Screw-fastening waterproofing method and screw-fastening waterproofing structure

Abstract

To provide a screwing water cut-off method and a screwing water cut-off structure capable of obtaining proper water cut-off performance without using a special screw.SOLUTION: In a screwing water cut-off method fastening an attaching member 2 to an attached portion 1 by a screw 3: a sealing material 4 is heaped up on a screw entrance side of a prepared hole 1a formed in the attached portion 1; and the screw 3 inserted into a screw insertion hole 2a of the attaching member 2 is screwed to the prepared hole 1a of the attached portion 1 in a state where the sealing material 4 is surrounded by a peripheral wall forming member 5 disposed between the attaching member 2 and the attached portion 1, capable of compressively deforming, and having water cut-off property.SELECTED DRAWING: Figure 2

Description

Technical Field

[0006] ,

[0001] The present invention relates to a screwing waterstop method and a screwing waterstop structure for screwing a member on an outer wall surface or the like where water splashes.

Background Art

[0002] Conventionally, when fixing, for example, a support member for a louver to an outer wall surface where water splashes using a screw, a sealing material is injected into a lower hole formed in the outer wall surface, and construction is performed to stop water with this sealing material.

[0003] Further, Patent Document 1 discloses a drill screw for attaching a solar panel, which includes a male screw portion that screws into a field board, a roofing material, a cutting portion that drills a hole in the field board, and a sealing portion made of a sealing material that is disposed on the outer periphery of the male screw portion, softens due to the dynamic friction between the roofing material and the male screw portion, and re-hardens after the dynamic friction ends.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the above conventional construction method, the sealing material injected into the lower hole may be pushed out by a screw screwed into the lower hole. For this reason, the sealing material that should be located between the surface of the screw and the wall surface of the lower hole decreases, and there is a risk that sufficient waterstop performance cannot be obtained. Further, the special drill screw provided with a sealing portion made of the above sealing material has a drawback that the screw unit price becomes high.

[0006] In view of the above circumstances, this invention aims to provide a screw-fastened waterproofing method and screw-fastened waterproofing structure that can achieve good waterproofing performance without using special screws. [Means for solving the problem]

[0007] The screw-fastening waterproofing method of this invention is a method of fastening a member to a mounting portion with screws, and is characterized by comprising the steps of: applying a sealing material to the screw entry side of a pilot hole formed in the mounting portion; and, with the sealing material surrounded by a compressible and waterproof surrounding wall forming member placed between the member and the mounting portion, passing a screw inserted through a screw insertion hole in the member through the sealing material and screwing it into the pilot hole in the mounting portion.

[0008] With the above method, when the screw is screwed into the pilot hole, the applied sealant can be pushed into the pilot hole. At this time, the surrounding wall forming member prevents the sealant from spreading laterally, so that the sealant is introduced into the pilot hole accurately. This makes it possible to fill the space between the surface of the screw and the wall of the pilot hole with sealant without any gaps. In addition, the watertightness of the surrounding wall forming member improves the watertight performance against water entering through the gap between the member and the part to be attached.

[0009] In the above-described screw-fastening waterproofing method, the surrounding wall forming member may have continuously expanding bubbles. This allows the surrounding wall forming member to be deformed to be as thin as possible by compression from the member. For example, even if the surrounding wall forming member is located on a protrusion on an uneven outer wall surface, the surrounding wall forming member can be deformed to be as thin as possible, so that the member can be attached to the mounting portion in a position as parallel as possible.

[0010] The above-described screw fastening waterproofing method may include a step of sealing the space between the screw head and the component. This further improves the waterproofing performance.

[0011] Furthermore, the screw-fastened watertight structure of this invention is characterized by comprising: a screw inserted through a screw insertion hole of the member and screwed into a pilot hole of the mounting portion; a peripheral wall forming member having watertight properties located between the member and the mounting portion and facing the surface of the screw; and a sealing material located between the surface of the screw and the peripheral wall of the pilot hole.

[0012] With the above configuration, the surrounding wall forming member having water-sealing properties can prevent water from entering between the above member and the mounting portion. Furthermore, even if water were to seep through the surrounding wall forming member and out towards the screw, it could be stopped by the sealing material located between the surface of the screw and the surrounding wall of the pilot hole.

[0013] In the above-described screw-fastened waterproofing structure, the surrounding wall forming member may have continuously foamed air bubbles. This allows the surrounding wall forming member to be positioned as parallel as possible to the mounting portion, even when it is located on a protruding part of an uneven outer wall surface, since the surrounding wall forming member is as thin as possible.

