of the shaft portion 13B of the penetrating member 13, the presence of the first water-stopping member 14 can prevent the liquid from further penetrating toward the storage space of the shaft portion 13B of the penetrating member 13. In other words, the second water-stopping member 15 serves as a primary water-stopping member and the first water-stopping member 14 serves as a secondary water-stopping member against the penetration of liquid from the gap between the fixed member 11 and the fixing member 12, thereby reducing the possibility of liquid penetrating from the storage space of the shaft portion 13B of the penetrating member 13 to the fixing member 12 side, compared to the case where only one water-stopping member is disposed.

In this way, in the water stop structure 100, the first water stop member 14 serves as a secondary water stop part for both the second water stop member 15 and the third water stop member 16, which are arranged at different positions. , the area around the through hole 11A of the fixed member 11 can be easily and reliably stopped from water.

In addition, in this embodiment, the first water stop member 14 and the second water stop member 15 are sandwiched between the waterproof member 32 that covers the base member 31 and the Kasagi receiving bracket 4, and the Kasagi receiving bracket 4 is a penetrating member. A screw 41 as 13 passes through the waterproof member 32 and is tightened and fixed to the base member 31. Therefore, in the present embodiment, the first water-stopping member 14, the second water-stopping member 15, and the third water-stopping member 16 suppress liquid from entering the inside of the waterproof member 32 from the through-hole of the waterproof member 32. . Thereby, reduction in the waterproof effect of the waterproof structure 3 due to the penetrating member 13 penetrating the waterproof member 32 and being fastened can be suppressed. In this way, the first water-stopping member 14 and the second water-stopping member 15 are disposed between the fixed member 11 (the Kasagi receiving bracket 4 in this embodiment) and the fixing member 12 (the base member 31 in this embodiment). In addition, another member (in this embodiment, the waterproof member 32) may be interposed. Note that the screw 41 of this embodiment is a drill screw as described above, and penetrates the waterproof member 32 in which no through hole is formed in advance and is screwed to the base member 31; however, the screw 41 is not limited to this configuration. do not have. That is, a through hole may be formed in the waterproof member 32 in advance.

As shown in FIG. 2, the first water stop member 14 of this embodiment is in contact with the screw 41 as the penetrating member 13. More specifically, the first water stop member 14 of the present embodiment surrounds the shaft portion 41B of the screw 41 as the shaft portion 13B of the penetrating member 13, and extends around the shaft portion 41B around the shaft portion 41B as the central axis. It abuts the side surface of the shaft portion 41B over at least a portion of the direction, preferably over substantially the entire area. By doing so, the water stopping performance of the first water stopping member 14 around the through hole 11A of the fixed member 11 can be further improved. Note that the contact between the first water stop member 14 and the side surface of the shaft portion 41B of the screw 41 is achieved by, for example, contacting the first water stop member 14 in which no insertion hole is formed in advance with the non-fixed member 11 and the fixed member 12. This can be realized by inserting the screw 41 into the first water stop member 14 and piercing the first water stop member 14 with the screw 41 when tightening and fixing the non-fixed member 11 to the fixed member 12.

Further, in this embodiment, the elastic modulus of the first water stopping member 14 is greater than the elastic modulus of the second water stopping member 15. That is, in this embodiment, the first water stop member 14 is harder and less likely to deform than the second water stop member 15. By doing so, when the shaft portion 13B of the penetrating member 13 penetrates the first water stop member 14 while rotating the penetrating member 13, the frictional force with the side surface of the shaft portion 13B causes the first stop. The second water stop member 15, which can prevent the water member 14 from being damaged or deformed and deteriorate its sealing performance, and which the penetrating member 13 does not penetrate, is sandwiched between the member to be fixed 11 and the fixed member 12 and is flexible. It is compressively deformed to follow the surface irregularities of the fixed member 11 and the fixing member 12, thereby increasing adhesion and improving sealing performance. That is, by configuring the elastic modulus of the first water-stopping member 14 to be larger than the elastic modulus of the second water-stopping member 15, the water-stopping performance of the water-stopping structure 100 can be further improved.

In addition, in this embodiment, the compression rate of the second water-stopping member 15 in the natural state in the central axis direction of the penetrating member 13 is greater than the compression rate of the first water-stopping member 14 in the natural state. Here, the "natural state" means a state in which the water-stopping member sandwiched and compressed between the fixed member 11 and the fixing member 12 is released from compression. In short, in this embodiment, the second water-stopping member 15 is sandwiched between the capping bracket 4 as the fixed member 11 and the base member 31 as the fixing member 12 in a state in which it is compressed in the central axis direction of the penetrating member 13 more than the first water-stopping member 14. By making the elastic modulus and compression rate of the first water-stopping member 14 and the second water-stopping member 15 have the above-mentioned relationship, the second water-stopping member 15, which is not pierced by the penetrating member 13, is sandwiched between the fixed member 11 and the fixing member 12 in a state in which the soft member is compressed at a high compression rate compared to the first water-stopping member 14. This increases the sealing effect of the second water-stopping member 15 between the fixed member 11 and the fixing member 12, and further improves the water-stopping performance of the water-stopping structure 100.

Furthermore, as in the present embodiment, by arranging the second water stop member 15 having a small elastic modulus with a large compression ratio, the compression ratio of the second water stop member 15 can be changed from that of the first water stop member 15 having a large elastic modulus. This can be easily adjusted by adjusting the thickness of the water member 14. In other words, the second water stop member 15 with a small elastic modulus can easily achieve a stable compressibility due to the first water stop member 14 with a large elastic modulus, and the water stop performance of the second water stop member 15 is For example, it is possible to suppress variations depending on the ability of the worker. In addition, in this embodiment, as described above, the elastic modulus of the first water stopping member 14 is greater than the elastic modulus of the second water stopping member 15, and the compressibility of the second water stopping member 15 is higher than that of the first water stopping member 14. However, it is not limited to this configuration from the viewpoint of easily realizing a stable compression ratio of a member having a small elastic modulus. That is, from this point of view, the elastic modulus of the second water-stopping member 15 is made larger than the elasticity modulus of the first water-stopping member 14, and the compression ratio of the first water-stopping member 14 is made larger than the compression ratio of the second water-stopping member 15. You may. However, in this embodiment, as described above, from another viewpoint that takes into consideration the relationship with the penetrating member 13, the elastic modulus of the first water stopping member 14 is larger than that of the second water stopping member 15, and the second water stopping member 14 has a higher elastic modulus than the second water stopping member 15. It is preferable that the compression ratio of the water stop member 15 is larger than the compression ratio of the first water stop member 14.

3(a) to 3(c) are diagrams showing an overview of an example of a method for forming the water-stopping structure 100 shown in Fig. 2. Fig. 3(a) shows the state before the first water-stopping member 14 and the second water-stopping member 15 are sandwiched between the fixed member 11 and the fixing member 12, and before the third water-stopping member 16 is sandwiched between the flange portion 13A of the penetrating member 13 and the fixed member 11. Fig. 3(b) shows the state before the first water-stopping member 14 and the second water-stopping member 15 are sandwiched between the fixed member 11 and the fixing member 12, and before the third water-stopping member 16 is sandwiched between the flange portion 13A of the penetrating member 13 and the fixed member 11. FIG. 3(c) shows a state in which the first water-stopping member 14 and the second water-stopping member 15 are sandwiched between the fixed member 11 and the fixing member 12, and the third water-stopping member 16 is sandwiched between the flange portion 13A of the penetrating member 13 and the fixed member 11.