[0014] In the above-described water-sealing structure, a water-sealing member may be provided between the head of the screw and the member. This further improves the water-sealing performance. [Effects of the Invention]

[0015] With this invention, good water-sealing performance can be obtained without using special screws at the point where the component is fastened to the mounting part with screws. [Brief explanation of the drawing]

[0016] [Figure 1] Figures (A) and (B) are explanatory diagrams showing other examples of exterior wall structures to which the screw-fastening waterproofing method of the embodiment is applied. [Figure 2] This is an explanatory diagram illustrating the general steps of the screw fastening waterproofing method according to the embodiment. [Figure 3]It is an explanatory drawing which illustrated the surrounding wall forming member used for the screw - fastening water - stopping method of an embodiment. [Figure 4] It is an explanatory drawing which showed the screw - fastening water - stopping structure of an embodiment. [Figure 5] It is an explanatory drawing which showed the screw - fastening water - stopping structure of another embodiment.

Mode for Carrying Out the Invention

[0017] Hereinafter, embodiments of this invention will be described based on the accompanying drawings. As shown in FIGS. 1(A) and 1(B), the screw - fastening water - stopping method of this embodiment can be applied to a location where the outer wall facing material is the mounting portion 1. To the mounting portion 1, for example, a mounting member 2 which is a mounting fitting of a louver L1 is attached by screws (drill screws, etc.) 3. On the surface of the above - mentioned outer wall facing material, an uneven pattern is formed.

[0018] In the mounting member 2, a screw insertion hole 2a through which the screw 3 can be inserted is formed. An operator, for example, passes a chisel - shaped member through the screw insertion hole 2a and makes a mark indicating the position for forming a pilot hole on the surface of the mounting portion 1 with the tip of this chisel - shaped member. After the operator makes the above - mentioned mark on the mounting portion 1, once the mounting member 2 is separated from the mounting portion 1, as shown in (a) of FIG. 2, a pilot hole 1a is formed at the position where the mark is made using a drill D.

[0019] As shown in (b) of FIG. 2, the operator mounts the sealing material 4 in a hemispherical shape on the screw - entry side of the pilot hole 1a formed in the mounting portion 1. Of course, at this time, the sealing material 4 may be filled in the pilot hole 1a.

[0020] For example, at the stage where the mounting member 2 is factory-produced, a peripheral wall forming member 5 is pre-attached around the screw insertion hole 2a on the back surface of the mounting member 2 with an adhesive or the like. As shown in (c) of FIG. 2, an operator places the back surface side of the mounting member 2 against the surface of the attachment target portion 1 and positions the peripheral wall forming member 5 on the sealing material 4 placed on the attachment target portion 1. As shown in FIG. 3, the peripheral wall forming member 5 has a through hole 5a at the center. When the mounting member 2 is placed against the surface of the attachment target portion 1, the position of the through hole 5a is aligned with the position of the lower hole 1a formed in the attachment target portion 1. The peripheral wall forming member 5 is made of a sponge-like synthetic rubber, resin material, or the like, is compressibly deformable, and has water-stopping properties. In this embodiment, the peripheral wall forming member 5 has continuously foaming (including semi-continuously foaming) bubbles.

[0021] As described above, when the screw insertion hole 2a is aligned with the lower hole 1a of the attachment target portion 1 and the back surface side of the mounting member 2 is placed against the attachment target portion 1 side, the peripheral wall forming member 5 exists so as to surround the periphery of the sealing material 4 between the attachment target portion 1 and the mounting member 2.

[0022] As shown in (d) of FIG. 2, the operator passes the screw 3 through the screw insertion hole 2a and the through hole 5a of the peripheral wall forming member 5, and screws this screw 3 into the lower hole 1a of the attachment target portion 1. That is, the operator passes the screw 3 inserted from the screw insertion hole 2a of the mounting member 2 through the sealing material 4 surrounded by the peripheral wall forming member 5 and screws it into the lower hole 1a of the attachment target portion 1.

[0023] With the screw-fastening waterproofing method described above, when the screw 3 is screwed into the pilot hole 1a of the mounting part 1, the applied sealant 4 can be pushed into the pilot hole 1a. At this time, the surrounding wall forming member 5 suppresses the lateral spreading of the sealant 4, so that the sealant 4 is accurately introduced into the pilot hole 1a. As a result, it becomes possible to have the sealant 4 without any gaps between the surface of the screw 3 and the wall surface of the pilot hole 1a, and good waterproofing performance is obtained. In addition, the waterproofing properties of the surrounding wall forming member 5 also provide good waterproofing performance against water entering through the gap between the mounting member 2 and the mounting part 1. Furthermore, special screws can be eliminated.