As shown in FIG. 3(a), before being sandwiched between the fixed member 11 and the fixing member 12, the second water-stopping member 15 is thicker than the first water-stopping member 14. In the state shown in FIG. 3(a), the thickness of the first water-stopping member 14 is, for example, about 2 mm. In contrast, in the state shown in FIG. 3(a), the thickness of the second water-stopping member 15 is, for example, about 10 mm. In this embodiment, the first water-stopping member 14 and the second water-stopping member 15, which have different thicknesses, are sandwiched and compressed between the fixed member 11 and the fixing member 12 until they become approximately the same thickness (for example, a thickness of 1.5 mm or less) (see FIG. 3(b) and FIG. 3(c)), thereby realizing the above-mentioned relationship in compression rate between the first water-stopping member 14 and the second water-stopping member 15. The first water-stopping member 14 and the second water-stopping member 15, which have different thicknesses (hereinafter referred to as "pre-compression thickness") before being compressed between the fixed member 11 and the fixing member 12, can be compressed to a desired thickness equal to or less than the pre-compression thickness of the first water-stopping member 14, which has a high elastic modulus and a thin pre-compression thickness.

As the material for the first water stop member 14 and the second water stop member 15, for example, various rubbers such as fluororubber, butyl rubber, and ethylene propylene diene rubber, and various resins such as acrylic resin can be used. However, the porosity of the second water stop member 15 in its natural state is preferably larger than the porosity of the first water stop member 14 in its natural state. The "natural state" here also means a state in which the compression of the water-stopping member, which is sandwiched and compressed between the fixed member 11 and the fixing member 12, is released, as described above. By doing so, it is easy to realize the second water stop member 15 which is softer than the first water stop member 14 and can be compressed at a higher compression rate than the first water stop member 14. The second water stop member 15 having such a large porosity can be realized by using a foamed body of ethylene propylene diene rubber, for example.

FIG. 4 is a plan view showing a part of the lower surface of the cap support bracket 4 to which the first water stop member 14 and the second water stop member 15 are attached in FIG. 3(a). Therefore, FIG. 4 shows the first water stop member 14 before being penetrated by the penetrating member 13 (see FIG. 2, etc.). Therefore, the first water stop member 14 in a state before being pierced by the penetrating member 13 covers the entire area of the through hole 11A. In FIG. 4, for convenience of explanation, the position of the through hole 11A of the Kasagi receiving bracket 4 as the fixed member 11 is shown by a broken line.

In the plan view shown in FIG. 4, the second water-stopping member 15 of this embodiment does not cover the entire periphery of the first water-stopping member 14. In this embodiment, the second water-stopping member 15 of this embodiment only needs to be arranged at least on the outdoor side (left side in FIG. 4) with respect to the first water-stopping member 14. In this way, the lower end position of the second side piece 5C of the cap member 5 is raised, and high water-stopping performance can be maintained even if rainwater enters the space 6 during strong winds. However, the arrangement of the first water-stopping member 14 and the second water-stopping member 15 is not limited to the arrangement shown in FIG. 4. FIG. 5 shows a modified example of the arrangement of the first water-stopping member 14 and the second water-stopping member 15 shown in FIG. 4. As shown in FIG. 5, the second water-stopping member 15 may be arranged to surround the entire periphery of the first water-stopping member 14. In this way, the water-stopping performance of the water-stopping structure 100 can be further improved.

The third water-stopping member 16 is sandwiched between the head 41A of the screw 41 as the flange 13A of the penetrating member 13 and the capping bracket 4 so as to surround the through hole 11A of the capping bracket 4 as the fixed member 11. The third water-stopping member 16 may be, for example, a washer or an O-ring as in this embodiment. The material of the third water-stopping member 16 is not particularly limited, and may be, for example, the same material as the first water-stopping member 14 and the second water-stopping member 15 described above.

In addition, the first water-stopping member 14, the second water-stopping member 15, and the third water-stopping member 16 in this embodiment are all dry water-stopping members. Therefore, compared to using wet water-stopping members such as wet sealants, it is possible to suppress variation in water-stopping performance due to the ability of the worker. In addition, compared to using wet water-stopping members, replacement work of the coping support bracket 4, etc. is easier.

Furthermore, as shown in Figures 2 to 4, the first water-stopping member 14 and the second water-stopping member 15 in this embodiment are arranged apart from each other without abutting each other, but they may be arranged in abutting contact with each other as long as they are made of separate members.

The water stop structure and water stop method according to the present invention are not limited to the specific structure and method shown in the embodiments described above, and various modifications and changes can be made without departing from the scope of the claims.

The present invention relates to a water-stopping structure and a water-stopping method.

1: Wall structure 2: Wall panel 2A: Panel top surface 3: Waterproof structure 4: Kasagi support bracket (fixed member)
5: Kasagi member 5A: Upper piece 5B: First side piece 5C: Second side piece 5D: Lower piece 6: Space 10: Fixed part 11: Fixed member 11A: Through hole 12: Fixed member 13: Penetrating member 13A: Flange portion 13B: Shaft portion 14: First water stop member 15: Second water stop member 16: Third water stop member 31: Base member (fixing member)
31A: Top piece 31B: Side piece 32: Waterproof member 32A: Top piece 32B: Side piece 32C: Outdoor side folded piece 32D: Indoor side folded piece 33, 33A, 33B: Wet sealing material 41: Screw (penetration member)
41A: Head (flange of penetrating member)
41B: Shaft 50: Bolt 100: Water-stop structure

Claims (7)

A water-stopping structure of a fixing part in which the fixing member is tightened and fixed to the fixing member by a flange of a penetrating member that penetrates the fixing member,
a first water stop member that is sandwiched between the fixed member and the fixing member and penetrated by the penetrating member;
a second water stop member sandwiched between the fixed member and the fixing member and arranged around the first water stop member;
a third water stop member sandwiched between the flange of the penetrating member and the fixed member ;
The first water stop member is in contact with the penetrating member,
The first water-stopping member has a higher elastic modulus than the second water-stopping member . The water stop structure according to claim 1 , wherein in the central axis direction of the penetrating member, a compression ratio of the second water stop member in a natural state is larger than a compression ratio of the first water stop member in a natural state. The water stop structure according to claim 2 , wherein the second water stop member has a larger porosity in its natural state than the first water stop member in its natural state. A water-stopping structure of a fixing part in which the fixing member is tightened and fixed to the fixing member by a flange of a penetrating member that penetrates the fixing member,
a first water stop member that is sandwiched between the fixed member and the fixing member and penetrated by the penetrating member;
a second water stop member sandwiched between the fixed member and the fixing member and arranged around the first water stop member;
a third water stop member sandwiched between the flange of the penetrating member and the fixed member;
The modulus of elasticity of one of the first water-stopping member and the second water-stopping member is greater than the elastic modulus of the other water-stopping member,
In the central axis direction of the penetrating member, a compression ratio of the other water-stopping member in its natural state is larger than a compression ratio of the one water- stopping member in its natural state. The water stop structure according to claim 1 , wherein the second water stop member surrounds an entire periphery of the first water stop member. The fixing member is a base member attached to a wall panel protruding upward from an exterior floor surface of a building,
the fixed member is a capping support bracket that supports a capping member and is fastened to the base member by the flange portion of the penetrating member,
A waterproof member is further provided between the base member and the cap board receiving bracket,
The waterproof structure according to claim 1 , wherein the coping support bracket is fastened and fixed to the base member with the penetrating member penetrating the waterproofing member. A waterproofing method for a fixed part in which a fixed member is fastened to a fixing member by a flange of a penetrating member that penetrates the fixed member, comprising the steps of:
a first water-stopping member through which the penetrating member penetrates and a second water-stopping member disposed around the first water-stopping member are sandwiched between the fixed member and the fixing member, and a third water-stopping member is sandwiched between the flange portion of the penetrating member and the fixed member;
The first water-stopping member is in contact with the penetrating member,
A water-stopping method , wherein the first water-stopping member has a greater elastic modulus than the second water-stopping member .

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