[0024] Furthermore, if the surrounding wall forming member 5 has continuous foaming cells, it can be deformed to be as thin as possible when compressed. Therefore, even if the surrounding wall forming member 5 is located on a protruding part of the uneven outer wall surface, it can be deformed to be as thin as possible, allowing the mounting member 2 to be mounted in a position as parallel as possible to the mounting part 1. Even if the surrounding wall forming member 5 has continuous foaming cells, the continuous cells are crushed when compressed, so watertightness can be ensured. Also, if the surrounding wall forming member 5 has semi-continuous foaming cells with some closed cells, the deformability under compression is inferior to that of continuous cells, but watertightness is improved.

[0025] According to the method of the above embodiment, it is possible to suppress the intrusion of water from routes II and III shown in Figure 4. To further improve water-sealing performance, the intrusion of water from route I may also be prevented. For this purpose, as shown in Figure 5, a water-sealing treatment may be performed by interposing, for example, a rubber packing 7, which is a water-sealing member, between the head 3a of the screw 3 and the mounting member 2. Note that in Figure 4, the gap between the head 3a of the screw 3 and the mounting member 2 is shown to be larger than it actually is in order to depict the intrusion of water from route I. Also, in Figures 4 and 5, a large gap is shown between the mounting member 2 and the part to be mounted 1 at the point where water intrusion from route II occurs, but such a gap may occur in the recessed areas of the surface irregularities of the part to be mounted 1.

[0026] Furthermore, by carrying out the above method, a screw-fastened watertight structure according to the embodiment can be obtained. As shown in Figure 4, this screw-fastened watertight structure comprises a screw 3 inserted through a screw insertion hole 2a of a mounting member 2 and screwed into a pilot hole 1a of a mounting portion 1, a peripheral wall forming member 5 having watertight properties located between the mounting member 2 and the mounting portion 1 and facing the surface of the screw 3, and a sealing material 4 located between the surface of the screw 3 and the peripheral wall of the pilot hole 1a.

[0027] With this type of screw-fastening watertight structure, the intrusion of water from between the mounting member 2 and the part to be mounted 1 can be prevented by the surrounding wall forming member 5 which has the watertight properties described above. Furthermore, even if water were to permeate the surrounding wall forming member 5 and seep out towards the screw 3, it would be stopped by the sealing material 4 located between the surface of the screw 3 and the surrounding wall of the pilot hole 1a.

[0028] Furthermore, in the above-described screw-fastened waterproofing structure, if the surrounding wall forming member 5 has continuously foaming bubbles, the surrounding wall forming member 5 is positioned at a protrusion on the uneven outer wall surface, and is attached to the mounting member 2 in a position as parallel as possible to the mounting portion 1.

[0029] Furthermore, in the above-described screw-fastened watertight structure, if a rubber packing 7, which is a watertight member, is also provided on the head 3a side of the screw 3, as shown in Figure 5, the watertightness is further improved.

[0030] Furthermore, in the above-described screw-fastening waterproofing method and screw-fastening waterproofing structure, it is desirable that the surrounding wall forming member 5 does not protrude from the edge of the mounting member 2. Therefore, taking this point into consideration, it is preferable to set the edge clearance from the center of the screw insertion hole 2a to the edge of the mounting member 2.

[0031] Although embodiments of this invention have been described above with reference to the drawings, this invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as this invention, or within the equivalent scope. [Explanation of symbols]

[0032] 1: Mounting part 1a: Pilot hole 2: Mounting components (components) 2a: Screw insertion hole 3: Screw 3a: Head 4: Sealant 5: Surrounding wall forming member 7: Rubber gasket (waterproofing component) D: Drill

Claims

1. A method of fastening a component to a mounting part using screws, The process involves applying a sealing material to the screw entry side of the pilot hole formed in the mounting portion, A screw-fastening waterproofing method characterized by the steps of: positioning a compressible and watertight surrounding wall forming member on the applied sealing material; forming a state in which the sealing material is surrounded by the surrounding wall forming member located between the member and the mounting part; and in this state, passing a screw through the screw insertion hole of the member and screwing it through the sealing material and into the pre-drilled hole of the mounting part.

2. A screw fastening waterproofing method according to claim 1, characterized in that the surrounding wall forming member has continuously expanding bubbles.

3. A screw fastening waterproofing method according to claim 1 or claim 2, characterized in that it includes a step of sealing the space between the head of the screw and the member.

4. A method for fastening a member to a mounting part by screw, The process involves applying a sealing material to the screw entry side of the pilot hole formed in the mounting portion, A screw-fastening watertightening method, comprising the steps of: surrounding the sealing material with a compressible and watertight surrounding wall forming member positioned between the above member and the mounting portion; inserting a screw through a screw insertion hole in the above member; passing the screw through the sealing material; and screwing it into the pre-drilled hole in the mounting portion, wherein the surrounding wall forming member is pre-bonded in a position that does not block the screw insertion hole in the above member.

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